GI镀层CR1500HF热成形钢成形性能研究  

Research on Formability of CR1500HF Hot Forming Steel with GI Coating

作　　者：刘培星 孟宪明[2] 李洪亮[2] 王东坡[1] LIU Peixing;MENG Xianming;LI Hongliang;WANG Dongpo(School of Materials Science and Engineering,Tianjin University,Tianjin 300000,China;China Automotive Technology and Research Center,CATARC(Tianjin)Automotive Engineering Research Institute Co.,Ltd.,Tianjin 300300,China;Research Institute of Iron&Steel,Shandong Iron&Steel Group Rizhao Co.,Ltd.,Rizhao 276800,China)

机构地区：[1]天津大学材料科学与工程学院,天津300000 [2]中国汽车技术研究中心中汽研(天津)汽车工程研究院有限公司,天津300300 [3]山东钢铁集团日照有限公司钢铁研究院,山东日照276800

出　　处：《热加工工艺》2023年第20期48-51,共4页Hot Working Technology

摘　　要：GI镀层热成形钢服役过程中具有阴极保护作用且生产成本低,具有较好的应用前景。然而GI镀层热成形钢在高温变形过程中存在“液化金属诱导脆性(LMIE)”开裂问题。通过研究GI镀层热成形钢在不同温度下的高温拉伸性能和U型零部件拐角处涂层微观组织演变和开裂行为,重点分析GI镀层热成形钢成形工艺窗口和“液化金属诱导脆性开裂”机理。实验结果将为GI镀层热成形钢开发和加热成形工艺的制定提供参考。GI-coated hot forming steel has good application prospects,because of cathodic protection and low production cost.However,the problem of'liquid-metal-induced embrittlement(LMIE)'occurs during high temperature deformation of GI-coated hot forming steel.The hot tensile properties of GI-coated hot forming steel at different temperatures and microstructure evolution and cracking behavior of the coating at the corners of U-shaped parts were studied.The forming process window of GI-coated hot forming steel and mechanism of LMIE crack was analyzed.The results provide a reference for the development of GI-coated hot forming steel and the formulation of the hot forming process including heating and forming.

关 键 词：GI镀层 热成形钢 液化金属诱导脆性 高温拉伸 

分 类 号：TG142.1[一般工业技术—材料科学与工程]