中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 21 No. 10 October 2011 |
Cu-Zn alloy after high pressure heat treatment
（1. State Key Laboratory of Metastable Materials Science and Technology,
Yanshan University, Qinhuangdao 066004, China;
2. Department of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China;
3. Department of Basic Medical, Tangshan Vocational Technology College, Tangshan 063000, China;
4. College of Physics and Chemistry, Hebei Normal University of Science and Technology,
Qinhuangdao 066004, China）
Abstract:The thermal expansion coefficients of Cu-Zn alloy before and after high pressure treatment were measured by thermal expansion instrument in the temperature range of 25−700 °C, and the microstructure and phase transformation of the alloy were examined by optical microscope, X-ray diffractometer (XRD) and differential scanning calorimeter (DSC). Based on the experimental results, the effects of high pressure treatment on the microstructure and thermal expansion of Cu-Zn alloy were investigated. The results show that the high pressure treatment can refine the grain and increase the thermal expansion coefficient of the Cu-Zn alloy, resulting in that the thermal expansion coefficient exhibits a high peak value on the α−T curve, and the peak value decreases with increasing the pressure.
Key words: Cu-Zn alloy; high pressure heat treatment; microstructure; thermal expansion coefficient
