新型汽车覆盖件钢板性能研究  

Research on the Properties of the New Steel for Automotive Covering Parts

作　　者：张钧萍[1] 方刚[1] 路洪洲 金磊 关建东[3] 郭爱民 Zhang Junping;Fang Gang;Lu Hongzhou;Jin Lei;Guan Jiandong;Guo Aimin(China Automotive Engineering Research Institute Co.,Ltd.,Chongqing 401122;CITIC Metal Ningbo Energy Co.,Ltd.,Beijing 100004;Beijing Shougang Co.,Ltd.,Beijing 100043)

机构地区：[1]中国汽车工程研究院股份有限公司,重庆401122 [2]中信金属宁波能源有限公司,北京100004 [3]北京首钢股份有限公司,北京100043

出　　处：《汽车工艺与材料》2024年第6期1-5,共5页Automobile Technology & Material

基　　金：中信铌钢发展奖励基金项目(CMVIC-HT-2023-3278)。

摘　　要：UF340作为一种新型超细晶高强钢,在汽车外覆盖件的应用上具有替代HC180BD的潜力,研究了UF340力学性能和成形性能。结果表明,在塑性、加工硬化指数和各向异性方面,UF340与HC180BD具有相似的力学性能,与HC180BD相比UF340没有明显的烘烤硬化性,2种材料的成形性能基本一致。通过Keeler模型计算获得UF340的成形极限曲线与成形试验结果存在一定差异,采用线性分段拟合方式获得的成形极限图与试验结果吻合度更高,采用该方法获得的成形极限曲线可为新材料的成形应用提供参考。As a new type of ultra-fine grained high-strength steel,UF340 has the potential to replace HC180BD in automotive exterior panels.This paper investigated its mechanical properties and formability.The results indicate that UF340 and HC180BD have similar mechanical properties in terms of plasticity,processing hardening index,and anisotropy,but UF340 does not exhibit significant bake hardening properties.The formability of the two materials is similar.There is certain difference between the forming limit curve calculated by the Keeler model and the forming test results.The forming limit diagram obtained by linear segment fitting data has a higher degree of agreement with the experiment,the forming limit curve obtained by this method can provide a reference on the forming application of new materials.

关 键 词：UF340 超细晶粒钢 力学性能 成形极限图 

分 类 号：U465.11[一般工业技术—材料科学与工程]