热加工对复合板不锈钢表层晶间腐蚀的影响-表面技术.PDF

摇 第42卷摇 摇 第1期摇 摇 2013 年2 月 表面技术 摇 摇 摇 Vol.42摇 No.1摇 Feb.2013 SURFACE TECHNOLOGY 摇摇摇 25 热加工对复合板不锈钢表层晶间腐蚀的影响 王春雨,覃春林,王鑫宇 (哈尔滨工业大学(威海) 材料科学与工程学院,威海264209) 摇 摇 [摘摇 要]摇 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。 [关键词]摇 复合板;不锈钢;晶间腐蚀;热加工 [中图分类号]TG172.9;TG156 摇 摇 摇 [文献标识码]A摇 摇 摇 [文章编号]1001鄄3660(2013)01鄄0025鄄04 Effects of Hot Working on Intergranular Corrosion on Composite for Stainless Steel Plate Surface WANG Chun鄄yu,QIN Chun鄄lin,WANGXin鄄yu (School of Materials Science and Engineering,Harbin Institute of Technology at Weihai,Weihai264209,China) [Abstract]摇 It is researched that the intergranular corrosion behavior of composite plates,with low alloy steel and stain鄄 less steel,for pressure vessel after hot working. The intergranular corrosion characteristics after hot working for three common stainless steels304,321and316Lhavebeen discussed. Theresultsshow that compositeplatesafter explosive cladding,micro鄄 structure of321steel showsapitting corrosion characteristic,but hasalittle step structures,the structuresof304 steel isobvi鄄 ous types of intergranularcorrosion,andneedtoimprovebyheattreatment;Moreover,that characterof316Lsteel ismost seri鄄 ous,the processes of heat treatment is need reduce. The process of 321steel,heat treatment is not excess,which would cause intergranular corrosion,butthetendency of intergranularcorrosionfor321islighterthan316L. Effectsof heattreatment on304 steel are obvious,intergranular corrosion tendency is the most seriously in three