热加工对复合板不锈钢表层晶间腐蚀的影响  

Effects of Hot Working on Intergranular Corrosion on Composite for Stainless Steel Plate Surface

作　　者：王春雨[1] 覃春林[1] 王鑫宇[1] 

机构地区：[1]哈尔滨工业大学(威海)材料科学与工程学院,威海264209

出　　处：《表面技术》2013年第1期25-28,共4页Surface Technology

基　　金：国家自然科学基金(NSFC No.51202044);山东省自然科学基金(ZR 2011 EMM013)

摘　　要：对压力容器用低合金钢/不锈钢复合板在热加工后的晶间腐蚀行为进行研究,主要针对三种常用表层不锈钢304,321及316L热加工后的晶间腐蚀特性进行探讨。结果表明:表层不锈钢中,321钢存在少量阶梯组织,接近凹坑组织,过多的热处理工序会引起其晶间腐蚀,但程度上轻于316L钢;304钢为明显的晶间腐蚀类型,受热处理的影响较大,严格控制热加工工艺可使其晶间腐蚀的倾向相对最轻;316L钢热加工过程中的晶间腐蚀倾向最为严重,应尽量减少热处理。合金元素较多的钢种(321和316L)在敏化温度热处理后,晶间腐蚀特征改变不大;低碳不锈钢(304)经热处理后,晶间腐蚀所受影响较大。It is researched that the intergranular corrosion behavior of composite plates, with low alloy steel and stainless steel, for pressure vessel after hot working. The intergranular corrosion characteristics after hot working for three common stainless steels 304,321 and 316L have been discussed. The results show that composite plates after explosive cladding, microstructure of 321 steel shows a pitting corrosion characteristic, but has a little step structures, the structures of 304 steel is obvious types of intergranular corrosion, and need to improve by heat treatment; Moreover, that character of 316L steel is most serious, the processes of heat treatment is need reduce. The process of 321steel, heat treatment is not excess, which would cause intergranular corrosion, but the tendency of intergranular corrosion for 321 is lighter than 316L. Effects of heat treatment on 304 steel are obvious, intergranular corrosion tendency is the most seriously in three steels after hot working. Steel with more alloy elements （321, 316L）, the heat treatment is lower sensitive than mild steel after heat treatment at sensitizing temperature, therefore, for mild stainless steel （304）, intergranular corrosion characteristics has little obvious if heat treatment has strictly controlled. The heat treatment of mild stainless steel has significant effects, hot working process can have more effects of intergranular corrosion tendency.

关 键 词：复合板 不锈钢 晶间腐蚀 热加工 

分 类 号：TG172.9[金属学及工艺—金属表面处理] TG156[金属学及工艺—金属学]