冷轧变形对Inconel 718合金δ相γ″相析出行为的影响  

EFFECT OF COLD ROLLING ON THE PRECIPITATION BEHAVIOR OF δ PHASE AND γ″ PHASE IN INCONEL 718

作　　者：刘文昌[1,2] 陈宗霖[1,2] 肖福仁[1,2] 姚枚 姜照群[1,2] 王少刚 

机构地区：[1]燕山大学材料工程学院 [2]沈阳黎明发动机制造公司

出　　处：《航空学报》1999年第3期279-282,共4页Acta Aeronautica et Astronautica Sinica

基　　金：中国航空工业总公司重点攻关项目

摘　　要：采用Ｘ射线衍射技术测定了冷轧Ｉｎｃｏｎｅｌ７１８合金在８６０℃加热温度下的δ相和γ″相含量，研究了冷轧变形对δ相和γ″相析出行为的影响。结果表明，冷轧变形影响δ相的析出形貌，随冷轧变形量增加，δ相由针状向颗粒状转变。δ相析出的重量百分数与时间的关系符合Ａｖｒａｍｉ方程，随冷轧变形量增加，ｎ值减小，α值增加。在８６０℃加热温度下，等温１５ｍｉｎ时已有γ″相析出，随时间增加，γ″相含量增加，达到最大值后又降低。在试验中给定的时间条件下，随冷轧变形量增加，γ″相含量降低，而δ相含量增加。The weight percentages of δ phase and γ″ phase in Inconel 718 cold rolled to different reductions and then treated at 860℃ for different times were measured by the X ray diffraction method, and the effect of cold rolling on the precipitation behavior of δ phase and γ″ phase was investigated. The results show that cold rolling affects the morphology of δ phase. As cold rolling amount increases, the shape of δ phase changes gradually from needle to spheroid. The relationship between the weight percentage of δ phase and annealing time follows the Avrami equation. As cold rolling amount increases, the value of n decreases, whereas the value of α increases. In the case of 860℃ for 15 minutes, the γ″ phase has been precipitated in austenite matrix. With the increasing time, the weight percentage of γ″ phase increases to a maximum value, and then decreases. For a given time in this experiment, as cold rolling amount increases, the weight percentage of γ″ phase decreases, whereas the weight percentage of δ phase increases.

关 键 词：冷轧 析出相 Inconel合金 合金 

分 类 号：TG131[一般工业技术—材料科学与工程]