等离子熔积直接成形GH163高温合金零件组织研究  

Research on Microstructure of GH163 Super Alloy Part Directly Manufactured by PDM

作　　者：熊新红[1] 张海鸥[2] 罗继相[1] 王桂兰[2] 徐继彭[2] 

机构地区：[1]武汉理工大学港口装卸技术交通行业重点实验室,武汉430063 [2]华中科技大学材料成形与模具技术国家重点实验室,武汉430074

出　　处：《中国机械工程》2009年第6期733-737,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50474053,50475134)

摘　　要：采用多种分析工具对等离子熔积直接成形GH163高温合金零件的微观组织和相组成进行了深入研究。根据金属凝固过程的晶体生长理论,分析多层熔积试样的组织特征,成分偏析及析出相的特征。比较分析了分别采用真空精密熔模铸造法和等离子熔积制造法成形的高温合金零件的组织与成分。结果表明:等离子熔积直接成形高温合金工艺具有快速凝固特性,与真空铸造件相比,其微观组织均匀、偏析小,晶粒细小且致密,熔积层无分层、气孔、夹杂等缺陷。A variety of analytical tools was used to analyze the microstructure and the phases of GH163 super-alloy parts directly made by plasma deposition manufacturing（PDM） herein. According to the crystal growth theory of metal solidification process,the GH163 super-alloy components fabricated and the segregation process were characterized in terms of PDM process and vacuum precision investment casting process. GH163 super-alloy parts formed by PDM possess a rapid solidification process and are of perfectly fine and dense microstructure with unique composition uniformity and minimal segregation compared with the casting process.

关 键 词：等离子熔积成形 高温合金 金属零件 微观组织 

分 类 号：TG47[金属学及工艺—焊接]