GH141合金的显微组织控制  

Microstructures Control in Ni-base Superalloy GH141

作　　者：于慧臣[1] 谢世殊[2] 吕俊英[2] 赵光普[3] 杨洪才[2] 

机构地区：[1]北京航空材料研究院,北京100095 [2]东北大学材料与冶金学院,沈阳110006 [3]北京钢铁研究总院,北京100081

出　　处：《材料工程》2003年第5期7-10,共4页Journal of Materials Engineering

摘　　要：研究了热处理对GH141合金显微组织的影响规律。结果表明,1080～1120℃固溶处理过程中合金晶粒的长大与主要强化相γ′及碳化物的溶解密切相关。固溶空冷试样在760～900℃时效过程中,主要强化相γ′按"台阶机制"由最初的球形颗粒逐渐粗化成为规则排列的立方体形貌,符合点阵扩散控制的"Ostwald"熟化规律,粗化激活能为276.8kJ/mol。The effects of heat treatment on microstructures in Nibase superalloy GH141 were investigated The results show that a normal grain growth is closely related with dissolution of γ′ phases and carbides during solution treating at 1080~1120℃ γ′ phases coarsened by the step growth mechanism change from round shape to cubic one during ageing at 760~900℃, following the latticediffusioncontrolled growth rule (Ostwald ripening) The coarsening active energy is 2768kJ/mol

关 键 词：高温合金 热处理 显微组织 γ’相 晶界碳化物 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TG113.12[金属学及工艺—金属材料]