JPH0573512B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to a method for manufacturing conductive overhead wire materials that require wear resistance in parts, such as overhead wires for monorails, vehicle pantograph overhead wires, etc. Conventional technology For example, overhead wire materials such as monorail overhead wires must be made of conductive material in order to supply electricity to the vehicle side, and because they come into sliding contact with the current collector on the vehicle side, the sliding contact portion is It is required to have excellent wear resistance. For this reason, conventionally, as shown in Fig. 1, a monorail overhead wire 1 has a wire-shaped base material 2 made of an extruded aluminum material with a fitting portion at the sliding contact portion, and a sliding member made of SUS304 with excellent wear resistance. 3 is press-fitted into the fitting portion and attached integrally. Problems to be Solved by the Invention However, the overhead wire material as described above has the disadvantage that it is not easy to press-fit the sliding member into the base material, resulting in high costs. Furthermore, since the base material and sliding member are mechanically joined, the joint strength is low, and the overhead wire is generally long, several tens of meters, so it is necessary to ensure the dimensional accuracy of the base material and sliding member. It is difficult to
For this reason, there was a problem in that gaps were formed at the interface between the two after fitting, resulting in deterioration of durability due to corrosion between the gaps. Furthermore, since SUS is used for the sliding member, it has good wear resistance, but due to its high electrical resistance, the sliding member generates heat, resulting in large power loss and poor conduction efficiency. Such drawbacks occur not only in monorail overhead wires but also in other conductive overhead wire materials. The present invention has been made in view of the above technical background, and it is an object of the present invention to provide an overhead wire material having excellent wear resistance and conductivity without the above-mentioned drawbacks at a low cost. Means for Solving the Problems In order to achieve the above object, the present invention provides an aluminum alloy filler material with excellent wear resistance and electrical conductivity in areas on the surface of the base material where wear resistance and electrical conductivity are required. It is characterized by overlay welding. That is, more specifically, it contains Ni: 5 to 30 wt%,
Aluminum alloy filler material with the balance consisting of aluminum and unavoidable impurities, or Ni: 5~
Contains 30wt%, further Si: 0.05~30wt%,
Fe: 0.05~30wt%, Mn: 0.01~30wt%, Cr:
0.01-30wt%, Ti: 0.005-10wt%, B: 0.0001
~10wt%, Zr: 0.005~10wt%, V: 0.005~5wt
Aluminum alloy filler material containing one or more types of Ni in a total amount of 50wt% or less including Ni content, with the balance consisting of aluminum and inevitable impurities, or Ni: 5 to 30wt%,
Aluminum alloy filler metal containing Cu: 0.05 to 30 wt% in a total range of 50 wt% or less, with the remainder consisting of aluminum and unavoidable impurities, or Ni 5 to 30 wt% and Cu: 0.05 to 30 wt%. ,
Furthermore, Si: 0.05-30wt%, Fe: 0.05-30wt%,
Mn: 0.01~30t%, Cr: 0.01~30wt%, Ti:
0.005~10wt%, B: 0.0001~10wt%, Zr: 0.005
~10wt%, V: 0.005~5wt%, one or more types, including Ni and Cu content, totaling 50wt%
It is characterized by using an aluminum alloy filler metal containing the following content, the remainder consisting of aluminum and unavoidable impurities, and welding the filler metal to any surface of the overhead wire base material made of aluminum or aluminum alloy. It is something to do. It is an essential additive element for aluminum alloy filler metal.
Ni contributes to improving the wear resistance of the welded part after welding to the filler metal and eventually to the base metal.
However, if the Ni content in the additive is less than 5 wt%, the effect is poor, and if it exceeds 30 wt%, extrusion processing becomes difficult, leading to drawbacks such as cracking. Particularly preferable Ni content range is 10~
It is 25wt%. Cu, which is an optionally added element, contributes, like Ni, to improving wear resistance, as well as improving the strength and conductivity of the welded part. However, if the Cu content in the filler metal is less than 0.05wt%, the above effects will be poor, and if it exceeds 30wt% or the total content of Ni and Cu exceeds 50wt%, coarse crystallized substances will be produced. This results in performance deterioration. A particularly preferable Cu content range is 3 to 10 wt%. Furthermore, 0.05 to 7 wt% of Zn may be contained in order to similarly improve strength. In addition to the above, optionally added to the filler metal
By containing Si, Fe, Mn, Cr, Ti, B, Zr, and V together with Ni, they contribute to improving the wear resistance and hardness of the filler metal and ultimately of the welded part.
They are equivalent in this respect. Therefore, it is sufficient if one or more of these elements are contained, but if the content of each element in the filler metal is less than 1wt%, these effects will be poor, and conversely, if the content of each element exceeds the upper limit or Ni If the total content, including Cu content, exceeds 50 wt%, extrusion processing becomes difficult, resulting in defects such as cracking. A particularly preferable content range is Si: 5 to 15 wt%;
Fe: 1-3wt%, Mn: 1-3wt%, Cr: 1-3wt
%, Ti: 5-10wt%, B: 1-5wt%, Zr: 1
~5wt%, V: 1~3wt%. The composition of aluminum or its alloy used for the base material is not particularly limited, but it is preferably pure aluminum of the A1000 series, which has particularly high conductivity among aluminum or its alloys.
It is preferable to use A6000 series aluminum alloy. The build-up welding of the filler metal to the base material is carried out at locations where wear resistance and electrical conductivity are required. This overlay welding may be performed by high-heat energy welding such as MIG welding, TIG welding, electron beam welding, laser welding, plasma welding, or the like. Welding conditions may be appropriately selected according to conventional methods, and it is desirable to groove the base material prior to welding. Furthermore, after welding, surface finishing processing may be carried out if necessary. Effects of the Invention As described above, the present invention uses an aluminum alloy filler material containing predetermined elements and having excellent wear resistance and electrical conductivity. This is then overlaid and welded to the parts of a base material made of aluminum or its alloy where wear resistance and electrical conductivity are required to form an overhead wire material. Therefore, the overlay welded part has excellent abrasion resistance, so it is similar to the conventional case where sliding members such as SUS304, which have excellent abrasion resistance, are integrally attached by rolling fitting. There is no manufacturing difficulty, and the sliding parts etc. can be easily manufactured by welding, and manufacturing costs can be reduced. Moreover, the interface between the weld and the base metal becomes alloyed and forms a physicochemical bond.
Unlike mechanical joining by fitting, the bonding strength is extremely high, and since there is no gap between the two, there is no risk of corrosion between the gaps, and the durability of the overhead wire material can be improved. Furthermore, since the filler metal is an aluminum alloy containing a predetermined amount of Ni, the welded portion and the entire overhead wire material can be made to have excellent electrical conductivity, and power loss due to heat generation can be suppressed. As described above, according to the present invention, an aluminum overhead wire material having excellent wear resistance and conductivity can be manufactured at low cost. Examples Next, examples of the present invention will be shown. Made of A6063 aluminum alloy, length 300mm, width
A plate material of 100 mm and wall thickness of 6 mm was used as the base material of the overhead wire material.
After performing groove processing on the surface of this base material, various aluminum alloy filler metals having the compositions shown in Table 1 below were overlay-welded. The filler metal has a diameter of 1.6
A round bar of mm diameter was used after extrusion and drawing.
In addition, overlay welding was performed by MIG welding.

【table】

[Table] After finishing the surface of each sample No. 1 to No. 17 obtained above, the electrical conductivity and hardness of the welded portion were measured, and a wear resistance test was conducted. The conductivity was measured using a conductivity meter with the conductivity of Cu as 100%, and the hardness was expressed as Vickers hardness (Hv) (load: 5 kg). In addition, the abrasion resistance test was conducted using a dry Ohkoshi type abrasion resistance tester.
The test was carried out under the test conditions of FC-30 and wear rate: 2 m/sec, and the specific wear amount of the welded part was measured. The results are shown in Table 2 below.

【table】

[Table] On the other hand, conventionally used as sliding members, etc.
When the conductivity of SUS304 was similarly measured, the electrical resistance was too large to be measured using the above conductivity meter. By the way, the specific resistance of SUS304 was 7.4×10 ^-6 μΩ・cm. When the hardness was measured, it was Hv170. From the above results, it has been confirmed that, according to the present invention, an overhead wire material having excellent welded portions in both electrical conductivity and wear resistance can be easily manufactured by welding.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional perspective view showing a conventional monorail overhead wire member. 1... Catenary wire material, 2... Base material, 3... Sliding member.

Claims (1)

[Claims] 1. Using an aluminum alloy filler metal containing 5 to 30 wt% of Ni, with the remainder consisting of aluminum and unavoidable impurities, the filler metal is applied to the desired base material of aluminum or an aluminum alloy. A method for manufacturing a conductive overhead wire material with excellent wear resistance, which is characterized by overlay welding on the surface of the conductive wire material. 2 Contains Ni: 5 to 30 wt%, and further contains Si: 0.05
~30wt%, Fe: 0.05~30wt%, Mn: 0.01~30wt
%, Cr: 0.01~30wt%, Ti: 0.005~10wt%,
B: 0.0001-10wt%, Zr: 0.005-10wt%, V:
Using an aluminum alloy filler material containing one or more of 0.005 to 5 wt% in a total range of 50 wt% or less including Ni content, and the remainder consisting of aluminum and unavoidable impurities, the filler material is , characterized by overlay welding on the desired surface of a base material made of aluminum or aluminum alloy,
A method for manufacturing conductive overhead wire material with excellent wear resistance. 3 Using an aluminum alloy filler material containing Ni: 5 to 30 wt% and Cu: 0.05 to 30 wt% in a total range of 50 wt% or less, and the remainder consisting of aluminum and unavoidable impurities, the filler material is A method for manufacturing a conductive overhead wire material with excellent wear resistance, which is characterized by overlay welding on the desired surface of a base material made of aluminum or an aluminum alloy. 4 Contains Ni: 5 to 30 wt%, Cu: 0.05 to 30 wt%, furthermore Si: 0.05 to 30 wt%, Fe: 0.05 to 30 wt%.
%, Mn: 0.01~30wt%, Cr: 0.01~30wt%,
Ti: 0.005-10wt%, B: 0.0001-10wt%, Zr:
0.005~10wt%, V: 0.005~5wt%, one or more types in total including Ni and Cu content
Using an aluminum alloy filler metal containing 50wt% or less with the remainder consisting of aluminum and unavoidable impurities, welding the filler metal onto the desired surface of a base material made of aluminum or an aluminum alloy. A method for manufacturing a conductive overhead wire material with excellent wear resistance.