High-conductivity high-elasticity palladium-based alloy, heat treatment process and application

Abstract

The invention discloses a high-conductivity high-elasticity palladium-based alloy, a heat treatment process and application. The palladium-based alloy comprises, by mass, 40-60 wt.% of Pd, 25-45 wt.%of Cu, 5-15 wt.% of Ag, 1.5-5 wt.% of Ru and 0-2.0 wt.% of modified elements, wherein the modified elements are one or two of La, Ce, Gd, Y, Ga, Zr and B. The heat treatment process comprises the steps of carrying out burdening, carrying out smelting, carrying out casting, carrying out rolling, carrying out annealing, carrying out drawing and carrying out intermediate annealing, and after the intermediate annealing step is completed, aging solution strengthening treatment needs to be carried out on a prepared alloy wire. The conductivity of the palladium-based alloy ranges from 15% to 25%IACS,the elasticity modulus ranges from 115 GPa to 125GPa, the hardness Hv0.1 ranges from 360 to 460, the resistance temperature coefficient ranges from 2.0 to 4.0x10<-4>K<-1>, the yield strength ranges from 1075 MPa to 1125MPa, and the ductility ranges from 2% to 10%. The high-conductivity high-elasticity palladium-based alloy can be used for a micromotor electric brush wire, a potentiometer electricbrush wire and a semiconductor test probe, wherein the probe can be a Cobra probe or a cantilever type probe or a vertical type probe or a spring type probe.

Description

technical field [0001] The invention relates to the technical field of electrical contact metal materials, in particular to a high-conductivity and high-elasticity palladium-based alloy, heat treatment process and application. Background technique [0002] Micro motors, elastic brushes for precision potentiometers, semiconductor test probes and potentiometric sensors require alloys to have both excellent electrical contact performance, high elasticity and wear resistance, and precious metal alloys can meet these special requirements. Therefore, multi-component alloys containing precious metal elements are widely used all over the world, the most famous of which is Palliney TM 7. A six-element alloy whose composition is 35Pd-10Au-10Pt-30Ag-14Cu-1Znwt.%. However, the conductivity of this alloy is very low, about 5.5% IACS. It is difficult to meet the continuous and rapid shrinking device size and increasing processing capacity in the field of semiconductor manufacturing, tha...

AI Technical Summary

Problems solved by technology

It is difficult to meet the continuous and rapid shrinking device size and increasing processing capacity in the field of semiconductor manufacturing, that is, a higher number of transistors per unit area and faster processing speed; at the same time, micro-motors and precision potentiometers are moving towards miniaturization and light weight , The trend of high-speed development also puts forward higher requirements for brush materials

Commercial Alloy Paliney TM H3C and Paliney TM C has Paliney TM 7 Nearly three times the conductivity value, but lacks the ampacity required for many new applications, and the alloys are difficult to machine into complex, high-tolerance shapes in the fully age-hardened condition