二次冷轧压下率对镀锡板组织性能的影响  

Effect of secondary cold rolling reduction rate on microstructure and properties of tinplate

作　　者：莫志英 方圆 刘伟 吴志国 王雅晴 孙超凡 MO Zhi-ying;FANG Yuan;LIU Wei;WU Zhi-guo;WANG Ya-qing;SUN Chao-fan(Tinplate Department,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200,Hebei,China;Research Institute of Technology,Shougang Group Co.,Ltd.,Beijing 100043,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司镀锡板事业部,河北唐山063200 [2]首钢集团有限公司技术研究院,北京100043

出　　处：《钢铁》2019年第12期70-74,共5页Iron and Steel

基　　金：国家重点研发计划专项资助项目(2017YFB0304004)

摘　　要：为了开发高硬度二次冷轧镀锡板,采用硬度计、拉伸试验机、光学显微镜和X射线衍射仪研究了二次冷轧压下率对氮强化镀锡板组织性能的影响规律。结果表明,随着二次冷轧压下率提高,试验钢的硬度和强度提高,各向异性增加,伸长率降低,当二次冷轧压下率为44%时可达到DR-9M的技术要求。同时采用高碳和氮强化成分体系配合低温退火不利于有利织构{111}的形成,织构取向密度的峰值出现在{001}<110>~{114}<110>、{223}<110>~{445}<110>和{554}<225>,冲压成形时易在45°方向上产生制耳。In order to develop high-hardness secondary cold-rolled tinplate,effects of the secondary cold rolling reduction on the microstructure and properties of the tinplate were studied by the hardness tester,tensile tester,optical microscope and X-ray diffractometer.The results showed that as the secondary cold rolling reduction rate increasing,the hardness and strength of the test steel increased,the anisotropy increases,and the elongation decreased.When the secondary cold rolling reduction rate was 44%,the DR-9 Mcan be achieved.At the same time,the use of high carbon and nitrogen fortification system combined with low temperature annealing is not conducive to the formation of favorable texture{111}.The peak of texture orientation density appears in{001}<110>~{114}<110>,{223}<110>~{445}<110> and{554}<225>,it is easy to produce ears in the 45°direction during stamping deformation.

关 键 词：镀锡板 氮强化 二次冷轧 组织 性能 

分 类 号：TG3[金属学及工艺—金属压力加工]