800MPa调质高强钢宽厚板的开发  

Development of 800 MPa Grade Quenched and Tempered Wide and Heavy Steel Plate

作　　者：罗毅[1] 鲍海燕[2] 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080 [2]武汉钢铁集团鄂城钢铁有限责任公司,湖北鄂州436002

出　　处：《山东冶金》2017年第5期19-20,共2页Shandong Metallurgy

摘　　要：介绍了800 MPa调质高强钢宽厚板的开发情况,采用C-Mn-Cr-Mo及微合金化的成分设计,结合热轧+调质工艺生产了厚60 mm、宽3 800 mm、成品单重约20 t的钢板,钢板质量满足交货要求,钢板组织为回火马氏体和贝氏体,在原奥氏体晶粒内部呈不同方向的板条束排列,将原奥氏体晶粒分割成若干区域,从而保证了钢板具有高强度和高韧性的匹配。The article introduces development of 800 MPa grade quenched and tempered wide and heavy steel plate. The steel plates with thickness of 60 nun, width of 3 800 ram, and weight of about 20 tons are designed by C-Mn-Cr-Mo and micro-alloyed such as Nb, V, Ti, etc., and produced by hot rolling and quenched and tempered processing. Their qualities satisfy the requirements of the delivery, and their mierostructure was the tempered marlensite and bainite observed by the optical microscope. The results show that original austenite grains are divided into martensite and bainite packets with different direction, thus ensuring the high strength and high toughness of the steel plate.

关 键 词：800MPa级高强钢 宽厚板 调质 组织 

分 类 号：TG335.51[金属学及工艺—金属压力加工]