不同重熔工艺对Nimonic 90合金显微组织和力学性能的影响  

Investigation of Different Remelting Processes on Microstructure and Mechanical Properties of Nimonic 90 Superalioy

作　　者：张志伟[1] 牛永吉[1] 田建军[1] 安宁[1] 高杨[1] 王超[1] 史世凤[1] 

机构地区：[1]北京北冶功能材料有限公司,北京100192

出　　处：《金属材料研究》2015年第4期9-12,共4页Research on Metallic Materials

摘　　要：摘要重点研究了不同重熔工艺对Nimonic90合金铸态显微组织和力学性能的影响。研究发现，该合金的微观组织主要由γ、γ’以及碳化物构成，且合金的晶粒度呈现增加的趋势。力学性能测试结果表明，合金的强度随壳型温度的提高而降低约15％，而延伸率没有明显变化。Effect of different remelting processes on as-cast microstructure and mechanical properties of Nimonic 90 superalloy was investigated by OM （optical micrography）, SEM （scanning electron microscopy） and tensile tests. The results indicated that as-cast micro- structure of the alloy was mainly composed of γ, γ＇ and carbides, and the average grain size of the alloy tended to increase. The strength of the alloy decreased with the increasing of mold shell temperature, while the elongation was not significantly changed.

关 键 词：Nimonic 90 重熔工艺 力学性能 

分 类 号：TG115.5[金属学及工艺—物理冶金]