镍基耐蚀合金Hastelloy C-276锻造开裂原因分析  

Forging cracking cause analysis of Ni-based corrosion-resistant alloy Hastelloy C-276

作　　者：嵇爽 李会林 赵秀娟 张雲飞 赵英利 陈文 石玉龙 邢成亮 Ji Shuang;Li Huilin;Zhao Xiujuan;Zhang Yunfei;Zhao Yingli;Chen Wen;Shi Yulong;Xing Chengliang(Hesteel Group Technology Research Institute,Shijiazhuang Hebei 052165,China;Hebei University of Industy and Technology,Shijiazhuang Hebei 050091,China)

机构地区：[1]河钢集团钢研总院,河北石家庄052165 [2]河北工业职业技术大学,河北石家庄050091

出　　处：《金属热处理》2021年第6期240-244,共5页Heat Treatment of Metals

摘　　要：耐蚀合金Hastelloy C-276锻造过程中出现开裂,对其开裂原因进行了分析,并研究了均质化处理对其组织的影响以提高锻造成材率。结果表明,Hastelloy C-276合金铸态组织中存在大量μ析出相,是导致锻造开裂的主要原因。通过提高均质化加热温度和延长保温时间,可减轻枝晶偏析,经1170℃保温10 h空冷后,偏析几乎全部消失,锻造良好。Cracking cause of corrosion resistant alloy Hastelloy C-276 during forging process was analyzed,and the effect of homogenization treatment on its microstructure was studied to improve the forging yield.The results show that there are a lot of μ precipitates in the as-cast microstructure of Hastelloy C-276 alloy,which is the main cause for the forging cracking.By increasing the homogenization heating temperature and prolonging the holding time,the dendrite segregation can be reduced.After heating at 1170 ℃.for 10 h followed with air cooling,the segregation disappears and the forging effect is good.

关 键 词：Hastelloy C-276合金 析出相 均质化处理 枝晶偏析 

分 类 号：TG142.1[一般工业技术—材料科学与工程]