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Welding method of aluminum oxide copper and steel and application of method

A technology of aluminum oxide copper and welding methods, applied in welding equipment, welding/welding/cutting items, non-electric welding equipment, etc., can solve the problems of restricted, difficult high-strength, high-temperature-resistant bonding interface, etc., and achieve less defects in the welding interface , high reliability of welding quality and high flexibility

Active Publication Date: 2020-05-22
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the hindering effect of alumina particles, it is difficult to form a high-strength, high-temperature-resistant bonding interface between alumina dispersion-strengthened copper and solid steel (40CrNiMoA), and its application in high-speed motor rotors is also restricted.

Method used

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  • Welding method of aluminum oxide copper and steel and application of method
  • Welding method of aluminum oxide copper and steel and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Grind the surface of the 40CrNiMoA steel core with an 80-mesh grinding wheel, remove a thickness of 0.3mm, wash it with deionized water, and dry it in a vacuum oven at 80°C; use alumina copper powder with a particle size of ≤74 microns and a mass content of 0.3% of alumina Fill to 20mm in the rubber mold, then put the treated solid steel core into the middle of the rubber mold, fill the rubber mold with alumina copper powder and vibrate, then put the sealed rubber mold into the cold isostatic press, Hold the pressure for 5 minutes at a pressure of 180MPa; put the billet after cold isostatic pressing into a steel sheath, seal it with vacuum heat degassing, and then put it into a hot isostatic pressing furnace. 900 ℃ for 3 hours; machining to remove the steel jacket, processed into figure 1 Standard tensile specimens are shown. The conductivity and hardness of the alumina-copper end and the interface strength between the alumina-copper and the steel core at 200°C are sho...

Embodiment 2

[0057] Grind the surface of the 40CrNiMoA steel core with a 100-mesh grinding wheel, remove a thickness of 0.3mm, wash it with deionized water, and dry it in a vacuum oven at 80°C; put alumina copper powder with a particle size of ≤74 microns and a mass content of 0.5% of alumina Fill to 20mm in the rubber mold, then put the treated solid steel core into the middle of the rubber mold, fill the rubber mold with alumina copper powder and vibrate, then put the sealed rubber mold into the cold isostatic press, Hold the pressure for 5 minutes at a pressure of 180MPa; put the billet after cold isostatic pressing into a steel sheath, seal it with vacuum heat degassing, and then put it into a hot isostatic pressing furnace. Insulate at 950°C for 3 hours; remove the steel sheath by machining, and process it into a standard tensile specimen. The conductivity and hardness of the alumina-copper end and the interface strength between the alumina-copper and the steel core at 200°C are shown...

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Abstract

The invention discloses a welding method of aluminum oxide copper and steel and application of the method, and relates to the technical field of powder metallurgy. The welding method comprises the steps that cold isostatic pressing molding is carried out on a mold filled with a solid steel core and aluminum oxide copper powder, and then a cold pressed blank is taken out; the cold pressed blank isplaced into a package sheathing and is subjected to hot isostatic pressing molding, and then the package sheathing is removed; and the aluminum oxide copper powder is at least in contact with one endsurface of the solid steel core. According to the welding method of the aluminum oxide copper, the welding of the aluminum oxide copper and a solid steel body can be realized, meanwhile, a high-strength high-temperature-resistance welding interface can be obtained, the process stability is good, the welding interface is less in defects, welding quality reliability is high, and prepared weldments can be widely used in high-speed motor rotors.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a welding method of aluminum oxide copper and steel and its application. Background technique [0002] Al 2 o 3 Strengthening Phase Al in Dispersion Strengthened Copper Alloys 2 o 3 The particles are uniformly dispersed in the copper matrix with nanometer size, and will not dissolve or coarsen at high temperatures close to the melting point of the copper matrix. Therefore, the alloy has high strength and high electrical conductivity, good resistance to high temperature softening and excellent high temperature stability. It is an excellent electrical material. [0003] High-speed motors have the advantages of high speed, high power density, high reliability, small size, low noise, high efficiency, low maintenance cost, and easy direct drive. They have broad application prospects in high-end equipment, national defense, environmental protection, energy and other field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/02B23K20/26B23K20/227B23K103/18
CPCB23K20/021B23K20/227B23K20/26B23K2103/18
Inventor 闫志巧陈峰
Owner GUANGDONG INST OF NEW MATERIALS