An Investigation of the Mold-Flux Performance for the Casting of Cr12MoV Steel Using a Mold Simulator Technique

被引：11

作者：

Zhou, Lejun ^{[1
]}

Wang, Wanlin ^{[1
,2
]}

Xu, Chao ^{[1
]}

Zhang, Chen ^{[3
]}

机构：

[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, Natl Ctr Int Res Clean Met, Changsha, Hunan, Peoples R China

[3] Baosteel Grp Corp, Res Inst, Steelmaking Res Dept, Shanghai 201900, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2017年 / 48卷 / 04期

关键词：

MEDIUM-CARBON STEELS; HOT THERMOCOUPLE TECHNIQUE; RADIATIVE HEAT-TRANSFER; INITIAL SOLIDIFICATION; CRYSTALLIZATION BEHAVIORS; MOLTEN STEEL; SLAGS; FILM; OSCILLATION; POWDERS;

D O I：

10.1007/s11663-017-0990-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mold flux plays important roles in the process of continuous casting. In this article, the performance of mold flux for the casting of Cr12MoV steel was investigated by using a mold simulator. The results showed that the slag film formed in the gap between the initial shell and mold hot surface is thin and discontinuous during the casting process with the Flux BM, due to the absorption of chromic oxide inclusions into the liquid slag, while the slag film formed in the case of the optimized Flux NEW casting process is uniform. The main precipitated crystals in Flux BM slag film are cuspidine (Ca4Si2O7F2) and Cr3O4, but only Ca4Si2O7F2 precipitated in the Flux NEW case. Besides, both the responding temperature and heat flux in the case of Flux BM are relatively higher and fluctuate in a larger amplitude. The surface of the shell obtained in the case of the Flux BM experiment is quite uneven, and many severe depressions, cracks, and entrapped slags are observed in the surface due to the lack of lubrication. However, the obtained shell surface in the case of the Flux NEW shows good surface quality due to the addition of B2O3 and the adjustment of basicity, which can compensate for the negative effects of the mold-flux properties caused by the absorption of chromic oxide during the casting process. (C) The Minerals, Metals & Materials Society and ASM International 2017

引用

页码：2017 / 2026

页数：10