复合板轧制压下率对碳钢组织及相变的影响  

Effect of reduction rate on microstructure and transformation behavior of carbon steel by rolling clad plate

作　　者：黄庆学[1] 李海斌[1,2] 周存龙[1] 帅美荣[1] 刘光明[1] 马勤[2] 

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《材料热处理学报》2014年第3期149-153,共5页Transactions of Materials and Heat Treatment

基　　金：国家重点基础研究(973计划)预研专项(2011CB612204);国家青年科学基金(51205269;51105264);山西省基础研究项(2011021019-4);校博士启动基金(20122037)

摘　　要：研究热轧压下率对Q235A碳钢与304不锈钢复合板中碳钢组织的影响。结果表明:珠光体数量随压下率增加而增多,分布更加均匀,先共析铁素体随压下率先增加后减小。轧制形变试样产生内应力促进奥氏体的共析转变;碳原子从被压碎的晶粒内部向外部扩散,导致珠光体增加、先共析铁素体减少。轧制后晶粒细化及析出均匀的碳化物使材料抗拉强度提高。Microstructure evolution of Q235A carbon-304 stainless clad steel plate under different deformation conditions in hot rolling process was researched by SEM. The results show that the quantity of pearlite in the steel increases with increasing reduction rate, and the distribution of pearlite becomes more uniform. The quantity of pro-eutectoid ferrite firstly increases with increasing reduction rate because of internal stress promoting eutectoid reaction, and then decreases, for diffusion of carbon atom from the deformation grain to the ferrite. The tensile strength increases with the grain refinement and the uniformity of carbides in the steel.

关 键 词：压下率 内应力 相变 组织性能 

分 类 号：TG142.31[一般工业技术—材料科学与工程]