Technology Practice of VIM-VAR in Improving Fracture Toughness of Grade 0.3C-1.6Si-0.8Mn-l.1Cr-0.48Mo-0.1V Steel

何润; 李林森; 孙志诚

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Technology Practice of VIM-VAR in Improving Fracture Toughness of Grade 0.3C-1.6Si-0.8Mn-l.1Cr-0.48Mo-0.1V Steel

更新时间：2026-01-21

- Technology Practice of VIM-VAR in Improving Fracture Toughness of Grade 0.3C-1.6Si-0.8Mn-l.1Cr-0.48Mo-0.1V Steel
- Special Steel Vol. 40, Issue 2, Pages: 38-41(2019)
- 作者机构：
  
  1. 大冶特殊钢股份有限公司1特冶锻材研究所
  2. 特冶厂
  3. 工艺研究所,黄石,435001
  4. 大冶特殊钢股份有限公司高品质特殊钢湖北重点实验室,黄石,435001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：11 October 2018，
  
  Online First：19 May 2022，
  
  Published：19 May 2019
- 稿件说明：
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何润, 李林森, 孙志诚. Technology Practice of VIM-VAR in Improving Fracture Toughness of Grade 0.3C-1.6Si-0.8Mn-l.1Cr-0.48Mo-0.1V Steel[J]. Special Steel, 2019, 40(2): 38-41.
DOI：

何润, 李林森, 孙志诚. Technology Practice of VIM-VAR in Improving Fracture Toughness of Grade 0.3C-1.6Si-0.8Mn-l.1Cr-0.48Mo-0.1V Steel[J]. Special Steel, 2019, 40(2): 38-41. DOI：

摘要

超高强度钢（/%:0.3C-1.6Si-0.8Mn-1.1Cr-0.48Mo-0.1V）采用6 t真空感应加真空自耗双联工艺冶炼。通过对比真空感应工序不同浇注温度冶炼钢的组织和力学性能

结果表明

当VIM浇注温度从（1 600±10)°C 降至（1 560±10)℃时

带状评级结果从2.5级降为1级

断裂韧性均值从85 MPa. m

1/2

提高到116.3 MPa.m

1/2

。因此

低温浇注是改善材料均匀性的关键方法。

Abstract

Grade (/% ：0.3C-1.6Si-0. 8Mn-1.1Cr-0.48Mo-0.1 V)of ultra high strength steel has been melted by 6 t vacuum induction

vacuum arc remelting processes. Through comparing the structures and mechanical properties of this steel melt with different superheat degree

the test results show that the rating of banding structure decreases from 2.5 to 1 and the fracture toughness average value increases from 85 MPa . m

1/2

to 116. 3 MPa . m

1/2

when VIM casting temperature decreases from (1 600 ± 10) °C to (1 560 ± 10) °C . So the low temperature casting process is the key to improve the uniform of material.

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