Co添加对新型海工焊材中碳化物析出的影响

doi:10.13251/j.issn.0254-6051.2025.11.012

金属热处理 ›› 2025, Vol. 50 ›› Issue (11): 76-81.DOI: 10.13251/j.issn.0254-6051.2025.11.012

Co添加对新型海工焊材中碳化物析出的影响

贺帅^1,2, 金耀辉², 李志峰³, 王超逸², 刘鑫², 王军生²

1.钢研华普科技有限公司, 北京 100081;
2.海洋装备用金属材料及其应用国家重点实验室, 辽宁鞍山 114009;
3.中国钢研科技集团有限公司, 北京 100081

收稿日期:2025-06-07 修回日期:2025-09-15 发布日期:2025-12-16
通讯作者: 李志峰,高级工程师,博士,E-mail:lizhifengimust@163.com
作者简介:贺帅(1991—),女,研究员,博士,主要研究方向为高强钢组织性能调控,E-mail:neuheshuai2016@126.com。
基金资助:
国家自然科学基金(52004063)

Effect of Co addition on carbide precipitation in novel marine engineering welding material

He Shuai^{1, 2}, Jin Yaohui², Li Zhifeng³, Wang Chaoyi², Liu Xin², Wang Junsheng²

1. CISRI Hydrogen &Porous Technology Co., Ltd., Beijing 100081, China;
2. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan Liaoning 114009, China;
3. China Iron &Steel Research Institute Group Co., Ltd., Beijing 100081, China

Received:2025-06-07 Revised:2025-09-15 Published:2025-12-16

摘要/Abstract

摘要： 利用热动力学计算软件Thermo-Calc和TC-Prisma,系统分析了新型海工焊材中添加6%Co对不同类型碳化物析出的影响。结果表明,6%Co的添加显著提高了FCC向BCC的相转变温度,增加了MC型和HCP结构碳化物的析出温度,同时降低了富Cu相的析出温度和析出量。6%Co显著促进了M₆C、HCP以及MC碳化物析出的形核速率,对HCP和M₆C的影响更为突出。6%Co的添加增加了M₆C和HCP碳化物的析出数密度,但显著抑制了MC碳化物的析出数量。通过改变碳原子扩散系数,6%Co的添加限制了碳化物的生长速度,导致3种析出碳化物尺寸均减小。Co的添加对3种碳化物析出体积分数的影响则存在很大差异,HCP碳化物析出体积分数先基本无影响后降低,M₆C体积分数增至稳定水平(2.2%),而MC碳化物体积分数则显著降低。

关键词: Co元素, 碳化物, Thermo-Calc, 海工焊材

Abstract: Effect of adding 6%Co to a novel marine welding material on the precipitation of different types of carbides was systematically analyzed by using the thermodynamics calculation software Thermo-Calc and TC-Prisma. The results show that the addition of 6%Co significantly increases the phase transformation temperature from FCC to BCC, elevates the precipitation temperatures of MC-type and HCP-type carbides, while reducing the precipitation temperature and precipitation amount of Cu-rich precipitates. Specifically, 6%Co remarkably promotes the nucleation rate of M₆C, HCP, and MC carbides, with a more prominent effect on HCP and M₆C carbides. The addition of 6%Co increases the precipitation number density of M₆C and HCP carbides, but significantly inhibits the precipitation quantity of MC carbides. By altering the diffusion coefficient of carbon atoms, the addition of 6%Co restricts the growth rate of carbides, resulting in a reduction in the size of three types of precipitated carbides. The effect of Co addition on the precipitation volume fraction of three types of carbides varies significantly. The precipitation volume fraction of HCP carbides firstly has little effect and then decreases, while the volume fraction of M₆C increases to a stable level (2.2%), and the volume fraction of MC carbides significantly decreases.

Key words: Co element, carbide, Thermo-Calc, marine engineering welding material

中图分类号:

TG142

贺帅, 金耀辉, 李志峰, 王超逸, 刘鑫, 王军生. Co添加对新型海工焊材中碳化物析出的影响[J]. 金属热处理, 2025, 50(11): 76-81.

He Shuai, Jin Yaohui, Li Zhifeng, Wang Chaoyi, Liu Xin, Wang Junsheng. Effect of Co addition on carbide precipitation in novel marine engineering welding material[J]. Heat Treatment of Metals, 2025, 50(11): 76-81.

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Co添加对新型海工焊材中碳化物析出的影响

Effect of Co addition on carbide precipitation in novel marine engineering welding material

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