LU600603B1 - Niwc25 alloy ceramic and preparation method thereof - Google Patents

Niwc25 alloy ceramic and preparation method thereof

Info

Publication number
LU600603B1
LU600603B1 LU600603A LU600603A LU600603B1 LU 600603 B1 LU600603 B1 LU 600603B1 LU 600603 A LU600603 A LU 600603A LU 600603 A LU600603 A LU 600603A LU 600603 B1 LU600603 B1 LU 600603B1
Authority
LU
Luxembourg
Prior art keywords
powder
niwc25
purity
particle size
alloy ceramic
Prior art date
Application number
LU600603A
Other languages
German (de)
Inventor
Gaosong Li
Original Assignee
Univ Huanghuai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Huanghuai filed Critical Univ Huanghuai
Priority to LU600603A priority Critical patent/LU600603B1/en
Application granted granted Critical
Publication of LU600603B1 publication Critical patent/LU600603B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0433—Nickel- or cobalt-based alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention provides a NiWC25 alloy ceramic and preparation method thereof, belongs to the technical field of surface coating materials. The NiWC25 alloy ceramic of the invention includes the following raw materials in percentage by mass: 23-27 wt% of nano tungsten carbide particles, 5-8 wt% of chromium powder, 3-6 wt% of iron powder, 1-3 wt% of niobium powder, 0.5-1.5 wt% of nano silicon particles, 0.2-0.5 wt% of aluminum powder and 0.05-0.15 wt% of yttrium powder, and rest is nickel powder and inevitable impurities. The invention provides a formula of NiWC25 alloy ceramic and preparation method thereof. Through innovative composition design and process optimization, the problems of residual stress, impurity layer formation, high cost and unstable cladding quality faced by traditional NiWC25 alloy ceramic in laser cladding technology are effectively solved, which provides strong support for the wide application of NiWC25 alloy ceramic.

Description

DESCRIPTION LU600603
NIWC25 ALLOY CERAMIC AND PREPARATION METHOD THEREOF
TECHNICAL FIELD
The invention relates to the technical field of surface coating materials, in particular to a NiWC25 alloy ceramic and preparation method thereof.
BACKGROUND
In the field of material science and engineering technology, NiWC25 alloy ceramic have become an indispensable advanced material in many industrial fields such as machinery manufacturing, aerospace, petrochemical industry and so on because of its unique wear resistance, corrosion resistance and high strength characteristics. However, although NiWC25 alloy ceramic have many advantages, its application in the field of laser cladding technology still faces a series of technical bottlenecks and challenges.
As an advanced surface engineering technology, laser cladding technology can quickly melt and solidify specific alloy powder on the surface of the substrate by high- energy laser beam, forming a coating with excellent performance. However, in the process of laser cladding of NiWC25 alloy ceramic, the difference in thermal properties between the substrate and the cladding layer often leads to large residual stress in the cladding layer; This accumulation of residual stress not only easily leads to microcracks on the surface of the cladding layer, but also seriously reduces the overall mechanical properties and durability of the coating. In addition, the impurity layer formed between cladding layers is also one of the key factors affecting the stability of materials. The existence of impurity layer not only destroys the continuity of cladding layer, but also may lead to the decrease of bonding force between coating and substrate, and then lead to cracking or spalling under stress. With the increase of cladding thickness and area, this stress concentration phenomenon becomes more and more obvious, which seriously threatens the service life and safety of the coating. Moreover, the choice of laser cladding materials is also faced with the dilemma of high cost, especially the high-performance cladding materials such as Co-based alloy, which makes the preparation cost of coating high and limits the application of NIWC25 alloy ceramic in a wider field.
Moreover, in laser cladding technology, the performance of cladding layer depends 500603 not only on the composition of cladding material, but also on the laser process parameters. For example, laser power, scanning speed, powder feeding speed and other parameters will directly affect the microstructure and properties of the cladding layer.
Therefore, when preparing laser cladding materials, it is necessary to comprehensively consider the composition of cladding materials and laser process parameters in order to obtain the best properties of cladding layers.
To sum up, the laser cladding technology of NiWC25 alloy ceramic has a broad application prospect, but there are some problems in the preparation process, such as residual stress, impurity layer formation, high cost and unstable cladding quality, which need to be solved urgently through technological innovation and process optimization.
Therefore, it is of great significance to develop a high-efficiency, low-cost and high-quality
NiWC25 alloy ceramic and its preparation method for promoting the wide application of this material in more fields.
SUMMARY
The invention aims to provide a NiWC25 alloy ceramic and preparation method thereof, so as to solve the above problems in the background technology. The invention provides a formula of NiWC25 alloy ceramic and preparation method thereof, through innovative composition design and process optimization, the problems of residual stress, impurity layer formation, high cost and unstable cladding quality faced by traditional
NiWC25 alloy ceramic in laser cladding technology are effectively solved, which provides strong support for the wide application of NiIWC25 alloy ceramic.
In order to achieve the above purpose, the present invention provides the following technical schemes: one of the technical schemes of the invention is to provide a NiWC25 alloy ceramic, includes following raw materials in percentage by mass: 23-27 wt% of nano tungsten carbide particles, 5-8 wt% of chromium powder, 3-6 wt% of iron powder, 1-3 wt% of niobium powder, 0.5-1.5 wt% of nano silicon particles, 0.2-0.5 wt% of aluminum powder and 0.05-0.15 wt% of yttrium powder, and rest is nickel powder and inevitable impurities; preferably, addition amount of the yttrium powder is 0.13 wt%; preferably, purity of the nano tungsten carbide particles is = 99.5%, and particle size range is 0.5-5 um;
purity of the chromium powder is = 99.0%, and particle size range is 2-10 um; LU600603 purity of the iron powder is = 98.5%, and particle size range is 0.5-3 um; purity of the niobium powder is = 99.0%, and particle size range is 0.1-1 um; purity of the nano silicon particles is = 99.9%, and particle size range is 5-20nm; purity of the aluminum powder is = 99.5%, and particle size range is 10-50 nm; purity of the yttrium powder is = 99.99%, and particle size range is 0.05-0.2 um; purity of the nickel powder is = 99.9%, and particle size range is 1-5 um; preferably, consists of following components in percentage by mass: wt% of the nano tungsten carbide particles, 7.5 wt% of the chromium powder, 5 wt% of the iron powder, 2 wt% of the niobium powder, 1.5 wt% of the nano silicon particles, 0.4 wt% of the aluminum powder and 0.13 wt% of the yttrium powder, and rest is the nickel powder and the inevitable impurities; another of the technical schemes of the invention is to provide a preparation method of the NiWC25 alloy ceramic, includes following steps: weighing the raw materials in proportion and mixing evenly, and then sending raw material system to area to be clad of base material through a nozzle in a protective atmosphere, and carrying out laser cladding treatment to form a surface coating metallurgically combined with the base material preferably, the base material is a base material preheated to 270-350°C; preferably, the protective atmosphere is argon atmosphere or nitrogen atmosphere; preferably, parameters of the laser cladding treatment are: powder feeding pressure is 0.27-0.32 MPa, powder feeding rate is 7-15 g/min, power density of laser beam is 5x107
W/cm, and scanning speed is 5-50 mm/s.
In the raw material system of NiWC25 alloy ceramic, nickel can provide good toughness and plasticity, and tungsten carbide can provide excellent hardness and wear resistance; The addition of chromium can enhance the corrosion resistance and heat resistance of the material; The addition of iron can improve the processability of the material and reduce the cost; Niobium is used to refine grains and improve the strength and toughness of materials; Silicon is used to improve the oxidation resistance and thermal shock resistance of materials; Aluminum further enhances the corrosion resistance of the product by interacting with chromium in raw materials; Yttrium, as a rare earth element, plays a role in purifying grain boundaries and reducing the tendency of cracks.
The beneficial technical effects of the invention are as follows: LU600603 the invention provides a formula of NiWC25 alloy ceramic and preparation method thereof, through innovative composition design and process optimization, the problems of residual stress, impurity layer formation, high cost and unstable cladding quality faced by traditional NiWC25 alloy ceramic in laser cladding technology are effectively solved, which provides strong support for the wide application of NiWC25 alloy ceramic;
by accurately controlling the proportion of raw materials and introducing beneficial elements such as niobium, silicon and aluminum, the invention not only optimizes the microstructure of NiWC25 alloy ceramic, but also significantly improves its hardness, wear resistance, corrosion resistance and heat resistance, while maintaining good toughness and plasticity, the addition of yttrium as a rare earth element effectively purifies the grain boundary, reduces the crack tendency of the cladding layer caused by thermal stress during laser cladding, and improves the overall stability and service life of the cladding layer.
DESCRIPTION OF THE INVENTION LU600603
A number of exemplary embodiments of the present invention will now be described in detail, and this detailed description should not be considered as a limitation of the present invention, but should be understood as a more detailed description of certain aspects, characteristics and embodiments of the present invention. It should be understood that the terminology described in the present invention is only for describing specific embodiments and is not used to limit the present invention.
In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper limit and the lower limit of the range is also specifically disclosed. Intermediate values within any stated value or stated range, as well as each smaller range between any other stated value or intermediate values within the stated range are also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded from the range.
Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention relates. Although the present invention only describes the preferred methods and materials, any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present invention.
The terms "including", "comprising", "having" and "containing" used in the present invention are all open terms, which means including but not limited to.
The purity of nano tungsten carbide particles used in the following embodiments of the invention is = 99.5%, and particle size range is 0.5-5 um; purity of the chromium powder used is = 99.0%, and particle size range is 2-10 um; purity of the iron powder used is = 98.5%, and particle size range is 0.5-3 um; purity of the niobium powder used is = 99.0%, and particle size range is 0.1-1 um; purity of the nano silicon particles used is = 99.9%, and particle size range is 5-20nm; purity of the aluminum powder used is = 99.5%, and particle size range is 10-50 nm; purity of the yttrium powder used is = 99.99%, and particle size range is 0.05-0.2 um; purity of the nickel powder used is = 99.9%, and particle size range is 1-5 um.
Unless otherwise specified, "room temperature" in the present invention is 10-30°C.
The raw materials used in the following embodiments of the invention are all commercially available products.
Embodiment 1 LU600603
A NiWC25 alloy ceramic, includes following raw materials in percentage by mass: wt% of nano tungsten carbide particles, 7.5 wt% of chromium powder, 5 wt% of iron powder, 2 wt% of niobium powder, 1.5 wt% of nano silicon particles, 0.4 wt% of aluminum powder and 0.13 wt% of yttrium powder, and rest is nickel powder and inevitable impurities.
The specific preparation method includes following steps: accurately weighing the raw materials according to the above formula ratio, mixing them evenly in a high-speed mixer to ensure no agglomeration, then sending the evenly mixed raw material system to the area to be clad of the base material (Q235 carbon steel base) preheated to 300°C through a coaxial nozzle under the protection of argon atmosphere, and carrying out laser cladding treatment according to the preset cladding path to form a dense cladding layer which is metallurgically combined with the base material; the parameters of laser cladding treatment are set as follows: powder feeding pressure is 0.3 MPa, powder feeding rate is 10 g/min, laser beam power density is 5x107
W/cm, and scanning speed is 25 mm/s, after cladding, cooling the workpiece naturally to room temperature, and then removing the surface defects by surface grinding treatment to obtain the final product, observing the cross section of cladding layer by metallographic microscope, and no obvious cracks appear, so the quality of cladding layer is stable.
Embodiment 2
A NiWC25 alloy ceramic, includes following raw materials in percentage by mass: 24 wt% of nano tungsten carbide particles, 8 wt% of chromium powder, 6 wt% of iron powder, 1.5 wt% of niobium powder, 1 wt% of nano silicon particles, 0.4 wt% of aluminum powder and 0.11 wt% of yttrium powder, and rest is nickel powder and inevitable impurities.
The specific preparation method includes following steps: accurately weighing the raw materials according to the above formula ratio, mixing them evenly in a high-speed mixer to ensure no agglomeration, then sending the evenly mixed raw material system to the area to be clad of the base material (Q235 carbon steel base) preheated to 350°C through a coaxial nozzle under the protection of argon atmosphere, and carrying out laser cladding treatment according to the preset cladding path to form a dense cladding layer which is metallurgically combined with the base material; the parameters of laser cladding treatment are set as follows:
powder feeding pressure is 0.28 MPa, powder feeding rate is 15 g/min, laser beam 0503 power density is 5x10” W/cm, and scanning speed is 35 mm/s, after cladding, cooling the workpiece naturally to room temperature, and then removing the surface defects by surface grinding treatment to obtain the final product, observing the cross section of cladding layer by metallographic microscope, and no obvious cracks appear, so the quality of cladding layer is stable.
Embodiment 3
A NiWC25 alloy ceramic, includes following raw materials in percentage by mass: 23 wt% of nano tungsten carbide particles, 6 wt% of chromium powder, 4 wt% of iron powder, 2.5 wt% of niobium powder, 1 wt% of nano silicon particles, 0.3 wt% of aluminum powder and 0.13 wt% of yttrium powder, and rest is nickel powder and inevitable impurities.
The specific preparation method includes following steps: accurately weighing the raw materials according to the above formula ratio, mixing them evenly in a high-speed mixer to ensure no agglomeration, then sending the evenly mixed raw material system to the area to be clad of the base material (Q235 carbon steel base) preheated to 310°C through a coaxial nozzle under the protection of argon atmosphere, and carrying out laser cladding treatment according to the preset cladding path to form a dense cladding layer which is metallurgically combined with the base material; the parameters of laser cladding treatment are set as follows: powder feeding pressure is 0.27 MPa, powder feeding rate is 14 g/min, laser beam power density is 5x10’
W/cm, and scanning speed is 30 mm/s, after cladding, cooling the workpiece naturally to room temperature, and then removing the surface defects by surface grinding treatment to obtain the final product, observing the cross section of cladding layer by metallographic microscope, and no obvious cracks appear, so the quality of cladding layer is stable.
Effect verification
The products after laser cladding treatment in Embodiments 1-3 are tested for the following properties: 1, hardness test: using Vickers hardness tester to test the hardness of the surface coating, the test results are shown in Table 1; 2, bonding strength test: using tensile testing machine to test the bonding strength between coating and substrate, the test results are shown in Table 1;
3, dry wear test: using friction and wear tester to carrying out dry wear test on 2600603 coating, the test conditions are as follows: the grinding material is GCr15 steel ball, the load is 50 N, the rotating speed is 200 rpm, the test time is 60 min, and the evaluation index is wear amount (mg), the test results are shown in Table 1.
Table 1
Wearing capacity | Bonding strength
Surface hardness eee a
The above-mentioned embodiments only describe the preferred mode of the invention, and do not limit the scope of the invention. Under the premise of not departing from the design spirit of the invention, various modifications and improvements made by ordinary technicians in the field to the technical scheme of the invention shall fall within the protection scope determined by the claims of the invention.

Claims (8)

1. A NiWC25 alloy ceramic, characterized in that comprises following raw materials in percentage by mass: 23-27 wt% of nano tungsten carbide particles, 5-8 wt% of chromium powder, 3-6 wt% of iron powder, 1-3 wt% of niobium powder, 0.5-1.5 wt% of nano silicon particles, 0.2-0.5 wt% of aluminum powder and 0.05-0.15 wt% of yttrium powder, and rest is nickel powder and inevitable impurities.
2. The NiWC25 alloy ceramic according to claim 1, characterized in that addition amount of the yttrium powder is 0.13 wt%.
3. The NiWC25 alloy ceramic according to claim 1, characterized in that purity of the nano tungsten carbide particles is = 99.5%, and particle size range is 0.5-5 um; purity of the chromium powder is = 99.0%, and particle size range is 2-10 um; purity of the iron powder is = 98.5%, and particle size range is 0.5-3 um; purity of the niobium powder is = 99.0%, and particle size range is 0.1-1 um; purity of the nano silicon particles is = 99.9%, and particle size range is 5-20nm; purity of the aluminum powder is = 99.5%, and particle size range is 10-50 nm; purity of the yttrium powder is = 99.99%, and particle size range is 0.05-0.2 um; purity of the nickel powder is = 99.9%, and particle size range is 1-5 um.
4. The NiWC25 alloy ceramic according to claim 1, characterized in that consists of following components in percentage by mass: wt% of the nano tungsten carbide particles, 7.5 wt% of the chromium powder, 5 wt% of the iron powder, 2 wt% of the niobium powder, 1.5 wt% of the nano silicon particles, 0.4 wt% of the aluminum powder and 0.13 wt% of the yttrium powder, and rest is the nickel powder and the inevitable impurities.
5. A preparation method of the NiWC25 alloy ceramic according to claim 1 600603 characterized in that comprises following steps: weighing the raw materials in proportion and mixing evenly, and then sending raw material system to area to be clad of base material through a nozzle in a protective atmosphere, and carrying out laser cladding treatment to form a surface coating metallurgically combined with the base material.
6. The preparation method according to claim 5, characterized in that the base material is a base material preheated to 270-350°C.
7. The preparation method according to claim 5, characterized in that the protective atmosphere is argon atmosphere or nitrogen atmosphere.
8. The preparation method according to claim 5, characterized in that parameters of the laser cladding treatment are: powder feeding pressure is 0.27-0.32 MPa, powder feeding rate is 7-15 g/min, power density of laser beam is 5x10” W/cm, and scanning speed is 5-50 mm/s.
LU600603A 2025-03-17 2025-03-17 Niwc25 alloy ceramic and preparation method thereof LU600603B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
LU600603A LU600603B1 (en) 2025-03-17 2025-03-17 Niwc25 alloy ceramic and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU600603A LU600603B1 (en) 2025-03-17 2025-03-17 Niwc25 alloy ceramic and preparation method thereof

Publications (1)

Publication Number Publication Date
LU600603B1 true LU600603B1 (en) 2025-09-17

Family

ID=97067648

Family Applications (1)

Application Number Title Priority Date Filing Date
LU600603A LU600603B1 (en) 2025-03-17 2025-03-17 Niwc25 alloy ceramic and preparation method thereof

Country Status (1)

Country Link
LU (1) LU600603B1 (en)

Similar Documents

Publication Publication Date Title
AU2010279557B2 (en) Tough coated hard particles consolidated in a tough matrix material
CN109097708B (en) Method for improving surface performance of single-phase high-entropy alloy
CN116855937B (en) Cutting pick and method for preparing cutting pick by laser cladding
CN110923707B (en) Titanium alloy surface high-temperature-resistant composite coating material based on laser cladding
CN118875287B (en) An ultrafine cemented carbide tool with a high entropy alloy binder phase and a preparation method thereof
CN111719147A (en) A kind of material suitable for 35CrMnSiA and 42CrMo pick remanufacturing and laser cladding method
US3180012A (en) Cobalt alloys
LU600603B1 (en) Niwc25 alloy ceramic and preparation method thereof
CN117123797B (en) Methods and applications of high magnesium doping additive manufacturing of nickel-based superalloy materials
KR100561610B1 (en) Corrosion-resistant alloys, methods of making corrosion-resistant alloys and articles made of such alloys
LU600599B1 (en) Laser cladding material based on ni60aa and wc and preparation method thereof
LU600601B1 (en) Laser cladding niwc25 alloy powder and preparation method thereof
JPH04254543A (en) Cobalt-base alloy having corrosion resistance and wear resistance
CN118559021B (en) Composite powder and its preparation method and application
CN1280439C (en) Carbide reinforced nickel-aluminum base composite high-temperature anti-abrasion material
CN118374713B (en) High-strength high-toughness hard alloy and preparation method and application thereof
LU600597B1 (en) Laser cladding nickel-based alloy coating with high wear resistance and preparation method thereof
CN116891970B (en) Creep-resistant iron-nickel-based superalloy and preparation method thereof
CN111041471A (en) Cladding layer of valve sealing surface
CN114477999B (en) Preparation method of thermal shock resistant Al2TiO5-Ti3AlC2 ceramic
JPH0195896A (en) Composite welding material for weld overlay
CN120272906A (en) High-entropy alloy coating and preparation method and application thereof
CN121776731A (en) A MAB-phase reinforced Cu-Sn-Ti active solder and its preparation method
CN121992269A (en) A self-healing cermet tool material for cast iron machining and its preparation method
CN120625033A (en) A method for carbon-regulated phase transformation and defect repair of FeCoCrNiAlTi high-entropy alloy coatings

Legal Events

Date Code Title Description
FG Patent granted

Effective date: 20250917