冷却速度对碳钢-不锈钢热压复合材料组织及力学性能的影响  

Effect of cooling rate on microstructure and mechanical properties of carbon steel and stainless steel composite

作　　者：李鹏博 阴树标[1] 李昭东[2] 刘宁 雷霆[4] Li Pengbo;Yin Shubiao;Li Zhaodong;Liu Ning;Lei Ting(College of Metallurgy and Energy,Kunming University of Science and Technology Kunming,Kunming Yunnan 650093,China;Iron and Steel Research Institute,Beijing 100081,China;Aerospace Materials and Technology Research Institute,Beijing 100076,China;Kunming Metallurgy College,Kunming Yunnan 650033,China)

机构地区：[1]昆明理工大学冶金与能源学院,云南昆明650093 [2]钢铁研究总院,北京100081 [3]中航天材料及工艺研究所,北京100076 [4]昆明冶金高等专科学校,云南昆明650033

出　　处：《金属热处理》2018年第12期120-125,共6页Heat Treatment of Metals

基　　金：国家重点研发计划(2017YFB0304700,2017YFB0304702);中国钢研科技集团有限公司青年创新基金(事16G61040B)

摘　　要：本试验以Gleeble-1500D热模拟试验机模拟实际工业生产中的热轧复合。冷却速度是影响界面结合效果的一个重要参数,本次试验中采取了0. 1、0. 5、1、22℃/s这4组不同的冷速来研究碳钢-不锈钢结合界面的组织以及力学性能的变化。结果表明,随着冷速的增加,原子扩散距离变短。界面附近脱碳层厚度变薄,碳钢侧开始出现针状铁素体组织,在22℃/s时碳钢侧组织直接转变为贝氏体,使脱碳层消失。而相应的当冷速为0. 5℃/s时剪切强度最小为325 MPa,22℃/s时剪切强度最大为520 MPa。The actual industrial production of hot-rolled composite is simulated by the Gleeble-1500D thermal simulation test machine.The cooling rate is an important parameter that affects the bonding effect of the interface.In this test,four different cooling rates of 0.1,0.5,1and 22℃/s were used to study the microstructure and mechanical properties of the carbon steel-stainless steel bonding interface.The results show that with the increase of cooling rate,the atom diffusion distance becomes shorter.The thickness of the decarburized layer near the interface becomes thinner,and the acicnlar ferrite structure begins to appear on the carbon steel side,and the microstructure of carbon steel side directly changes to bainite,which lead to disappear of decarburized layer when the cooling rate is 22℃/s.The corresponding when the cooling rate of 0.5℃/s,the minimum shear strength is 325MPa,and the maximum shear strength is 520MPa when the cooling rate of 22℃/s.

关 键 词：热轧复合 冷却速度 剪切强度 

分 类 号：TG335.8[金属学及工艺—金属压力加工]