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Preparation method of cold deformation strengthened Cu-Cr-Zr-Mg alloy

A cu-cr-zr-mg, cold deformation technology, applied in the field of copper alloy preparation, can solve problems such as the decrease of electrical conductivity, and achieve the effect of improving performance and promoting alloy strength and electrical conductivity

Inactive Publication Date: 2019-10-25
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of cold deformation strengthened Cu-Cr-Zr-Mg alloy, which solves the problem that the increase of Cu-Cr-Zr-Mg alloy hardness is often accompanied by the decrease of electrical conductivity in the prior art. question

Method used

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  • Preparation method of cold deformation strengthened Cu-Cr-Zr-Mg alloy
  • Preparation method of cold deformation strengthened Cu-Cr-Zr-Mg alloy
  • Preparation method of cold deformation strengthened Cu-Cr-Zr-Mg alloy

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Experimental program
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Effect test

Embodiment 1

[0036] Put the weighed Cu blocks and Zr particles into the vacuum arc melting furnace, and vacuumize to 2×10 -3 As above, the argon gas protection is introduced, the current should be controlled at 200 amperes during the smelting process, and the smelting is repeated 4 times to obtain a Cu-20wt% Zr master alloy. To prepare an alloy whose target composition is Cu-0.3Cr-0.1Zr-0.08Mg, put the calculated and weighed Cu block, Cr grain, Mg block and Cu-Zr master alloy into the graphite crucible in order from bottom to top , evacuated to 5×10 -3 Above Pa, filled with argon as protective gas. Firstly, the alloy was heated up rapidly to 1000°C, kept for 2 minutes, then raised to 1300°C, kept for 10 minutes, then cooled to 1100°C, kept for 5 minutes. The alloy liquid was poured into the lower copper mold with an outer diameter of 80mm and an inner diameter of 20mm to obtain a cast Cu-Cr-Zr-Mg alloy. Put the obtained as-cast alloy into a heat treatment furnace for solution treatment,...

Embodiment 2

[0038] Put the weighed Cu blocks and Zr particles into the vacuum arc melting furnace, and vacuumize to 2×10 -3 Above Pa, argon protection is introduced, the current should be controlled at 280 amperes during the smelting process, and the smelting is repeated 3 times to obtain a Cu-25wt% Zr master alloy. To prepare an alloy whose target composition is Cu-0.5Cr-0.2Zr-0.15Mg, put the calculated and weighed Cu block, Cr grain, Mg block and Cu-Zr master alloy into the graphite crucible in order from bottom to top , evacuated to 5×10 -3Above Pa, filled with argon as protective gas. Firstly, the alloy was heated up rapidly to 1050°C, kept for 3 minutes, then slowly raised to 1350°C, kept for 15 minutes, then cooled to 1150°C, kept for 6 minutes. The alloy liquid was poured into the lower copper mold with an outer diameter of 120mm and an inner diameter of 30mm to obtain a cast Cu-Cr-Zr-Mg alloy. Put the obtained cast alloy into a heat treatment furnace for solution treatment, the...

Embodiment 3

[0040] Put the weighed Cu blocks and Zr particles into the vacuum arc melting furnace, and vacuumize to 2×10 -3 Above Pa, argon protection is introduced, the current should be controlled at 300 amperes during the smelting process, and the smelting is repeated 5 times to obtain a Cu-40wt% Zr master alloy. To prepare an alloy whose target composition is Cu-0.8Cr-0.3Zr-0.25Mg, put the calculated and weighed Cu block, Cr particle, Mg block and Cu-Zr master alloy into the graphite crucible in order from bottom to top , evacuated to 5×10 -3 Above Pa, filled with argon as protective gas. Firstly, the alloy was heated up rapidly to 1100°C and held for 4 minutes, then slowly raised to 1400°C, held for 18 minutes, then cooled to 1180°C, held for 6 minutes. The alloy liquid was poured into the lower copper mold with an outer diameter of 130mm and an inner diameter of 40mm to obtain a cast Cu-Cr-Zr-Mg alloy. Put the obtained cast alloy into a heat treatment furnace for solution treatme...

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Abstract

The invention discloses a preparation method of a cold deformation strengthened Cu-Cr-Zr-Mg alloy. The preparation method specifically comprises the following steps: putting a Cu block, Cr particles,an Mg block and a Cu-Zr intermediate alloy into a smelting container for induction smelting to obtain a Cu-Cr-Zr-Mg molten alloy; pouring the molten alloy in a copper mold to be cooled to obtain an as-cast Cu-Cr-Zr-Mg alloy; and carrying out solid solution treatment, cold rolling transformation and ageing treatment subsequently on the as-cast alloy, and machining the as-cast alloy to obtain a Cu-Cr-Zr-Mg alloy finished product. By cooling the Cu-Cr-Zr-Mg molten alloy quickly by the copper mold and introducing cold rolling deformation in conventional solid solution ageing treatment to enhance the separate-out power of a supersaturated solid solution in the ageing stage, dispersed fine second phase particles are separated out from a copper matrix massively, and the strength and the electricconductivity of the alloy are enhanced obviously.

Description

technical field [0001] The invention belongs to the technical field of copper alloy preparation and relates to a preparation method of cold deformation strengthened Cu-Cr-Zr-Mg alloy. Background technique [0002] Cu-Cr-Zr alloys have high strength, electrical conductivity, good thermal conductivity and oxidation resistance, and are considered to be the most promising type of alloy among high-strength and high-conductivity copper alloys. This type of alloy belongs to precipitation strengthening alloys. It has both excellent electrical and thermal conductivity and tensile strength, and has a high softening temperature and good wear resistance. Adding the fourth component Mg to the Cu-Cr-Zr alloy can refine the precipitated phase of Cr to a certain extent, and improve the hardness of the alloy after aging. However, the increase in the hardness of the Cu-Cr-Zr-Mg alloy is often accompanied by with a decrease in conductivity. Studies have shown that the alloy forms a microstru...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/03C22F1/08
CPCC22C1/03C22C9/00C22F1/002C22F1/08
Inventor 杨晓红王澄德邹军涛肖鹏梁淑华
Owner XIAN UNIV OF TECH