Development Status of Continuous Casting Process for High-Carbon and High-Alloy Tool and Die Steel

doi:10.20057/j.1003-8620.2022-00104

Abstract

Abstract: This paper summarizes the reports of latest developments on industrial application of continuous casting technology in high speed steel production abroad. In addition, and summarizes some Chinese enterprises and research institutions have done some research and industrial trial production in this field. It is suggested to increase investment on the research and development of continuous casting technology of high carbon and high alloy steel grades. Compared with the traditional casting, the research shows that continuous casting can reduce the thickness of coarse carbide by 40% and the grain size by 50%,and the carbide pattern is also changed from flat and lamellar to fibrous, which will facilitate the carbide refinement in the subsequent forging and rolling process.Finally,it is proposed that the continuous caster straightening machine,water cooling process,billet cross-section size and finished forging ratio can be optimized. If a breakthrough can be male in current technology of mature arc continous casting machine,it will be condueive to improve the quality of casting billet,and achieue industrial application of high carbon and high alloy die steel casting.

Key words: High Speed Steel, Cold Working Die Steel, High-Carbon and High-Alloy Steel, Ledeburite Steel, Continuous Casting

摘要： 概述了国外有关连铸高速钢、工模具钢的工业化生产应用以及国内一些企业和研究机构围绕高碳高合金钢连铸技术做过的研究和工业试验。分析认为有必要加大高碳高合金钢连铸技术的开发和应用。相比于传统模铸，研究表明连铸可使粗大的碳化物厚度降低40%,晶粒尺寸降低50%,并且碳化物形貌也由平直片状转变为纤维状，这将有利于后续锻轧工艺的碳化物细化。最后提出了可在连铸矫直机、水冷工艺、铸坯截面尺寸以及成材锻压比方面进行优化改进，如果能够在现在技术成熟的弧形连铸机取得突破，这将更有利于提升铸坯质量，实现高碳高合金工模具钢连铸工业化应用。

关键词: 高速钢, 冷作模具钢, 高碳高合金钢, 莱氏体钢, 连铸

Yao Jian, Zhu Xida, Liu Yu, Dong Han. Development Status of Continuous Casting Process for High-Carbon and High-Alloy Tool and Die Steel[J]. Special Steel, 2022, 43(6): 66-72.

姚健, 朱喜达, 刘宇, 董瀚 . 高碳高合金工模具钢连铸工艺发展现状[J]. 特殊钢, 2022, 43(6): 66-72.

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