3.5Ni低温压力容器钢氧化层结构特性分析  

Research on structure characteristics of oxide layer on 3.5Ni low temperature steel for pressure vessel

作　　者：陈华圣[1,2] 张彦文[2] 刘孟[2] 王宪军[2] CHEN Huasheng ZHANG Yanwen LIU Meng WANG Xianjun(State Key Lab Breeding Base of Refarctories＆ Ceramics of WUST, Wuhan 430081 ,China Research and Development Center of WISCO, Wuhan 430080, China)

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉4300801 [2]武钢研究院,湖北武汉430080

出　　处：《武钢技术》2017年第1期20-22,共3页Wisco Technology

摘　　要：以3.5Ni低温压力容器钢为研究对象,模拟其加热过程,采用扫描电子显微镜分析了其加热后表面氧化层的显微结构。结果表明:3.5Ni低温压力容器钢的氧化层分为疏松氧化层和致密氧化层,疏松氧化层冷却过程中易鼓起脱落,致密氧化层的外部为一层连续的镍铁金属富集层,将金属氧化物包裹其中,具有一定的强度和韧性,是3.5Ni低温压力容器钢氧化铁皮难以除尽的主要原因。The heating process was simulated by using 3.5Ni low temperature steel for pressure vessel as the research object. The scanning electron microscope was adopted to analysis the formation mechanism of surface oxide layer, results showed that the oxide layer of 3. 5 Ni lowtemperature steel for pressure vessel both contains loose oxide layer and dense oxide layer, where loose oxide layer will lead to plump up and take off during the cooling process. What＇s more, the external of dense oxide layer are continuous enrichmentlayer of nickel iron metal, making the metal oxide be packed and offera certainof strength and toughness, which is the main reason that result of difficult to completely eliminatethe iron oxideon the surface of 3.5Ni low temperature steel for pressure vessel.

关 键 词：3.5Ni 低温压力容器钢 氧化层 显微结构 除鳞 

分 类 号：TG157[金属学及工艺—热处理]