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Palladium vanadium precision high-resistance alloy and preparation method thereof

A high-resistance alloy and vanadium alloy technology, applied in the field of metal materials, can solve the problems that have not been reported in the literature, and achieve the effects of excellent comprehensive performance, increased resistivity, and reduced resistivity

Active Publication Date: 2019-11-12
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The performance and preparation of palladium-vanadium alloy with a V content greater than 15% as a precision resistance material has not been reported in the literature at home and abroad so far.

Method used

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  • Palladium vanadium precision high-resistance alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Each component of the alloy is formulated according to the mass percentage of 29% V, 2% Cr, 1% Ru, 1% Al, and the rest of Pd; it is melted with a high-purity alumina crucible and a high-frequency induction furnace, and the melting chamber is first melted Vacuum to 0.1×10 -4 Pa, filled with high-purity argon (99.999%, volume fraction) to positive pressure, the alloy is fully degassed in the molten state and cast in a crystallization mold, and the ingot is subjected to a homogenization heat treatment at 1200 ° C for 5 hours under argon protection; after 1200 ℃ Forging, rolling, thick wire drawing, and intermediate annealing adopt 1000 ℃ heat preservation for 50 minutes to quickly cool out of the furnace, multi-mode fine drawing to prepare wires with a diameter of Φ0.030mm; carry out 600 ℃ argon protection, heat preservation for 60 minutes and slow down with the furnace Cold short-range order transformation heat treatment.

[0024] Properties of PdV29Cr2Ru1Al1 alloy: resi...

Embodiment 2

[0026] Each component of the alloy is formulated according to the ingredients of 31% V, 2% Cr, 2% Al, and the balance of Pd; it is melted with a high-purity alumina crucible and a high-frequency induction furnace, and the melting chamber is first evacuated to 0.2×10 -4 Pa, filled with high-purity argon (99.999%, volume fraction) to positive pressure, the alloy is fully degassed in the molten state and cast in a crystallization mold, and the ingot is subjected to a homogenization heat treatment at 1250 ° C for 5 hours under argon protection; after 1200 ℃ Forging, rolling, drawing of thick wire, and intermediate annealing are carried out with 1000 ℃ argon protection and heat preservation for 60 minutes. Short-range orderly transformation heat treatment with furnace slow cooling in minutes.

[0027] Properties of PdV31Cr2Al2 alloy: resistivity 203.8μΩ·cm, tensile strength 1640MPa, temperature coefficient of resistance 43.6ppm / ℃.

Embodiment 3

[0029] Each component of the alloy is formulated according to the ingredients of 32% V, 3% Al, 1% Ru, and the balance of Pd; it is melted with a high-purity alumina crucible and a high-frequency induction furnace, and the melting chamber is first evacuated to 0.1×10 -4 Pa, filled with high-purity argon (99.999%, volume fraction) to positive pressure, the alloy is fully degassed in the molten state and cast in a crystallization mold, and the ingot is subjected to a homogenization heat treatment at 1300 ° C for 5 hours under argon protection; after 1200 ℃ Forging, rolling, thick wire drawing, and intermediate annealing are carried out with 1000 ℃ argon protection and heat preservation for 70 minutes, quick cooling, multi-mode fine drawing, and a wire material with a diameter of Φ0.04mm is prepared; 700 ℃ argon protection and heat preservation for 60 Short-range orderly transformation heat treatment with furnace slow cooling in minutes.

[0030] Properties of PdV32Al3Ru1 alloy: r...

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Abstract

The invention discloses a palladium vanadium precision high-resistance alloy and a preparation method thereof. The alloy comprises the chemical components, by mass percentage, of 28-32 of V, 1-4 of M(M is at least one of Cr and Al), 0-2 of Ru and the balance Pd. High-frequency induction melting is carried out to prepare ingots, and homogenization heat treatment, high-temperature forging, rolling,thick wire drawing, intermediate annealing, fine wire drawing and short-range order transformation heat treatment are performed to prepare wires with the diameter larger than phi0.03 mm. The alloy has high resistivity and tensile strength and low temperature coefficient of resistance, is a precision high-resistance alloy material with excellent comprehensive performance, and has broad applicationprospects in the field of high-resistance or small precision wire-wound potentiometers and resistors.

Description

technical field [0001] The invention relates to a palladium-vanadium precision high-resistance alloy and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] Precious metal high-resistance alloys are one of the development directions of precious metal precision resistance alloys today, and are mainly used in high-resistance or small precision wirewound potentiometers and resistors. [0003] A series of palladium-based, gold-palladium-based and gold-based high-resistance alloys have appeared abroad: PdW, PdMo, PdV, PdVAl (Mo, Au), AuPdMo, AuPdFe, AuPdFeAl (Ga, In), AuPdV (Ti, Fe, Co, Re), AuVFeNi, etc. These noble metal high-resistance alloys are almost all patented alloys, concentrated in the United States, Britain, and Germany. Some of these alloys began to be developed in China in the 1970s, and Kunming Institute of Precious Metals successfully developed high-resistance alloys such as AuPdFeAl and PdW. [0004] Among the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/04C22C1/02C22F1/14
CPCC22C1/02C22C5/04C22F1/14
Inventor 尹俊美刘毅张国全马丽华武海军戴华申丽琴卢绍平
Owner SINO PLATINUM METALS CO LTD
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