高碳盘条SWRH82B再结晶型控制轧制与冷却工艺的优化研究  

Optimization Research on Controlled Rolling and Cooling process of High-carbon Wire Rod SWRH82B Recrystallization

作　　者：胡波[1] 郭善莉 张长静[1] 包喜荣[3] 

机构地区：[1]包钢集团包头天诚线材有限公司,内蒙古包头014010 [2]包钢集团轨梁厂,内蒙古包头014010 [3]内蒙古科技大学材料和冶金学院,内蒙古包头014010

出　　处：《热加工工艺》2014年第19期140-142,146,共4页Hot Working Technology

基　　金：包钢攻关项目(00610137)

摘　　要：以高碳盘条SWRH82B为研究对象,基于精轧工艺,采用Gleeble-1500D热模拟试验机对高速线材精轧F1~F4道次变形进行了热模拟,研究了其再结晶行为,确定出最佳精轧出、入口温度;同时测定了试验钢的连续冷却转变曲线。通过分析冷却速度对82B盘条组织演变规律的影响,对轧件吐丝后在斯太尔摩冷却线上的冷却工艺进行优化。结果表明：最佳精轧出、入口温度分别为1020、950℃;当冷速范围为6~8℃/s时索氏体组织片间距最为细小,直到冷却速度10℃/s时才不形成马氏体。研究成果能为82B线材控轧控冷以及组织性能控制提供实验依据。Taking the high carbon wire SWRH82 B as the study object, based on the finishing process, hot deformation of F1-F4 pass finishing rolling high speed wire rod was simulated by using Gleeble-1500 D thermal simulation machine. The recrystallization behavior was studied. And the optimum entry and exit temperature of the finishing rolling were ascertained.The continuous cooling transformation curves of the test steel were measured. Through analyzing the effect of cooling rate on microstructural evolution of 82 B wire rod, the cooling technology of workpiece after spinning in Stelmor cooling line was optimized. The results show that the optimum entry and exit temperature of the finishing rolling are 950℃ and 1020℃respectively; the lamella distance of sorbite microstructure is the smallest when the cooling rate is from 6℃/s to 8℃/s, and martensite does not form until the cooling rate arrives at 10℃/s. The research results can provide experimental basis for controlled rolling and controlled cooling as well as control of microstructure and mechanical properties of 82 B wire rod.

关 键 词：82B线材 再结晶 控制轧制 连续冷却转变曲线 索氏体 

分 类 号：TG335[金属学及工艺—金属压力加工]