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.
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)
关键词
低碳铆螺钢
控轧控冷
5
8级螺栓
low carbon cold heading steel
controlled rolling and cooling
class 5.8 bolts
