形变量和冷却速度对SCM435冷镦钢形变诱导铁素体相变的影响  

Effect of Deformation and Cooling Rate on Deformation-Induced Ferrite Transformation in SCM435 Cold Heading Steel

作　　者：陈继林 冯光宏[1] 杨栋 薛正国 马洪磊 张宏亮[1] 王宝山[1] 马健 Chen Jilin;Feng Guanghong;Yang Dong;Xue Zhengguo;Ma Honglei;Zhang Hongliang;Wang Baoshan;Ma Jian(Metallurgical Technology Institute,Central Iron and Steel Research Institute,Beijing 100081;Xingtai Iron and Steel Co Ltd,Xingtai 054027;Hebei Engineering Research Center for Wire Rod,Xingtai 054027)

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081 [2]邢台钢铁有限责任公司,邢台054027 [3]河北省线材工程技术研究中心,邢台054027

出　　处：《特殊钢》2021年第3期12-15,共4页Special Steel

摘　　要：通过热模拟试验研究了两相区轧制,研究了形变量(15%-40%)和冷却速度0.8℃/s和1.2℃/s对SCM435冷镦钢的形变诱导铁素体相变的影响。结果表明:SCM435钢在奥氏体和铁素体两相区(750~850℃)轧制,在0.8℃/s的冷速下,随形变量增加,形变诱导铁素体体积分数呈升高趋势,并存在粒状珠光体组织,硬度呈先降低再升高的趋势;在1.2℃/s的冷速下,随形变量增加,形变诱导铁素体体积分数呈降低趋势,并出现了粒状贝氏体组织,硬度呈升高趋势。The effect of rolling with 15%~40%and cooling rate 0.8℃/s and 1.2℃/s in dual phase rigon on deformation-induced ferrite transformation in SCM435 cold-headed steel is studied by thermal simulation test.The results show that rolling of SCM435 steel in the austenite and ferrite two-phase zone(750~850℃),at a cooling rate of 0.8℃/s,with amount of deformation increasing,the deformation-induced ferrite volume fraction increases,and there is a granular pearlite structure,and the hardness first decreases and then increases;at a cooling rate of 1.2℃/s,with amount of deformation increasing,the deformation-induced ferrite volume fraction decreases,and a granular bainite structure appears,and the hardness increases.

关 键 词：形变量 SCM435钢 形变诱导铁素体相变 硬度 冷却速度 

分 类 号：TG142.1[一般工业技术—材料科学与工程] U466[金属学及工艺—金属材料]