Abstract: The non-quenched and tempered steel 36Mn2V (0.34～0.38C,1.45～1.70Mn, 0.11～0. 16V, 0.020Als)was produced by hot metal pretreated -120 t converter melting -predeoxidizing by Pl deoxidizing agent with main component CaC₂,then alloying-LF + RH refining-280 mm × 380 mm billet concasting process at Panzhihua Steel. The analysis and examination results showed that the average yield of alloy element Si,Mn and V was respectively 85.8%, 98.0% and 96.0%,and the T[O] of 140 mm round tube billet was 6.4×10^-6～13.0×10^-6 (average 9.1×10^-6),the [N] was 28.0×10^-6～59.0×10^-6,and the metallurgical quality of tube billet all met to the requirement of technical standard.

Key words: N80 Grade Non-Quenched and Tempered Steel, Tube Blank, Converter, LF + RH

摘要： 攀钢采用铁水预处理120 t转炉冶炼-主要成分为CaC₂的P1脱氧剂预脱氧、合金化-LF+RH精炼- 280 mm×380 mm方坯连铸工艺生产36Mn2V非调质钢(%:0.34～0.38C、1.45～1.70Mn、0.11～0.16V、≤0.020Ms)。分析和检验结果表明,Si、Mn、V合金元素的平均收得率分别为85.8%、98.0%和96.0%;140 mm圆管坯的T[O]为(6.4～13.0)×10^-6(平均9.1×10^-6),[N]为(28.0～59.0)×10^-6,管坯的冶金质量均满足技术条件的要求。

关键词: N80级非调质钢, 管坯, 转炉, LF+RH