一种微合金化马氏体不锈钢的连续冷却转变研究  

Study on continuous cooling transformation of a micro-alloyed martensitic stainless steel

作　　者：孙淑华[1] 傅万堂[2] 王振华[2] 李慧[2] 张亚才 曲明贵[2] 

机构地区：[1]燕山大学理学院,河北秦皇岛066004 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 [3]中国第一重型机械集团股份公司,黑龙江齐齐哈尔161042

出　　处：《燕山大学学报》2011年第2期102-104,共3页Journal of Yanshan University

基　　金：国家"高档数控机床与基础制造装备"科技重大专项资助项目(2009ZX04014-061-09)

摘　　要：用膨胀法结合金相与硬度分析研究了一种新型水轮机叶片用V、N微合金化CrNiMo不锈钢的连续冷却转变行为,获得了该钢的连续冷却转变（CCT）曲线及不同冷却条件下的显微组织和硬度。结果表明,试验用钢的1、3、和温度分别为580℃、730℃、295℃和190℃,其贝氏体和铁素体分别在冷速小于0.5和0.2℃/s时出现,冷速在0.056~0.5℃/s之间时,硬度随着冷速的增大迅速增加,尔后随着冷速的增大,硬度缓慢升高。The continuous cooling transformation behavior of a CrNiMo martensitic stainless steel microalloyed with V and N was studied by the use of the expansion methods etc under different cooling rates.The transformation processes of austenite in the steel under different cooling rates as well as the microstructures and hardness were analyzed.The results show that the temperatures of Ac1,Ac 3, Ms and are 580 ℃,730 ℃,295 ℃ and 190 ℃ respectively,and bainite can be obtained when the cooling rate is below 0.5 ℃/s, ferrite can be obtainedwhen the cooling rate is below0.2℃/s.While the cooling rate is at the range of 0.056~0.5 ℃/s,with the increase of cooling rate,the hardness increases sharply.Thereafter,the hardness rises slowly with increasing cooling rate.

关 键 词：微合金化 马氏体不锈钢 CCT曲线 硬度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]