不锈钢拉伸变形量与马氏体转变的关系.pdfVIP

学兔兔 第44卷 第2期 石 油 化 工 设 备 Vo1．44 NO．2 2015年 3月 PETR()-CHEMICAL EQUIPMENT Mar．2O15 文章编号：1000—7466(2015)02—0022—05 不锈钢拉伸变形量与马氏体转变的关系 马其坤 (唐山工业职业技术学院建筑化工系，河北唐山 063020) 摘要：在室温条件下对$30408和$30403两种牌号的奥氏体不锈钢试样进行拉伸试验并测定马氏 体相变量。结果表明，随着拉伸变形量的增加，均诱发产生了形变马氏体，且形变诱发产生的马氏 体质量分数随着变形量的增加迅速增加，并在拉断前逐渐趋于饱和。不锈钢q-常见的合金元素均 使马氏体转变开始温度(M )点降低，以碳的影响最为明显。马氏体的形成使形变强化指数不断提 高，从而抑制裂纹的形成和扩展，使不锈钢在未发生明显裂纹或缩颈现象的情况下突然断裂。 关键词：奥氏体不锈钢；拉伸变形；马氏体 中图分类号：TQo5o．41；TG142．71 文献标志码：A doi：10．3969／]．issn．1000—7466．2015．02．005 Stainless Steel Tensile Deformation to Martensite Transformation MA Qi_kun (Management Engineering Department，Tangshan Industrial Professional Technology Institute，Tangshan 063020，China) Abstract：The tensile test of austenitic stainless steel of$30408 and$3O4O3 specimen was done at rooj]1 temperatHre．The martensite phase variables were measured using ferrite measuring in— strument．The resuhs showed that the martensite induced with the increase of tensile deforma— tion．With the increase of deformation，martensite increased rapidly．And in front of the snap， the martensite content tended to be saturated．Common alloying element in stainless steel made M Doint reduced，and the most obvious impact was carbon．The formation of martensite of stain一 1ess steel increased deformation reinforcement index that inhibited the formation and extension of cracks．The stainless stee1 was ruptured suddenly in no obvious cracks or necking phenomenon． KeV words：austenitic stainless steel；tensile deformation；ma