T91耐热钢退火优化工艺  

Process Optimization of T91 Heat-resistant Steel

作　　者：范金城 王一谦[2] 李佑河 黄贞益[2] 陈富强[2] 

机构地区：[1]南京钢铁公司中型厂,江苏南京210035 [2]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《热加工工艺》2012年第22期177-179,共3页Hot Working Technology

基　　金：国家科技支撑计划项目(2007DAE30B01);轧制技术及连轧自动化国家重点实验室开放课题(2009002)

摘　　要：通过退火工艺实验,优化了T91钢的热处理工艺。结果表明,试样正火后得到板条马氏体组织,经过不同工艺热处理后,试样高温回火后组织为回火马氏体,碳化物强化作用减小,硬度降低。退火工艺为780℃保温1h后空冷,试样的硬度为23.7HRC,满足实际生产需要;改进后的退火工艺较原始退火工艺时间缩短,提高了退火炉的利用率。The heat treatment process of T91 steel was optimized through annealing process test. The results show that the tempered martensite is obtained after normalization process. With different heattreatment process, the microstructure of the sample is tempered martensite, the reinforcement of carbide decreases, the hardness reduces. The process is heating at 780 ℃ and holding for 1 h, the hardness of the sample is 23.7 HRC, which can meet the practical production needs. The annealing time shortens, the utilization rate of annealing furnace improves.

关 键 词：T91钢 退火 硬度 工艺优化 

分 类 号：TG151.3[金属学及工艺—热处理]