A kind of highly conductive and highly elastic palladium-based alloy, heat treatment process and application

Abstract

The invention discloses a high-conductivity and high-elasticity palladium-based alloy, heat treatment process and application. The palladium-based alloy includes 40-60wt.% of Pd, 25-45wt.% of Cu, and 5-15wt.% of Ag , 1.5-5wt.% of Ru and 0-2.0wt.% of modifying elements, wherein the modifying elements are one or two of La, Ce, Gd, Y, Ga, Zr and B. The heat treatment process includes the steps of batching, smelting, casting, rolling, annealing, drawing and intermediate annealing. After the intermediate annealing step is completed, the obtained alloy wire needs to be subjected to aging solid solution strengthening treatment. The electrical conductivity of the palladium-based alloy is between 15-25% IACS, the elastic modulus is between 115-125GPa, and the hardness Hv 0.1 Between 360 and 460, the temperature coefficient of resistance is 2.0 to 4.0×10 ‑4 K ‑1 Between, yield strength between 1075 ~ 1125MPa, elongation between 2 ~ 10%. It can be used for brush wires of micro motors, brush wires of potentiometers and semiconductor test probes, wherein the probes can be Cobra probes, cantilever probes, vertical probes or spring probes.

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