High-toughness cadmium-free silver solder and preparation method thereof

A silver solder, high-strength technology, applied in the field of high-strength and tough cadmium-free silver solder and its preparation, can solve the problems of low toughness and fatigue strength, high brazing temperature, containing harmful elements, etc., and achieves good fatigue resistance and brazing. Low temperature, good environmental protection effect

Active Publication Date: 2010-04-14
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of these solders can solve the problem of brazing joint strength but low toughness and fatigue strength; some can solve the problem of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] a, by weight percentage: Ag: 25%; Cu: 32%; Zn: 35%; Ni: 2%; Co: 1%; Mn: 4.75%; B: 0.01%; Nb: 0.01%; V: 0.01 %; Ce: 0.06%; La: 0.09%; Sr: 0.07%;

[0021] B, smelting refractory metal nickel Ni, cobalt Co, vanadium V, niobium Nb and copper Cu respectively to form master alloys A1, A2, A3, A4; Described master alloy A1 is made up of Cu50:Ni50 of weight ratio; The master alloy A2 is composed of Cu70:Co30 by weight ratio; the master alloy A3 is composed of Cu97:V3 by weight ratio; the master alloy A4 is composed of Cu98:Nb2 by weight ratio;

[0022] c, smelting easily oxidizable metals boron B, cerium Ce, lanthanum La, strontium Sr and copper Cu in a vacuum furnace into master alloys B1, B2, B3 respectively; said master alloy B1 is composed of Cu86:B14 in weight ratio; The master alloy B2 is composed of Cu80: La12+Ce8 in weight ratio; the master alloy B3 is composed of Cu80: Sr20 in weight ratio;

[0023] d. Melt the silver and the remaining copper in the intermediate freq...

Embodiment 2

[0027] a, by weight percentage: Ag: 30%; Cu: 26%; Zn: 34%; Ni: 2%; Co: 2%; Mn: 5.8%; B: 0.01%; V: 0.01%; Sr: 0.08 %; Ce: 0.04%; La: 0.06%;

[0028] B, high-melting point metal nickel Ni, cobalt Co, vanadium V are smelted with copper Cu respectively to form master alloy A1, A2, A3; Described master alloy A1 is made up of Cu50:Ni50 of weight ratio; Described master alloy A2 is made up of The composition of Cu70: Co30 of weight ratio; The master alloy A3 is composed of Cu97: V3 of weight ratio;

[0029]c, smelting easily oxidizable metals boron B, cerium Ce, lanthanum La, strontium Sr and copper Cu in a vacuum furnace into master alloys B1, B2, B3 respectively; said master alloy B1 is composed of Cu86:B14 in weight ratio; The master alloy B2 is composed of Cu80:La12+Ce8 in weight ratio; the master alloy B3 is composed of Cu80:Sr20 in weight ratio.

Embodiment 3

[0031] According to weight percentage: Ag: 35%; Cu: 22%; Zn: 32.5%; Ni: 1.5%; Co: 2%; Mn: 6.74%; B: 0.01%; Nb: 0.01%; Ce: 0.06%; La: 0.09%; Sr: 0.09%;

[0032] b. Melting high-melting-point metal nickel Ni, cobalt Co, niobium Nb and copper Cu into master alloys, and melting high-melting-point metal nickel Ni, cobalt Co, niobium Nb and copper Cu into master alloys A1, A2, A4 respectively; The master alloy A1 is composed of Cu50:Ni50 by weight ratio; the master alloy A2 is composed of Cu70:Co30 by weight ratio; the master alloy A4 is composed of Cu98:Nb2 by weight ratio;

[0033] c, smelting easily oxidizable metals boron B, cerium Ce, lanthanum La, strontium Sr and copper Cu in a vacuum furnace into master alloys B1, B2, B3 respectively; said master alloy B1 is composed of Cu86:B14 in weight ratio; The master alloy B2 is composed of Cu80:La12+Ce8 in weight ratio; the master alloy B3 is composed of Cu80:Sr20 in weight ratio.

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PUM

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Abstract

The invention relates to a high-toughness cadmium-free silver solder and a preparation method thereof. The solder comprises the following materials by weight percent: 22-58 percent of Ag, 15-35 percent of Cu, 13-38 percent of Zn, 4-8 percent of Mn, 1.5-5 percent of Ni, 0.8-3 percent of Co, 0.01-0.45 percent of B, 0-1.5 percent of V, 0-1.5 percent of Nb, 0.005-0.9 percent of Ce, 0.005-0.9 percent of La and 0-0.5 percent of Sr. The preparation method comprises the following steps of smelting the metal with high-melting point and partial copper into a preliminary alloy A, smelting oxidized metal and partial copper in a vacuum furnace into a preliminary alloy B, smelting silver and the remained copper in an intermediate-frequency furnace and then adding the preliminary alloy A, adding metals of manganese and zinc and then adding the preliminary alloy B after complete fusion, fusing completely again and standing for 60 minutes, and casting to form a silver alloy ingot, performing even annealing and scaling on the alloy ingot, extruding the alloy into a stripe shape or a bar shape by an isothermal extrusion method, and then rolling into a band or drawing and reducing to a filament.

Description

technical field [0001] The invention relates to a welding material, in particular to a high-strength and tough cadmium-free silver brazing material which is especially suitable for welding diamond composite chips (PDC) and cubic boron nitride composite chips (PCBN) and a preparation method thereof. Background technique [0002] Diamond compact (PDC) and cubic boron nitride compact (PCBN) are increasingly widely used in industrial production and social life. Due to their high hardness, good wear resistance, excellent thermal conductivity and wear resistance, PDC and PCBN The important role in modern industrial materials is irreplaceable. In oil drilling, geological exploration, coal mining, mechanical processing, automobile preparation, cement production, aluminum alloy processing, electronic chips, rubber and plastic engineering, daily necessities, etc., in order to reduce costs, improve efficacy, and enhance safety, PDC and PCBN superhard The material has made gratifying a...

Claims

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Application Information

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IPC IPC(8): B23K35/24B23K35/30B23K35/40C22C1/03
Inventor 龙伟民程亚芳钟素娟于新泉朱坤潘建军裴夤崟杨继东黄成志
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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