农用收割机滚筒用440MPa冷轧钢带的研发与制备  

Development and Preparation of 440 MPa Cold Rolled Steel Strip for Agricultural Harvester Roller

作　　者：魏兵兵 孙乾 张波 刘智广 杨希国 李承 WEI Bingbing;SUN Qian;ZHANG Bo;LIU Zhiguang;YANG Xiguo;LI Cheng(Operation Management Department,Laiwu Branch,Shandong Iron and Steel Co.,Ltd.,Jinan 271104,China;Laiwu Iron and Steel Group Yinshan Section Steel Co.,Ltd.,Jinan 271104,China;Coking Plant,Laiwu Branch,Shandong Iron and Steel Co.,Ltd.,Jinan 271104,China)

机构地区：[1]山东钢铁股份有限公司莱芜分公司运营管理部,山东济南271104 [2]莱芜钢铁集团银山型钢有限公司,山东济南271104 [3]山东钢铁股份有限公司莱芜分公司焦化厂,山东济南271104

出　　处：《山东冶金》2024年第4期34-36,共3页Shandong Metallurgy

摘　　要：针对农用收割机滚筒制造用钢提出的母材均质化、高强度、易成型的质量提级需求,采用低碳、低硅、高锰,加铌、钛的微合金化成分设计,配合控轧控冷及罩式退火工艺,成功研制开发了农用收割机滚筒用440MPa冷轧钢带。所得冷轧退火钢带组织以铁素体+点状(部分球状)渗碳体为主,屈服强度≥350MPa,抗拉强度≥450MPa,断后伸长率≥27%,钢带综合性能较好,保证强韧性的基础上,兼顾较好的折弯成型及焊接性,实现了低成本、高性能农用车制造专用钢带的批量制备,满足农用收割机滚筒制造加工要求。In order to meet the demand of homogenization,high strength and easy forming of the base metal,the 440 MPa cold-rolled steel strip for agricultural harvester drum was successfully developed by using the micro-alloying composition design of low carbon,low silicon,high manganese,plus niobium and titanium,combined with the controlled rolling and cooling and the cover annealing process.The obtained cold-rolled annealed steel strip is mainly composed of ferrite+point-like(partially spherical)cementite,with yield strength is more than 350 MPa,tensile strength is more than 450 MPa,elongation after fracture is more than 27%.The overall performance of the steel strip is good,and on the basis of ensuring strength and toughness,good bending and weldability are taken into account.The production of low cost and high performance special steel belts for agricultural vehicle manufacturing can meet the requirements of agricultural harvester drum manufacturing and processing.

关 键 词：收割机滚筒 440MPa冷轧钢带 控轧控冷 金相组织 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]