变形工艺对FGH96合金晶粒异常长大的影响  

Effect of Forging Process on Abnormal Grain Growth of FGH96 Superalloy

作　　者：杨杰[1] 王晓峰[1] 吉传波[1] 邹金文[1] 

机构地区：[1]北京航空材料研究院,先进高温结构材料重点实验室,北京100095

出　　处：《航空材料学报》2014年第5期7-11,共5页Journal of Aeronautical Materials

摘　　要：基于FGH96合金双锥体试样及圆柱试样等温压缩变形实验,研究了变形温度、应变速率及应变对晶粒异常长大的影响规律,并对双锥体试样的等温压缩进行了数值模拟计算。结果表明：通过双锥体试样等温压缩,总结出FGH96合金在变形温度960～1060℃,应变速率0.0032～0.032s-1范围内,异常晶粒长大的敏感工艺参数组合。当变形温度1040℃,压头速率0.1mm/s时,在应变0.03～0.2范围内,FGH96合金晶粒组织均匀,无异常晶粒组织出现。建立了FGH96合金的有限元模型,模拟了双锥体试样的等温压缩,得到了与试样截面晶粒分布特征相对应的应变分布。Based on the compression experiments of FGH96 Double Cone （DC） specimens and circular cylinder specimens, the effect of forging temperature, strain rate and strain on Abnormal Grain Growth （AGG） was examined, and isothermal compression of DC specimens was simulated with finite element method （FEM）. The critical process parameters are determined within temperature 960℃ - 1060℃ and strain rates 0. 0032s-1 - 0. 032s -1 based on the compression of DC specimens. It is found that AGG does not occur within the strain range 0.03 -0. 2 at 1040℃ with the crosshead speed of 0. 1 mm/s. A FEM model is developed for FGH96 superalloy and DC specimen compression is simulated. The strain distribution in the cross section of compression DC specimen is obtained by simulating, which corresponds to the grains distribution from experiment.

关 键 词：FGH96合金 异常晶粒长大 锻造 

分 类 号：TF124[冶金工程—粉末冶金] V215.5[冶金工程—冶金物理化学]