摘要
介绍(O)12.5 mm SWRH82B热轧线材的质量要求,其化学成分w(C)为0.79%~0.83%,w(Si)为0.15%~0.35%,w(Mn)为0.60%~ 0.90%,w(P)≤0.020%,w(S)≤0.015%;线材金相组织应控制为索氏体;内控标准要求抗拉强度Rm≥1140 MPa,断面收缩率Z≥30%,不圆度≤0.30 mm.通过控轧控冷实践,得出合理的热轧工艺:开轧温度1020~1060℃,进精轧温度880~920℃;终轧温度930~ 970℃,吐丝温度820~860℃.
To introduce the quality requirement of diameter 12.5 mm SWRH82B hot rolling wire rod,its chemical component w(C) is 0.79% ~0.83%,w(Si) is 0.15% ~0.35%,w(Mn)is 0.60% ~0.90%,w(P) ≤0.020%,w(S) ≤0.015%;microstructure of the wire rod should be sorbite;internal control standard require tensile strength Rm ≥1140MPa,reduction of cross section Z ≥ 30%,non-circularity ≤ 0.30 mm.Through the controlled rolling and cooling practice,get the reasonable hot rolling process:start rolling temperature is 1020 ~ 1060 ℃,the temperature when entering the finishing mill is 880 ~ 920 ℃;the finishing rolling temperature is 930 ~ 970 ℃,the laying temperature is 820 ~ 860 ℃.
出处
《金属制品》
2016年第3期35-37,共3页
Metal Products
关键词
SWRH82B热轧线材
金相组织
控轧控冷
力学性能
表面脱碳
SWRH82B hot rolling wire rod
microstructure
controlled rolling and cooling
mechanical property
surface decarburization