等径角挤压对铸造GH696合金力学性能的影响
Effect of ECAP on Mechanical Properties of GH696 Casted Alloy
摘 要
为了提高铸造GH696高温合金的力学性能,对该合金在1 000℃进行了等径角挤压变形,对经挤压变形及热处理后的组织与性能进行了研究.结果表明:该合金铸态组织经等径角挤压后得到了显著的细化:铸态合金经挤压变形后进行热处理时会发生再结晶:随挤压道次的增加,铸态组织的特征逐渐减少,强度和塑性得到提高:铸态合金经挤压变形和热处理后,即使还保留少量的铸态组织特征,但其强度和塑性均可达到锻态的水平.
力学性能
铸造
GH696合金
equal channel angular pressing(ECAP)
mechanical property
cast
GH696 alloy
Abstract
In order to improve the mechanical properties of casted GH696 alloy,the microstructure and mechanical properties of the alloy after deformation by equal channel angular pressing (ECAP) at 1 000℃ and heat treatment were studied.The results show that the as-casted microstructure had been fined significantly by ECAP.Recrystallization of the alloy would occur after ECAP and followed heat treatment,and the increase of ECAP passes decreased the characteristic of as-casted microstructure gradually and improved the strength and plasticity.The strength and plasticity of the as-casted alloy made by ECAP reached that of as-forged alloy with the same heat treatment ,even if a few of characteristic of as-casted microstructure was remained.
中图分类号 TG146.1
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50701047)
收稿日期 2009/2/26
修改稿日期 2009/8/25
网络出版日期
作者单位点击查看
备注杨钢(1963-),男,江西南昌人,教授级高工,博士.
引用该论文: YANG Gang,WANG Li-min,LIU Zheng-dong. Effect of ECAP on Mechanical Properties of GH696 Casted Alloy[J]. Materials for mechancial engineering, 2010, 34(3): 9～12
杨钢,王立民,刘正东. 等径角挤压对铸造GH696合金力学性能的影响[J]. 机械工程材料, 2010, 34(3): 9～12
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参考文献
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