摘要
采用光学显微镜、硬度和压缩试验,研究了冷却速率对Mg97Gd2Zn1合金铸态组织和力学性能的影响。结果表明,在18～112℃/s的冷却速率范围内,Mg97Gd2Zn1合金的初生相呈树枝晶状,随着冷却速率的提高,二次枝晶间距逐渐减小;合金的第二相随着冷却速率的提高得到明显的细化;Mg97Gd2Zn1合金的强度和硬度随着冷却速率的提高而增加。
The efferts of cooling rate on solidified microstructure of Mg97Gd2Zn1 alloy and mechanical properties were investigated by optical microscopy, hardness and compression tests. The result indicates that the cooling rate has significant effects on solidified microstructure and mechanical properties of the alloy. In the range of cooling rate 1 8-1 1 2 ℃/s, the second dendrite arm spacing of the alloys decreases with the increase of cooling rate. Dendrite morphology of the second phases changes from the coarse to the thin. The second phases of the alloy refine significantly with the increase of cooling rate, and the strength and hardness of the alloy improve.
出处
《铸造技术》
CAS
北大核心
2013年第3期317-319,共3页
Foundry Technology
基金
国家自然科学基金资助项目(51101084)
江西省科技支撑计划项目(2009BHB15500)
