Unlock instant, AI-driven research and patent intelligence for your innovation.

Cold-pressing compound forming method of noble/base metal stratified composite material parts

A layered composite material and composite forming technology, applied in metal layered products, metal processing equipment, chemical instruments and methods, etc. Straightforward, short process and cycle, wide range of effects

Inactive Publication Date: 2011-04-20
UNIV OF SCI & TECH BEIJING
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for cold-pressing and composite forming of precious / cheap metal layered composite parts, which solves the problem of complex process, long cycle, serious waste of precious metals, and product failure in the production of precious / cheap metal layered composite parts. Problems such as poor uniformity of interface size, low interface bonding strength, and high production cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Forming of silver / copper laminated composite parts with dimensions of 30×3×1.8mm.

[0027] (1) Machining prepares respectively a pure silver slab of 6.75 × 3 × 1.6mm and a pure copper slab of 6.75 × 3 × 6.4mm;

[0028] (2) Carry out annealing treatment to above-mentioned slab, the pure silver slab annealing temperature is 360 ℃, holding time is 30min, and pure copper slab annealing temperature is 550 ℃, holding time is 30min;

[0029] (3) Treat the surface of the annealed slab to be compounded with a steel brush;

[0030] (4) Put the pure copper slab into the bottom of the mold first, then put the pure silver slab into the mold, and stack it on the pure copper slab;

[0031] (5) Silver / copper laminated slabs are cold-pressed and composite formed, with a reduction rate of 2mm / min and a reduction rate of 75%;

[0032] (6) Take out the compounded silver / copper layered composite material and anneal for 2.5 hours under the protection of hydrogen at 450°C;

[0033] (7) Put...

Embodiment 2

[0036] Forming of AuAg10 alloy / copper layered composite parts with dimensions of 13.6×1.2×2.5mm.

[0037] (1) AuAg10 alloy slabs of 4.2×1.2×1.5mm and pure copper slabs of 4.2×1.2×6.6mm were prepared respectively by machining;

[0038] (2) Carry out annealing treatment to above-mentioned slab, AuAg10 alloy slab annealing temperature is 260 ℃, holding time is 60min, pure copper slab annealing temperature is 450 ℃, holding time is 60min;

[0039] (3) Treat the surface of the annealed slab to be compounded with a steel brush;

[0040] (4) AuAg10 alloy slab is first loaded into the bottom of the mold, and then the pure copper slab is put into the mould, stacked on the AuAg10 alloy slab;

[0041] (5) AuAg10 alloy / copper laminated slabs are cold-pressed and compositely formed to prepare AuAg10 alloy / copper layered composite materials, with a reduction rate of 0.1mm / min and a reduction rate of 65%;

[0042] (6) Take out the compounded AuAg10 alloy / copper layered composite material a...

Embodiment 3

[0046]Forming of silver / copper layered composite parts consisting of two sections with dimensions of 15.75×1.2×2mm and 9×3×2mm.

[0047] (1) Machining prepares a sterling silver slab consisting of two sections with dimensions of 10.5×1.2×0.5mm and 6×3×0.5mm and a silver slab with dimensions of 10.5×1.2×2.5mm and 6×3×2.5mm Two-stage pure copper slab;

[0048] (2) Carry out annealing treatment to above-mentioned slab, and pure silver slab annealing temperature is 300 ℃, and holding time is 40min, and pure copper slab annealing temperature is 500 ℃, and holding time is 40min;

[0049] (3) Treat the surface of the annealed slab to be compounded with a steel brush;

[0050] (4) Put the pure silver slab into the bottom of the mould, then put the pure copper slab into the mold and stack it on the pure silver slab;

[0051] (5) Silver / copper laminated slabs are cold-pressed and composite formed, with a reduction rate of 2mm / min and a reduction rate of 70%;

[0052] (6) Take out the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of metal stratified composite material parts preparation and particularly provides a cold-pressing compound forming method of the noble / base metal stratified composite material parts. The cold-pressing compound forming method is characterized by adopting the base metal as a matrix, the noble metal as a clad material, generating large plastic deformation by virtue of pressure which the noble metal and the base metal subject to in room temperature, generating combination of atoms on interface pure metal by compression splice, and utilizing influencesof stress condition at the contact surface of a composite blank and a die in forming process on the flatness of a composite interface to accomplish cold-pressing compound forming under the constraintof the die, thus directly obtaining the noble / base metal stratified composite material parts with flat interface, high bonding strength, precisely-controlled shape and size, and without flash or burrs. The material has flat interface, high bonding strength, high utilization ratio of noble metal, short production process and period, and wide application range.

Description

technical field [0001] The invention relates to the technical field of preparation of metal layered composite parts, and in particular provides a cold-press composite forming method for precious / cheap metal layered composite parts. Background technique [0002] Precious / cheap metal layered composite parts (such as slip rings, commutator pieces, contacts, etc.) are fully combined with the excellent electrical conductivity, thermal conductivity, chemical stability and low cost of precious metals (such as gold, silver and their alloys). Metals (such as copper, aluminum and their alloys) have good mechanical properties, abundant resources, and low material cost, which not only ensure the excellent electrical conductivity, thermal conductivity, oxidation resistance, and corrosion resistance of the parts, but also improve the overall strength of the parts , and significantly reduce the amount of precious metals, greatly reducing the production cost of parts and components, and are...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B23K20/02B32B15/01
Inventor 刘雪峰李曹兵王璞高小丽谢建新
Owner UNIV OF SCI & TECH BEIJING