Effect of EAF-VOD-VAR and VIM-VAR Metallurgical Process on Toughness of Ultra-high Strength Steel G50

Special Steel ›› 2008, Vol. 29 ›› Issue (1): 60-61.

Effect of EAF-VOD-VAR and VIM-VAR Metallurgical Process on Toughness of Ultra-high Strength Steel G50

Xia Zhixin^1,2, Yang Zhuoyue², Li Baocheng¹, Chen Jiayan²

1 College of Materials Science and Engincering, Zhongbei University,Taiyuan 030051;
2 Institute for Science Materals,China lron & Steel Research Institute Croup, Beijing 100081

Received:2007-08-31 Online:2008-02-01 Published:2022-12-16

EAF-VOD-VAR和VIM-VAR冶炼工艺对G50超高强度钢韧性的影响

夏志新^{1 ,2}, 杨卓越², 李保成¹, 陈嘉砚²

1 中北大学材料科学与工程学院，太原030051;
2 中国钢研科技集团公司结构材料研究所，北京100081

作者简介:夏志新(1982-),男，硕士研究生，从事超高强度钢强韧化机理研究。

Abstract

Abstract: Inclusion and mechanical properties of ultra-high strength steel G50(0.28～0.29C,1.88~1.98Si,4.45 ~4.49Ni,1.04～1.05Gr,0.57～0.61Mo,0.031~0.034Nb)melied by two process VIM-VAR and EAF-VOD-VAR have been studied. Results showed that the inclusion rating units of steel G50 melted by EAF-VOD-VAR process were low- er han that melied by VIM-VAR proccss,and the oughmess of steel G50(A_Ku286~88J,K_Ic 130～132 MPa . m^1/2)was obviously higher than that(A_Ku270~74J,K_Ic112~118 MPa . m^1/2)of steei G50 melted by VIM-VAR process.

摘要： 研究了真空感应熔炼+真空自耗重熔(VIM-VAR)和电弧炉+真空-氧脱碳+真空自耗重熔(EAF- VOD-VAR)法两种工艺冶炼的超高强度钢G50%:0.28～0.29C、1.88～1.98Si、4.45～4.49Ni、1.04～1.05Cr、0.57～0.61Mo、0.031～0.034Nb)的夹杂物和机械性能。结果表明,EAF-VOD-VAR法冶炼的G50钢夹杂物级别低于VIM-VAR法冶炼的G50钢的夹杂物级别;EAF-VOD-VAR法冶炼的1350钢的韧性(A_KU2 86～88 J,K_IC130～132 MPa·m^1/2)明显高于VIM-VAR法冶炼的G50钢的韧性(A_KU270～74 J,K_IC 112～118 MPa·m^1/2)。

关键词: 超高强度钢G50, VIM-VAR, EAF-VOD-VAR, 夹杂物, 韧性

Xia Zhixin, Yang Zhuoyue, Li Baocheng, Chen Jiayan. Effect of EAF-VOD-VAR and VIM-VAR Metallurgical Process on Toughness of Ultra-high Strength Steel G50[J]. Special Steel, 2008, 29(1): 60-61.

夏志新 , 杨卓越, 李保成 , 陈嘉砚. EAF-VOD-VAR和VIM-VAR冶炼工艺对G50超高强度钢韧性的影响[J]. 特殊钢, 2008, 29(1): 60-61.