摘要
采用拔长为预变形方式的SIMA法制备ZCuSn10铜合金半固态坯料,研究在半固态温度区间重熔加热过程中半固态ZCuSn10铜合金坯料初生相形貌的演变过程。结果表明:在液固两相区间对半固态组织保温,半固态ZCuSn10铜合金坯料初生相逐渐球化。在900℃保温3 min后开始出现液相,且液相率、平均晶粒直径均随着保温时间的增加而增加,液相分数由5 min的23.5%增加至20 min的32.7%,平均晶粒直径由8 min的41.7μm增大至20 min的58μm,形状因子随着保温时间延长先减小后增加,在保温15 min形状因子最小为1.75。
Semi-solid ZCuSn10 copper alloy billet was fabricated by strain induced melt activation method( SIMA) fot which forging was adopted as the method of the pre-deformation. The evolution of primary phase morphology of the ZCuSn10 copper alloy billet in remelting process at solid-liquid temperature was studied. The results indicate that isothermal in the two phase range of solid and liquid can lead semi-solid primary phase of ZCuSn10 copper alloy billet to be spheroidized gradually. Liquid phase begins to appear after holding at900 ℃ for 3 min. The liquid volume and average grain diameter of the alloy increase with the increasing of holding time. The liquid fraction increases from 23. 5% to 32. 7% with the holding time increasing from 5 min to 20 min. The average grain diameter increased froms 41. 7 μm to 58 μm when the holding time increases from 8 min to 20 min. The shape factor decreases and then increases with the holding time increasing,the minimum value of the shape factor is 1. 75 at holing time of 15 min.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第9期106-110,115,共6页
Transactions of Materials and Heat Treatment
基金
云南省应用基础研究重点项目(2011FA007)
高等学校博士学科点专项科研基金(20125314120013)
云南省教育厅科学研究基金项目(2012Y543)
四川理工学院培育项目(2013PY05)
