R4 级海洋系泊链φ140 mm 圆钢的开发

特殊钢 ›› 2006, Vol. 27 ›› Issue (5): 43-45.

R4 级海洋系泊链φ140 mm 圆钢的开发

钱刚^1.2 雷应华² 陈长西² 郑文超² 陈君²

1北京科技大学冶金与生态工程学院，北京100083;
2大冶特殊钢股份有限公司，黄石435001

收稿日期:2006-05-10 出版日期:2006-10-01 发布日期:2023-04-20
作者简介:钱刚(1966-),男，高级工程师，《特殊钢》编委会副主任委员，上海大学毕业，从事特殊钢冶金和工艺研究。

Development of φ140 mm Round Bar for R4 Offshore Mooring Chain

Qian Gang¹²,Lei Yinghua²,Chen Changxi²,Zheng Wenchao²， Chen Jun²

1 School of Metallurgy and Ecological Engineering,University of Science and Technology,Beijing 100083;
2 Daye Special Steel Corp Ltd,Huangshi 435001

Received:2006-05-10 Published:2006-10-01 Online:2023-04-20

摘要/Abstract

摘要： 大冶特钢采用60tEBT 电弧炉-70 tLF 精炼+RH 脱气-3流350mm×470 mm方坯连铸机-850 mm 初轧+750mm 半连轧工艺生产了成分(%)为0.21C、1.45Mn、1.44Cr、1.21Ni、0.49Mo、0.07Nb φ140 mm R4 级系泊链钢。结果表明，通过LF 精炼45 min,喂Al线和Ca-Si线脱氧后，进行RH≤66.65 Pa真空处理20 min+ 软吹氩≥10min,使系泊链钢成品中的氧含量达14.8×10^-6,氮含量69.8×10^-6,氢含量1.2×10^-6,偏析和疏松0.5级，夹杂物0~1级， -40℃时冲击功≥100J,各类指标均满足标准要求。

Abstract: The φ140 mm of steel(0.21C,1.45Mn,1.44Cr,1.21Ni,0.49Mo,0.07Nb)for R4 of fshore mooring chain was produced at Daye Steel by 60 t EBT are fumnace -70 t LF refining + RH vacuum degassing -3 strand 350mm×470 mm billet caster -850 primary mill blooming -750 semi-continuous mill rolling process. The re- sults showed that with LF refining for 45 min,feeding Al wire and Ca-Si wire deoxidizing,then ≤66.65 Pa RH vacuum degassing for 20min + soft argon blowing for ≥10 min,the oxygen content in finished products of steel for off shore mooring chain was 14.8×10-6,nitrogen content 69.8×10^-6,hydrogen content 1.2×10^-6,segregation porosity rating were 0.5,inclnsion rating 0～1, impact energy at -40 ℃≥100 and each index met the require ment of standard.

钱刚, 雷应华, 陈长西, 郑文超, 陈君. R4 级海洋系泊链φ140 mm 圆钢的开发[J]. 特殊钢, 2006, 27(5): 43-45.

Qian Gang¹², Lei Yinghua², Chen Changxi², Zheng Wenchao² , Chen Jun². Development of φ140 mm Round Bar for R4 Offshore Mooring Chain[J]. Special Steel, 2006, 27(5): 43-45.