Effect of Heating Temperature on Decomposition Transition Behavior of M<sub>2</sub>C Carbide in High-vanadium High-speed Steel

Cao Yulong; Zhang Saikang; Wang Xiuxiu; Ma Chongsheng; Li Guangqiang

doi:10.20057/j.1003-8620.2024-00076

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Effect of Heating Temperature on Decomposition Transition Behavior of M₂C Carbide in High-vanadium High-speed Steel

Forming and Phase Transition | 更新时间：2025-05-09

- Effect of Heating Temperature on Decomposition Transition Behavior of M₂C Carbide in High-vanadium High-speed Steel
- Special Steel Vol. 45, Issue 4, Pages: 146-152(2024)
- 作者机构：
  
  1.武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室，武汉 430081
  2.武汉科技大学省部共建耐火材料与冶金国家重点实验室，武汉 430081
  3.东风商用车有限公司技术中心，武汉 430056
- 作者简介：
- 基金信息：
- DOI：10.20057/j.1003-8620.2024-00076
  CLC： TG161
- Received：27 March 2024，
  
  Published：30 July 2024
- 稿件说明：
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曹玉龙,张赛康,汪秀秀等.加热温度对高钒高速钢中M₂C碳化物分解转变行为的影响[J].特殊钢,2024,45(04):146-152.

Cao Yulong,Zhang Saikang,Wang Xiuxiu,et al.Effect of Heating Temperature on Decomposition Transition Behavior of M₂C Carbide in High-vanadium High-speed Steel[J].Special Steel,2024,45(04):146-152.
曹玉龙,张赛康,汪秀秀等.加热温度对高钒高速钢中M₂C碳化物分解转变行为的影响[J].特殊钢,2024,45(04):146-152. DOI： 10.20057/j.1003-8620.2024-00076.

Cao Yulong,Zhang Saikang,Wang Xiuxiu,et al.Effect of Heating Temperature on Decomposition Transition Behavior of M₂C Carbide in High-vanadium High-speed Steel[J].Special Steel,2024,45(04):146-152. DOI： 10.20057/j.1003-8620.2024-00076.

摘要

基于高耐磨性的需要，设计了一种W3Mo4Cr5V6高钒高速钢，利用SEM、EMPA等手段对该钢高温加热过程亚稳态M

C碳化物的分解转变行为进行了分析。结果表明，共晶碳化物M

C在高温加热过程会发生M

C+γ-Fe→M

C+MC+M

的转变，在富Mo、W的M

C相周围形成了大量富W、Mo的M

C及少量富V的MC和富Cr的M

。随着温度由950 ℃增至1 150 ℃，M

C高温转变逐渐趋于完全，且纤维状M

C比层片状M

C更易分解转变，最终，由呈断

续网状分布于奥氏体晶界的层片或纤维状形貌向零星分布于晶界的颗粒状形貌过渡，可有效减少网状碳化物对晶界的危害。研究可为高速钢中晶界碳化物成分、形态控制及其热加工、热处理过程温度与时间等参数选择提供有效参考。

Abstract

Based on the need of high wear resistance， a new kind of high-vanadium high-speed steel named W3Mo4Cr5V6 was designed. The transformation behavior of metastable M

C carbides in the high temperature heating process of the steel was analyzed by means of SEM and EMPA. The results show that the cophortic M

C carbide will undergo M

C+γ-Fe→M

C+MC+M

transition at high temperature heating process.A large number of W， Mo-rich M

C and a small amount of V-rich MC and Cr-rich M

are formed around the Mo and W-rich M

C phase. With the increase of temperature from 950 ℃ to 1 150 ℃， the high temperature transformation of M

C carbides gradually tends to be complete and the fibrous M

C is easier to decompose and transform than lamellar M

C， and the lamellar or fibrous morphology distributed in the austenite grain boundary with discontinuous network is transformed into the granular morphology distributed at the grain boundary， which can effectively reduce the harm of network carbides to the grain boundary. The research can provide an effective reference for the composition and morphology control of carbides distributed at the grain boundaries of high-speed steel and the optimal selection of parameters such as temperature and time of hot processing and heat treatment process.

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references

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School of Materials， University of Science and Technology Beijing

⁰

Effect of Heating Temperature on Decomposition Transition Behavior of M2C Carbide in High-vanadium High-speed Steel

DOI：10.20057/j.1003-8620.2024-00076

摘要

Abstract

关键词

Keywords

references

Effect of Heating Temperature on Decomposition Transition Behavior of M₂C Carbide in High-vanadium High-speed Steel