Copper-chromium-zirconium alloy and preparation method thereof

A copper-chromium-zirconium and alloy technology, applied in metal/alloy conductors, cable/conductor manufacturing, conductive materials, etc., can solve the problems of short service life, high current and high resistance, and achieve long service life, high yield and high efficiency. high effect

Active Publication Date: 2021-11-30
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conductivity of C18150 is generally 80% IACS, and the hardness HRB is about 80. It is widely used in the field of traditional steel plate welding. However, when welding aluminum plates, due to the large current and high self-resistance, it is easy to heat and soften, resulting in a short service life.
Compared with C18150, C15000 has a conductivity of 90% IACS, but its hardness HRB is only about 65. Although its own resistance is small, the lower hardness is prone to wear and tear during welding, and its service life is also shorter.
[0005] In the foreseeable future, the demand for high service life copper materials in the aluminum plate resistance spot welding industry will continue to increase, but the materials currently on the market cannot meet the needs of downstream customers

Method used

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  • Copper-chromium-zirconium alloy and preparation method thereof
  • Copper-chromium-zirconium alloy and preparation method thereof
  • Copper-chromium-zirconium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation steps of this copper-chromium-zirconium alloy are as follows:

[0029] Step 1: A copper alloy wire billet is produced by a continuous casting method, and the diameter of the wire billet is 35mm.

[0030] Step 2: the first cold deformation: drawing the copper alloy wire blank obtained in step 1 with a deformation amount of 36%;

[0031] Step 3: Perform recrystallization annealing on the wire blank after cold working in step 2, the temperature is controlled at 800°C, and the holding time is 5h;

[0032] Step 4: Repeat step 2;

[0033] Step 5: Repeat step 3;

[0034] Step 6: The second cold deformation: drawing the wire billet after recrystallization annealing in step 5 with a deformation amount of 30%;

[0035] Step 7: Perform solution treatment on the wire billet after cold working in step 6, the solution temperature is controlled at 940°C, and the holding time is 1.5h;

[0036] Step 8: The third cold deformation: cold working the wire blank after sol...

Embodiment 2

[0040] The preparation steps of this copper-chromium-zirconium alloy are as follows:

[0041] Step 1: A copper alloy wire billet is produced by a continuous casting method, and the diameter of the wire billet is 30mm.

[0042] Step 2: the first cold deformation: drawing the copper alloy wire blank obtained in step 1 with a deformation amount of 30%;

[0043] Step 3: Perform recrystallization annealing on the wire blank after cold working in step 2, the temperature is controlled at 900°C, and the holding time is 1h;

[0044] Step 4: Repeat step 2;

[0045] Step 5: Repeat step 3;

[0046] Step 6: The second cold deformation: the wire billet after the recrystallization annealing in step 5 is subjected to drawing processing with a deformation amount of 36%;

[0047] Step 7: Perform solution treatment on the wire billet after cold working in step 6, the solution temperature is controlled at 980°C, and the holding time is 0.5h;

[0048] Step 8: The third cold deformation: cold wor...

Embodiment 3

[0052] The preparation steps of this copper-chromium-zirconium alloy are as follows:

[0053] Step 1: A copper alloy wire billet is produced by a continuous casting method, and the diameter of the wire billet is 25mm.

[0054] Step 2: the first cold deformation: drawing the copper alloy wire blank obtained in step 1 with a deformation amount of 30%;

[0055] Step 3: Perform recrystallization annealing on the wire blank after cold working in step 2, the temperature is controlled at 840°C, and the holding time is 4h;

[0056] Step 4: The second cold deformation: the wire billet after the recrystallization annealing in step 3 is subjected to drawing processing with a deformation amount of 32%;

[0057] Step 5: Perform solution treatment on the wire billet after cold working in step 4, control the solution temperature at 960° C., and hold for 1 hour;

[0058] Step 6: The third cold deformation: cold working the wire blank after solid solution in step 5 with a deformation amount ...

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Abstract

The invention discloses a copper-chromium-zirconium alloy. The copper-chromium-zirconium alloy is characterized by comprising the following components in percentages by mass: 0.3-0.5wt% of Cr, 0.03-0.05wt% of Zr, 0.04-0.08wt% of Ni, 0.01-0.02wt% of Si, 0.01-0.02wt% of Fe, and the balance of Cu and inevitable impurities. According to the copper-chromium-zirconium alloy, Cr, Zr, Ni, Si and Fe are added into the copper alloy, and the respective addition amounts are controlled; Cr and Zr improve the strength of a matrix and meanwhile improve the high-temperature softening resistance of the material; Ni and Si improve the strength of the matrix and meanwhile do not obviously influence the electric conductivity of the matrix; a trace amount of Fe element refines the crystal grains of the matrix and improves the strength of the material; and all the elements cooperate with one another to realize that the electric conductivity of the copper-chromium-zirconium alloy is 90-95% IACS, and the hardness is HRB 75-78. The strength and the electric conductivity meet passing of large current, and the copper-chromium-zirconium alloy is resistant to abrasion, long in service life and suitable for the aluminum plate resistance spot welding industry.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, and in particular relates to a copper-chromium-zirconium alloy and a preparation method thereof. Background technique [0002] Compared with traditional steel, aluminum alloy has the advantages of low density, high specific strength, corrosion resistance, good formability and easy recycling, and has become the most used material among many lightweight alternative materials. [0003] The assembly of different parts involved in automobile production, the most common is resistance spot welding. Resistance spot welding is a method in which different workpieces are lapped and combined, pressure is applied through electrodes, and the resistance heat generated by current passing through the contact surface and adjacent areas is used for welding. Due to the high electrical conductivity and thermal conductivity of aluminum alloy, the required welding current and electrode pressure are generally 3 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00B22D11/00C21D8/06C22F1/08H01B1/02H01B13/00B21C1/02
CPCC22C9/00B22D11/004B22D11/005C22F1/08C21D8/06H01B1/026H01B13/00B21C1/02
Inventor 刘喆张宝赵向辉瞿福水刘关强王文龙
Owner JINTIAN COPPER GROUP CORP NINGBO
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