冷却速度对Cu-Cr合金组织和性能的影响

谭敦强; 江惠民; 肖冬飞; 余方新; 陈伟; 张全孝

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冷却速度对Cu-Cr合金组织和性能的影响
Effects of Cooling Rate on the Microstructure and Properties of Cu-Cr Alloy
2007年第8期页码：645-646
纸质出版日期： 2007 ，
DOI：

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[1]谭敦强,江惠民,肖冬飞,余方新,陈伟,张全孝.冷却速度对Cu-Cr合金组织和性能的影响[J].特种铸造及有色合金,2007(08):645-646+574.

Tan Dunqiang1, Jiang Huimin1, Xiao Dongfei1, et al. Effects of Cooling Rate on the Microstructure and Properties of Cu-Cr Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(8):645-646.
[1]谭敦强,江惠民,肖冬飞,余方新,陈伟,张全孝.冷却速度对Cu-Cr合金组织和性能的影响[J].特种铸造及有色合金,2007(08):645-646+574. DOI：

Tan Dunqiang1, Jiang Huimin1, Xiao Dongfei1, et al. Effects of Cooling Rate on the Microstructure and Properties of Cu-Cr Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(8):645-646. DOI：

摘要

通过对气体雾化法制备的不同粒径的Cu-12.5Cr粉末的冷却速度进行了理论计算

分别采用金相、显微硬度计、X射线衍射研究了不同冷却速度对样品中Cr存在的形貌、分布以及对硬度、点阵常数等性能的影响。结果表明

当冷却速度由104K/s增大到105K/s时

Cu-12.5Cr粉末的硬度增大约1倍。当冷却速度由104K/s增大到106K/s

Cu的晶粒不断变小

但Cr的晶粒先变小后增大。

Abstract

The cooling rate of Cu-12.5Cr powder with various diameters prepared by gas atomization process was calculated by the convection heat-transfer theory. The effects of cooling rate on morphology and distribution of Cr phase in the alloy

and on hardness and lattice constant have been investigated by OM（optical microscope）

micro-hardness meter and XRD （X-ray diffraction）. The results reveal that the hardness of the Cu-12.5Cr powder is increased by about 100%

and the grain size of Cu phase in the alloy is decreased while the grain size of Cr phase is firstly reduced then increased with the increase of cooling rate from 104 K/s to 105 K/s.