“针状”先共析铁素体形成及对钢丝性能的影响  

Formation of needle like proeutectiod ferrite and its influence on medium carbon steel wire properties

作　　者：刘礼华 蔡磊 赵敏 杨恒 谢超英[2] 

机构地区：[1]江苏法尔胜技术开发中心,江苏江阴214433 [2]上海交通大学材料与工程学院教育部高温材料与高温测试开放试验室,上海200030

出　　处：《材料科学与工艺》2005年第6期659-661,664,共4页Materials Science and Technology

基　　金：江苏省科技基金资助项目(BK2001215)

摘　　要：运用膨胀法及显微组织观察分析了35#钢连续加热和冷却过程中相变特点,讨论了经正火处理的中碳钢组织中出现一定量的“针状”先共析铁素体形成原因．通过对正火处理的35#钢丝室温拉伸变形行为测试与分析,发现其呈现两个阶段屈服变形行为,两次屈服分别对应于先共析铁素体与珠光体塑性屈服．Phase transformations in the cooling process of medium 35# carbon steel after continuously heating have been investigated by a dilatometer and microstructure observation. The formation of needle like proeutectiod ferrite in the medium carbon normalized structure has been discussed. The tensile behavior of 35# steel after continuous heating and cooling treatment has been analyzed. Two yield stages appeared which correspond to the yield processes of proeutectiod ferrite and pearlite, respectively.

关 键 词：“针状”先共析铁素体 35#钢丝性能 相变 

分 类 号：TG142[一般工业技术—材料科学与工程]