控轧控冷对低碳铆螺钢力学性能的影响  

Effect of Controlled Rolling/Cooling on Mechanical Properties of Low-Carbon Cold Heading Steel

作　　者：李壮[1] 吴迪[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2008年第4期525-528,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50334010);沈阳市应用基础研究项目(1071198-1-00)

摘　　要：对低碳铆螺钢采用两次控轧控冷试验,结果表明,铁素体晶粒尺寸比珠光体形态对低碳铆螺钢力学性能的影响要大.低温轧制较常规轧制后控冷可以获得更好的力学性能.在奥氏体化工艺参数非常合理的条件下,通过控轧控冷使铁素体晶粒细化的同时,避免魏氏组织产生,能够获得最佳的力学性能.采用控轧控冷,有可能实现以低碳代替中碳免热处理490 MPa级铆螺钢的实际生产.Double experiments of controlled rolling/cooling process were carried out on a lab mill and the results showed that the effect of ferrite grain size on the mechanical properties is greater than that of pearlite morphology for the low-carbon cold heading steel. The mechanical properties of the specimens rolled at low temperature are better than rolled conventionally. Best mechanical properties could be obtained by the controlled rolling/cooling process for ferrite grain refining and avoid the formation of Widmastatten structure under conditions that the austenitizing parameters are set very reasonably. In such a way it might be expected to substitute low-carbon for mediumcarbon in production of 490 MPa grade cold heading steel without heat-treatment.

关 键 词：控轧控冷 奥氏体化 铁素体晶粒尺寸 珠光体 力学性能 

分 类 号：TG142.41[一般工业技术—材料科学与工程]