JPH0978109A - Cermet composite member and manufacturing method thereof - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] A highly durable cermet composite member capable of suppressing the frequency of repair and replacement of the cermet layer while maintaining the functions as a protective layer and a function imparting layer for the base material, and a method for producing the same. I will provide a. A guide roll 10 is mounted on a support base 28 of a lower lid 18.
Is fixed and the cermet powder is filled into the gap 34 of the chamber 32 surrounding the roll 10 at a required filling rate. The heat insulating layer 24 and the cylindrical body 19 are arranged on the lower lid 18, and the upper lid 16 is arranged on the cylindrical body 19 to form a hermetically sealed high-pressure container 20. The inside of the high-pressure container 20 was held for 2 to 5 hours under the condition that the pressure was 1200 MPa and the temperature was 1130 ° C. As a result, a thick cermet layer having a porosity of 0.1% or less is formed on the surface of the guide roll 10 by metal diffusion bonding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cermet composite member in which a cermet layer having a required thickness is formed on the surface of a base material by hot isostatic pressing and a method for producing the same.

[0002]

2. Description of the Related Art For example, in a line for galvanizing a steel sheet by bumping, a guide roll or the like arranged in a bath of molten zinc is
It is made of stainless steel or chrome molybdenum steel, and a cermet layer formed on it is used. This is because the guide rolls are immersed in a molten zinc bath and therefore required to have corrosion resistance to zinc, while cermets are generally said to have excellent corrosion resistance.

The cermet layer on the surface of the guide roll is conventionally mixed on the surface of the guide roll by thermal spraying using mixed powder prepared by mixing ceramic powder and metal powder in a required ratio or separately prepared cermet sintered powder as a raw material. It is formed by a method of sintering powder.

The reason why the ceramic layer is not completely formed is to secure the toughness of the roll surface. And
Since the cermet layer originally contains the metal phase, the metal phase is also melted by a slight amount. Further, wear due to contact with the steel plate is also added. As a result, the cermet layer is currently melted and worn away over time.

However, since the thickness of the cermet layer which can be formed by thermal spraying is extremely thin and can only be about 5 mm or less, the cermet layer of the guide roll gradually becomes useless due to the above-described erosion and wear over time. Come on. For this reason, it is necessary to periodically grind and remove the cermet layer that has been melted and abraded, and to form a new cermet layer by thermal spraying, and the production time decreases due to the loss time required for performing another thermal spraying. At the same time, there is a problem that running cost increases.

Although it is not impossible to increase the film thickness of the cermet layer even by thermal spraying, in this case, the porosity of the cermet layer is high, about 5% or more,
Sufficient melting resistance cannot be imparted to the base material. Therefore, in the past, inefficient work was obliged while repeatedly replacing the thin cermet layer as described above.

Further, conventionally, as a cylinder for aluminum die casting, a cylinder made of steel having an inner surface subjected to nitriding treatment, and a cylinder made of steel having a sintered body of Ti-SiC fitted thereinto,
It is known that a ceramic sintered body is fitted into the inner surface of a steel cylinder. The above-mentioned type has a problem that the corrosion resistance to an aluminum alloy is not sufficient and the service life is short.

On the other hand, the above-mentioned types have good melting loss resistance to aluminum alloys, but have low toughness, and due to repeated thermal shock or the like, chips or cracks are caused early even during the service life, resulting in wear. There is a problem of doing. Further, since the above is mechanical assembly by fitting, there is a problem that reliability is low such as loosening due to difference in thermal expansion and a structure such as heating, heat retaining, water cooling is required to prevent loosening and distortion. is there.

In view of the above-mentioned drawbacks inherent in the above-mentioned conventional technique, the present invention has been proposed to preferably solve the above-mentioned drawbacks, and maintains the functions as a protective layer and a function-imparting layer for the base material. It is an object of the present invention to provide a highly durable cermet composite member capable of suppressing the frequency of repair / replacement of the cermet layer and a method for manufacturing the same.

[0010]

Means for Solving the Problems, Embodiments of the Invention and Effects of the Invention A cermet composite member of the present invention is a cermet composite member having a cermet layer formed on the surface of a base material, wherein the cermet layer has a porosity of 1%. It is characterized in that it is formed as the following layer, and the cermet layer and the base material are integrated by metal diffusion bonding. Here, when the base material is a roll, the cermet layer may be metal diffusion bonded to the outer surface of the base material, and when the base material is a cylinder, the cermet layer is a cylinder of the base material. It is advisable to carry out metal diffusion bonding on the inner surface of the hole. That is, in the present invention, the surface of the base material includes not only the outer surface but also the inner surface.

According to this composite member, since the cermet layer is formed as a layer having a porosity of 1% or less, even if the thickness is increased, the cermet layer can sufficiently serve as a protective layer or a function-imparting layer for the base material. be able to. Therefore, the durability of the cermet layer is increased, and the work efficiency can be improved.

In addition, as a method suitable for producing such a cermet composite member, the present invention provides the base material and the cermet powder so that the surface of the base material is exposed to the cermet powder. A can body (hereinafter, referred to as “HIP can”) is filled, and a hot isotropic pressure press sintering device (hereinafter, “HIP can”) is used.
IP device ". The method for producing a cermet composite member characterized in that the pressure sintering is applied according to (4) is completed. Alternatively, a HIP can is filled with the base material and the formed body or the sintered body so that the formed body or the sintered body made of the cermet powder is exposed to the surface of the base material, and hot isostatic pressing is performed. A method of manufacturing a cermet composite member, which is characterized in that pressure sintering is applied by a binder, has been completed.

In this case, when the base material is a cylinder, it is housed in a HIP can with its inner surface facing cermet powder or a cermet compact, and a soft material such as mild steel is mainly used as the core metal. It is recommended to set to and apply HIP. The reason why the core metal is used is that it is easy to finally form the core hole by cutting. Of course, it is not necessary to use a cored bar, but especially when a cermet layer is provided on the inner surface of a long cylindrical body, it is difficult to machine a hard cermet layer, so a cored bar is effective.

According to these methods, it is possible to form a cermet layer which is dense and is in a state of being metal-diffusion bonded to the base material by HIP, and the above porosity of 1% or less can be sufficiently achieved. Conversely speaking, the pressurizing condition and the like may be set so that the porosity of the cermet layer in the product is 1% or less.
Also, since powder that has already been cermet is used,
It also has the advantage that the properties of the cermet layer are exhibited as intended and there is no unevenness.

In these methods for producing a cermet composite member, a cermet powder different from the cermet powder is further exposed onto the cermet layer of the cermet composite member produced by the HIP,
HI the cermet composite member and the cermet powder
It is filled in a P can and pressure-sintered by a HIP device, or on a cermet layer of the cermet composite member produced by the HIP, further, a molded body of cermet powder different from the cermet powder or A HIP can is filled with the cermet composite member and the molded body or the sintered body so that the sintered body is exposed.
Pressure sintering may be applied by a HIP device.

By doing so, it becomes possible to form a cermet layer as a functionally graded layer in which the ceramic concentration gradually increases in the thickness direction. By making it a functionally graded layer, the cermet layer and the base material are well joined to the base metal as a cermet layer with a high metal concentration at the joint part,
By gradually increasing the ceramic concentration toward the outside, it is possible to sufficiently enhance functions such as melting loss resistance, wear resistance, oxidation resistance, and heat resistance on the surface side. Of course, not only the functionally graded layer, but the cermet itself may be made completely different for each cermet layer. Also, two layers,
The method may be repeatedly executed for three layers, four layers, ....

Here, in these cermet composite member manufacturing methods of the present invention, as the cermet powder, a ceramic powder and a metal or alloy powder are solution-treated, and one is carried in a state where the other is uniformly dispersed. It is advisable to use a composite powder. Such a composite powder is
For example, a powder of metal or alloy and a powder of ceramics are mixed, the mixed powder is granulated to a predetermined particle size, and then the granulated powder particles are formed into a melt or a semi-molten product at least in the particles. It is advisable to manufacture it by heating it up to, then rapidly solidifying it, and if necessary, subjecting it to a pulverizing step and then classifying it to a predetermined particle size.

Here, as a practical method of heating the mixed powder particles until a molten material or a semi-molten material is formed and rapidly solidifying, a powder overlay welding by arc heating using granulated powder particles as a welding material. To form a bead on a water-cooled bed, a method of arc melting or plasma arc melting using mixed powder particles as a melting material, and solidifying this while depositing it on a water-cooled hearth, or forming an ultra-high temperature layer by high-frequency plasma It is advisable to employ a method in which the granulated powder particles are passed through and the particles are melted and solidified by particles to particles.

If necessary, the powder may be pulverized.
This is because crushing is not necessary when the granulated powder adjusted to the final particle size is melted and solidified with particles to particles. Further, as a method of granulation, if press granulation is performed, a binder is not required for granulation, so that the performance of the composite powder itself is not adversely affected by the inclusion of oxygen, carbon, or the like. But desirable.

Of course, when the metal and the ceramic form a uniform melt by the usual induction furnace melting or the like, the cermet powder may be produced by the well-known atomizing method. The HIP needs to be performed at a predetermined temperature equal to or lower than the liquidus temperature of the metal or alloy. this is,
This is because if HIP is performed at a liquidus temperature or higher, gravity segregation occurs due to the difference in specific gravity between metal and ceramics, and the uniformity of dispersion is impaired.

Various hard particles such as carbides, oxides, nitrides, suicides and borides can be used as the ceramics constituting the cermet powder. As described above, since the cermet composite member obtained by the present invention has high durability, it has an advantage that running cost can be reduced.

[0022]

EXAMPLES Next, the cermet composite member and the method for producing the same according to the present invention will be described below with reference to preferred examples. In the examples, a guide roll arranged in a galvanizing line will be described as the base material on which the cermet layer is formed. FIG. 1 is a partial cross-sectional view of a guide roll 10 manufactured by the manufacturing method according to the present invention, in which a cermet layer 12 having a required thickness is formed on the surface of the roll 10. In addition, this cermet layer 1
2 is formed by the HIP device 14 shown in FIG.

The HIP device 14 includes upper and lower lids 16 and 18.
The heat insulating layer 24 is concentrically arranged inside the high pressure container 20 with a required gap 22 between the high pressure container 20 composed of the cylindrical body 19 that can be sealed by the above.
The space 26 defined inside 4 and the gap 22 communicate with each other. A support base 28 is arranged on the lower lid 18, and the guide roll 10 forming the cermet layer 12 is positioned and fixed on the support base 28 upright through one shaft 30. In addition, the guide roll 10 positioned in the space 26 has a chamber 32 that functions as a HIP can at a portion where the cermet layer 12 is formed.
By this, a required gap 34 is defined and surrounded. The gap 34 is filled with a required amount of cermet powder in which ceramic powder of hard particles such as carbide, oxide, and nitride and metal powder such as cobalt and zircon are mixed.

As the cermet powder, Fe-Al
₂ O _{3 system, Ni · Cr-Al 2 O} 3 system, Ni-Zr ₂ O ₃
System, W-NbC system, Co-WC-based, Ni-ZrB ₂
System, Ni-MoSi ₂ based, Ni-Cr ₃ C ₂ -WC system,
_{Ti-TiB 2, Cr-ZrO} 2 or the like can be employed.

A heater 36 is arranged in the space 26 between the heat insulating layer 24 and the chamber 32 to heat the inside of the heat insulating layer 24 to a required temperature. Further, a supply source 38 of a gas (for example, argon gas) which is a pressure medium is connected to the upper lid 16 via a pump 40, and the gas is configured to maintain the inside of the high pressure container 20 at a required pressure. It

In the examples, as cermet powder,
A composite powder in which hard particles such as carbides, oxides, nitrides, suicides, borides and the like and metal powders and alloy powders are dissolved and one is supported in a dispersed state on the other is preferably used. The solution treatment here means a state in which ceramics and a metal are dispersed and mixed in a liquid phase-liquid phase or a solid phase-liquid phase in a high-temperature heated state, and then solidified in the dispersed / mixed state as it is. A state similar to the processing state. However, the difference from steel is that since the composite powder to be used in the present invention contains a large amount of ceramics (such as carbides and oxides), ceramics that do not dissolve in these metals are in a uniformly dispersed state, and The interface between the metal and the ceramic is in a solidified state while being wet.

Dispersing the other into one means that the metal serves as a base and carries the ceramic particles,
On the contrary, the ceramic may serve as a base to support the metal particles, or the metal and the ceramic may be mixed. The composite powder used as a raw material in the examples can be produced, for example, as follows.

That is, the particle size of the ceramic powder is 0.
A powder having a particle size of 0.1 to 50 μm is used as a metal powder.
A powder of 30 μm is prepared, and the ceramic powder and the metal powder are mixed to mix and adjust the raw materials. Then, the raw material mixture is mixed in a mixing stirrer so as to be in a homogeneous mixed state.

When the mixture thus obtained is in a homogeneous mixed state with a mixing stirrer, it is granulated with a press granulator and further sintered, crushed and classified to prepare a powder having a predetermined particle size. The metal / ceramics mixed powder obtained by the above is heated in a plasma lamination solidification furnace (hereinafter, referred to as “PPC furnace”) until at least a granulated powder particle is formed into a melt or a semi-melt in the particle. After that, it solidifies rapidly. That is, after the mixed powder particles are rapidly melted at an extremely high temperature by a plasma arc, they are rapidly solidified while being deposited on the cooling hearth, so that the metal and the ceramics are solutionized and one of them is supported in a dispersed state. A melted deposit of composite powder is produced. In addition, after the metal / ceramics mixed powder particles are rapidly solidified, if necessary, a pulverizing step is performed to classify the particles into a predetermined particle size.

Here, as a practical method of heating the mixed powder particles until a molten material or a semi-molten material is formed and rapidly solidifying, the granulated powder particles are used as a welding material and arc welding is used for the build-up welding. To form a bead on a water-cooled bed, a method of arc melting or plasma arc melting using mixed powder particles as a melting material, and solidifying this while depositing it on a water-cooled hearth, or forming an ultra-high temperature layer by high-frequency plasma It is possible to employ a method in which the granulated powder particles are allowed to pass therethrough, and the particles are melted and solidified with particles to particles.

Further, the pulverization may be carried out if necessary because pulverization is not necessary when the granulated powder adjusted to the final particle size is melted and solidified by particle-to-particle. Further, as a granulation method, if press granulation is performed, a binder is not required for granulation, and therefore, the performance of the composite powder itself is not adversely affected by mixing of oxygen and carbon. But desirable.

The production of the above-mentioned composite powder will be described by taking actual metals and ceramics as examples. For example,
In the Co-WC cermet, 140 g of Co powder having a particle size of 1 to 3 μm and 860 g of WC powder having a particle size of 1 to 3 μ were mixed and adjusted, and mixed and stirred by a mixing stirrer. Next, the mixture powder taken out from the mixing stirrer is granulated using a press granulator such as a rotary press similar to the device used for producing tablets in chemical production, and then further sintered, crushed and classified. Thus, a granulated powder having a particle size of about 3 to 8 mm was obtained.

The granulated powder thus adjusted to a predetermined particle size was melted and solidified in a PPC furnace as a melting material to form a molten deposit of the granulated powder having a weight of 1000 g.
The melting temperature at this time was about 1800 ° C., and the material powder was melted and solidified while being fed at a feeding rate of 200 g / min.

The melt or deposit of the composite powder thus obtained is mechanically ground in a stamp mill and then
It was subjected to a vibration classifier or an air stream classifier to obtain a composite powder having a particle size of 250 μm or less, which was suitable for use in the HIP device 14. The stamp mill was crushed in an Ar gas atmosphere.

Next, a method of forming the cermet layer 12 by the HIP device 14 will be described. First, the support base 2 of the lower lid 18
The guide roll 10 is positioned and fixed to the roller 8, and the gap 34 of the chamber 32 surrounding the roll 10 is filled with cermet powder at a required filling rate. And the heat insulation layer 24
The cylindrical body 19 is disposed on the lower lid 18, and the upper lid 16 is disposed on the cylindrical body 19 to form a sealed high-pressure container 20.

In this state, in the example, the guide roll 10 was manufactured under the following conditions. Cermet powder: Co-WC guide roll having a powder particle size of 5 to 53 μm: Chromium molybdenum steel (SCM440) Temperature: 1200 ° C. Pressure: 1200 MPa Holding time: 2 to 5 hr Thus, the surface of the guide roll 10 has a required film thickness. The cermet layer 12 was formed. By using, as the cermet powder, the composite powder manufactured by the above-described process, it is possible to set the filling amount in the chamber 32 to be large, whereby the film thickness of the cermet layer 12 is set to 5
It can also have a thickness of up to 30 mm. Moreover, even if the thickness of the cermet layer 12 is increased, since it is a dense layer due to HIP, the porosity thereof can be suppressed to an extremely low value of 1% or less, and the melt damage resistance is exhibited at all. Together with it, it becomes highly durable.

This means that, in the cermet layer 12 formed of the composite powder, as shown in the micrograph of FIG. 3 (A), the ceramics (the part that looks gray) and the metal (the part that looks white) are directional. A "dense" organization without
It can also be confirmed from the fact that the interface between the ceramics and the metal has extremely high wettability and transverse rupture strength and is formed as a layer having sufficient toughness. Then, as shown in FIG. 2B, the alloy steel (the part that looks white) and the cermet layer (the part that looks black) are firmly integrated by the diffusion bonding part (the band-shaped part between them). In the sprayed layer in the conventional example (by spraying) shown in FIG. 8, the ceramics and the metal are scattered, and the difference from the example can be clearly seen.

As described above, since the cermet layer 12 which is extremely dense and has a porosity of 1% or less and is thick is formed on the surface of the guide roll 10 obtained by the manufacturing method of the embodiment, it is resistant to melting over a long period of time. Possibility can be retained. That is, since the life of the guide roll 10 is improved, the work of regenerating the cermet layer 12 can be omitted, the loss time associated with the regenerating work can be eliminated, the manufacturing efficiency can be improved, and the running cost can be reduced.

In the illustrated example, H is applied to the surface of the guide roll used for the galvanizing line which requires corrosion resistance.
The case where the cermet layer is formed by the IP device has been described, but the present application is not limited to this. That is, since the cermet layer is excellent in wear resistance and heat resistance, it is possible to apply it to a cutting tool such as a bite tip or to form a thick cermet layer by a hot forging device.

Further, as shown in FIG. 4, in manufacturing the cermet powder, the mixing ratio of the ceramic powder and the metal powder is changed so that the first cermet powder 51 having a large ceramic ratio and the ceramic ratio can be changed. The small second cermet powder 52 and the small second cermet powder 52 are prepared respectively, and first, only the second cermet powder 52 is made to face the surface of the base material 60, the HIP can 71 is filled, and the HIP device 70 is covered. The HIP can 71 is filled so that the surface of the manufactured composite member 61 faces the mixture of the second cermet powder 52 and the first cermet powder 51 at a ratio of 50 and 50.
HIP so that only the first cermet powder 51 is exposed to the surface of the composite member 62 thus manufactured
The can 71 may be filled and applied to the HIP device 70 to form a cermet layer 64 having a three-layered gradient function on the composite member 63 as a final product. of course,
Further, the mixing ratio may be changed or a multi-layer may be formed.
Since it has a tilting function, the cermet layer 64 and the base material 60 are well compatible with each other, and the surface layer can exhibit the function as a cermet without any difficulty, so that an excellent composite member can be obtained.

Further, when filling the HIP can, the cermet powder may be formed in a ring shape in advance and fitted into the surface of the guide roll. Of course, a ring-shaped cermet sintered body may be fitted on the surface of the guide roll and subjected to HIP.

In addition, a composite member having a multi-layer structure made of different cermet powders may be manufactured instead of the gradient function. Further, the present invention may be used not only for the guide rolls as in the embodiment but also for forming the cermet layer on the inner surface of the cylinder member, for example. An example of this is an aluminum die casting cylinder. As another embodiment of the present invention, a method for manufacturing an aluminum die casting cylinder will be described with reference to FIGS.

Here, as shown in FIG. 5, the aluminum die casting cylinder sleeve 110 of the embodiment is assembled to the die sleeve 123 provided on the die 120 side forming the product cavity 121. Cylinder sleeve 1
A hopper port 111 is provided on the rear upper surface of the device 10, and a molten aluminum alloy is injected from here. Then, this molten metal is extruded to the die side by the plunger tip 113 to manufacture an aluminum die cast product.

The inner surface of the cylinder sleeve 110 has a double structure. The outside 115 of the main body is formed of SNCM439, and the inside 117 is a cermet layer. This cermet layer 117 is made of 3.1 C-2.3 Ni-2.
2.0Cr-4.3 Mo-9.0 V-Bal Co, HIP
Is integrated with the main body 115 by metal diffusion bonding.

This manufacturing is performed as shown in FIG. First,
In order to obtain a cermet powder for forming a cermet layer having the above composition, VC was increased to 15 for stellite.
A molten metal added in a wt% ratio is formed. At this time, stellite is melted using the high frequency induction furnace 131, and VC powder 135 having a particle size of 1 to 10 μm is added to the melt 133 (A). Next, the melt 13 of the cermet thus obtained
7 is sprayed while pouring it into the gas atomizer 139 to form a cermet powder 141 having a particle diameter of 350 μm or less (B).

Next, the SNCM 439 is placed in the HIP can 143.
The cylindrical body 145 and the cermet powder 141 described above are packed,
A SS 147 rod 147 is stored in the center and is subjected to HIP (C). HIP conditions are 1200 atm, 1200 ° C,
4 hours. Then, after being taken out from the HIP can, the cylinder sleeve 110 as shown in FIG. 5 is obtained through external cutting, boring, hopper mouth processing, and polishing (D).

As an example, a cylinder sleeve having a cermet layer to which VC powder was added at a ratio of 20 wt% with respect to stellite was also manufactured. Then, the following table shows the results of comparing the performance with the above-mentioned products (1) to (4) which are conventional products. In the examples, VC is set to 15 wt%, and in the examples, VC is set to 20 wt%.

[0048]

[Table 1]

Here, in the melting test,
A round bar test piece having a diameter of 10 mm and a length of 20 mm was formed, and this was placed in a molten metal of 2.5 Cu-11Si-Bal Al at 750 ° C.
It is the result of measuring the diameter of the test piece after soaking for 8 hours. Since the conventional example was completely melted,
0 mm. In addition, in Examples and Conventional Examples, a round bar test piece having a diameter of 10 mm was formed only from the cermet layer and the ceramic layer.

The service life is the time when it is actually used as a cylinder for aluminum die casting. The conventional example has a range of 1 to 250,000 shots and 1 to 300,000 shots because the service life is 2 from the viewpoint of melting resistance.
This is because there are 50,000 shots and 300,000 shots, but they may be damaged due to early wear before reaching this point.

Evaluation of early wear is as follows: ◎ = "I have almost no worries", ◯ = "I have almost no worries", X = "I have worries"
Means From the above test results,
It can be confirmed that, in terms of practical durability and reliability, the performance is significantly improved as compared with the conventional examples 1 to 3.

Regarding the examples, the cermet layer 1
FIG. 7 (A) is a photomicrograph of FIG. 17 and FIG. 7 is a photomicrograph of the bonding state between the cermet layer 117 and the base material 115.
It shows in (B). In FIG. 7B, the dark part in the right half is SNCM439, the white band in the middle is the diffusion bonding part, and the left half is the cermet layer of stellite + 15% VC.

As a result, even when repeatedly used for aluminum die casting and subjected to thermal fatigue or thermal shock, the joint portion is not damaged, and an aluminum die casting cylinder having good durability can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cermet composite member as an example.

FIG. 2 is a configuration diagram of a cermet composite member manufacturing apparatus as an example.

FIG. 3 is a photograph of a metallographic structure of a cermet layer and a diffusion joint formed in an example.

FIG. 4 is an explanatory view showing a manufacturing procedure of a cermet composite member as another embodiment.

FIG. 5 is a cross-sectional view of an aluminum die casting apparatus of still another embodiment.

FIG. 6 is an explanatory view showing a manufacturing procedure of the cylinder sleeve for aluminum die casting of the embodiment.

FIG. 7 is a photograph of a metallographic structure of a cermet layer and a diffusion joint formed in an example.

FIG. 8 is a photograph of a metal structure of a cermet layer in a conventional example.

[Explanation of symbols]

10 ... Guide roll, 12 ... Cermet layer, 14
... HIP device, 20 ... high-pressure container, 32 ... chamber, 36 ... heater, 40 ... pump, 51
・ ・ ・ First cermet powder, 52 ・ ・ ・ Second cermet powder, 60 ・ ・ ・ Base material, 61-63 ・ ・ ・ Composite member, 7
0 ... HIP device, 71 ... HIP can, 110 ...
・ Cylinder sleeve for aluminum die casting, 115 ・ ・ ・
Main body 117 ... inner surface, 131 ... high frequency induction furnace,
133 ... Stellite melt, 135 ... VC powder, 137 ... Cermet melt, 139 ... Gas atomizer, 141 ... Cermet powder, 143.
..HIP cans, 145 ... SNCM439 cylinders,
147 ... SS41 rod.

Claims (8)

[Claims] 1. A cermet composite member having a cermet layer formed on the surface of a base material, wherein the cermet layer is formed as a layer having a porosity of 1% or less, and the cermet layer and the base material are integrated by metal diffusion bonding. A cermet composite member characterized by the above. 2. The cermet composite member according to claim 1, wherein the base material is a roll, and the cermet layer is metal diffusion bonded to an outer surface of the base material. 3. The cermet composite member according to claim 1, wherein the base material is a tubular body, and the cermet layer is metal diffusion bonded to an inner surface of a tubular hole of the base material. . 4. A can body is filled with the base material and the cermet powder so that the surface of the base material is exposed to the cermet powder, and is pressed by a hot isostatic pressing device. A method for producing a cermet composite member, characterized in that sintering is added. 5. A can body is filled with the base material and the formed body or sintered body so that the formed body or sintered body made of cermet powder faces the surface of the base material, and hot isostatic pressing is performed. A method for producing a cermet composite member, wherein pressure sintering is applied by a pressure sintering device. 6. The method for producing a cermet composite member according to claim 4 or 5, wherein the cermet powder is further formed on the cermet layer of the cermet composite member produced by the hot isostatic pressing. So as to face the cermet powder different from the above, the cermet composite member and the cermet powder are filled in a can body, and pressure sintering is applied by a hot isostatic pressure sintering device. A method for manufacturing a cermet composite member, characterized in that 7. The method for producing a cermet composite member according to claim 4 or 5, wherein the cermet powder is further formed on the cermet layer of the cermet composite member produced by the hot isostatic pressing. The cermet composite member and the molded body or the sintered body are filled in a can body so that the molded body or the sintered body made of cermet powder different from A method for producing a cermet composite member, characterized in that pressure sintering is applied by a binder. 8. The method for manufacturing a cermet composite member according to claim 4, wherein the cermet powder is a solution of ceramic powder and metal or alloy powder, and one of which is uniformly dispersed in the other. A method for producing a cermet composite member, which is a composite powder that is supported in a state of being.