GH907合金自由锻环形件混晶组织的分析及改进  

Analysis and Improvement of Mixed Crystal Microstructure of GH907 Alloy Free Forging Ring Parts

作　　者：唐晓辉 杨树林 藏德昌 刘晶[2] 

机构地区：[1]PLA驻沈阳黎明发动机制造公司军事代表室,辽宁沈阳110043 [2]沈阳黎明航空发动机(集团)有限责任公司,辽宁沈阳110043

出　　处：《热加工工艺》2015年第7期141-144,共4页Hot Working Technology

摘　　要：针对GH907合金自由锻环形件组织不均匀的问题,分析了原材料和锻造过程对锻件组织的影响,提出了改进措施。加热温度偏高、终锻变形量偏小、终锻温度偏低是导致锻件不均匀组织的主要原因,原材料的混晶组织会加剧锻件的组织不均。采用软包套保证终锻温度,将坯料的高径比提高到1.8,将棒材直径减小到155 mm,将环坯加热温度降到1050℃,终锻变形量提高到35%,此时锻件的组织均匀性明显改善,力学性能有一定提高。Aiming at the problem of uneven microstructure of the GH907 alloy free forging ring parts, effects of raw material and forging process on forging microstructure were analyzed. And improvement measures were presented. The too high heating temperature, the too small final forging deformation and the too low final forging temperature are main causes of uneven forging microstructure, and mixed grain microstructure of raw materials will aggravate the unevenness of forging microstructure. Ensuring the final forging temperature by the soft sleeve, increasing the blank height to diameter ratio to 1.8, reducing the bar diameter to 155mm, reducing the ring billet heating temperature to 1050~C, and increasing the final forging deformation to 35% ,forging microstructure uniformity can improved obviously, and its mechanical properties are some elevated.

关 键 词：自由锻 环形件 混晶组织 低膨胀高温合金 GH907合金 

分 类 号：TG316[金属学及工艺—金属压力加工]