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Composite rare earth additive capable of improving thermal-fatigue-resistant performance of copper-aluminum based alloy

A technology for compounding rare earth and additives, applied in the field of copper alloys, can solve the problems of limited application scope and insufficient uniform performance, and achieve the effects of improving thermal fatigue performance, improving performance and refining grains

Inactive Publication Date: 2015-11-25
ZHENJIANG YINUOWEI SHAPE MEMORY ALLOYS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it also has shortcomings such as uneven performance, which limits its application range.

Method used

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  • Composite rare earth additive capable of improving thermal-fatigue-resistant performance of copper-aluminum based alloy
  • Composite rare earth additive capable of improving thermal-fatigue-resistant performance of copper-aluminum based alloy
  • Composite rare earth additive capable of improving thermal-fatigue-resistant performance of copper-aluminum based alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] The thermal fatigue test was carried out using a resistance furnace heating self-constraining thermal fatigue testing machine. The plate-shaped sample is clamped on the four sides of the cube fixture to ensure that the heating and cooling positions of each sample are consistent, and the transmission device moves vertically up and down, so as to achieve automatic completion of sample heating and cooling. The temperature is measured and controlled by the thermocouple, the sample is heated and cooled between the room temperature of 20°C and 450°C, and the counter is used for automatic counting, and the furnace temperature is adjusted and maintained at 450°C, and the water temperature is 20°C (flowing tap water). Rapidly heat the sample, heating and cooling once as a cycle, the heating time of each cycle is 120s, and the cooling time in water is 5s, until the predetermined number of cycles. For the sample for studying thermal fatigue crack initiation, every cycle is 500 ti...

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Abstract

The invention discloses a composite rare earth additive capable of improving the thermal-fatigue-resistant performance of a copper-aluminum based alloy, and belongs to the technical field of copper alloy. The additive is characterized by being composed of the following components in percentage by weight: 10 to 15% of Nd, 8 to 12% of Tb, 7 to 10% of V, 7 to 10% of Sb, 6 to 9% of Ce, 15 to 20% of La, Sc, Sm, Er, Yb, Lu, Gd, Nb, Ti, and Ba, and the balance being copper. The alterant is a block-shaped taupe alloy, the melting point is in a range of 800 to 1200 DEG C, and the addition amount of composite rare earth additive is in a range of 0.2 to 1.2%.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, in particular to a composite rare earth additive for improving thermal fatigue performance of copper-aluminum base alloys. Background technique [0002] In the metallurgical industry, rare earths are often referred to as the "vitamins" of metal materials. Its characteristic is that a small or even trace amount of rare earth acts on the alloy, which can significantly improve its comprehensive performance. Rare earth elements in copper alloys are mainly used to improve hot workability and casting structure, prevent segregation; obtain high strength, good thermal fatigue performance and corrosion resistance. Adding rare earth elements to the copper alloy also has a certain deoxidation effect, so that an oxide film can be formed on the surface of the copper alloy, which prevents the diffusion of atoms in the external medium of the alloy to the inside, and effectively improves the corrosion res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/03C22C9/00
Inventor 张志敏管志锋李萌万浩白高鹏
Owner ZHENJIANG YINUOWEI SHAPE MEMORY ALLOYS
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