低成本高性能低碳铆螺钢的试验研究  

Investigation of low-cost and high-performance low carbon cold heading steel

作　　者：李壮[1] 吴迪[2] 张金明[3] 李平瑞 郑振[1] 康少酺[1] 

机构地区：[1]沈阳航空航天大学材料科学与工程学院,沈阳110136 [2]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110004 [3]沈阳标准件研究所,沈阳110141 [4]沈阳标准件有限公司紧固件厂,沈阳110141

出　　处：《沈阳航空航天大学学报》2012年第5期24-28,共5页Journal of Shenyang Aerospace University

基　　金：国家自然科学基金资助项目(项目编号:50334010);东北大学国家重点实验室开放课题(项目编号:12sys05)

摘　　要：通过冷镦螺栓试验,研究了控轧控冷对低碳铆螺钢力学性能的影响。结果表明,控轧控冷造成铆螺钢的铁素体晶粒细化,珠光体的层片间距减小。低碳铆螺钢采用控轧控冷的抗拉强度达到500 MPa以上,其力学性能远优于常规轧制后不控轧控冷的同样试样。经控轧控冷后的低碳铆螺钢原料冷镦成螺栓,产品的力学性能满足5.8级螺栓国家标准的相应要求。实现了以低碳代中碳的5.8级螺栓的生产。Effects of controlled rolling and cooling on the mechanical properties of low carbon cold heading steel were investigated by cold heading bolt. The results show that the ferrite grains were refined and the in- teflamellar spacing in pearlite colonies was thinned due to controlled rolling and cooling. The mechanical properties of the low carbon bar with controlled roiling and cooling were better than that of roiled conven- tionally, and tensile strength reached 500MPa grade. The cold heading steel can be directly used to fabricate bolts from hot rolled bar, and the mechanical properties of the finished bolts can meet the standard of class 5.8 bolts. Low carbon steel might be expected to be a substitute for medium carbon steel in the production of class 5.8 bolts.

关 键 词：低碳铆螺钢 控轧控冷 5 8级螺栓 

分 类 号：TG333.7[金属学及工艺—金属压力加工]