稀土元素Ce对H13钢热疲劳性能的影响

doi:10.13251/j.issn.0254-6051.2023.11.010

金属热处理 ›› 2023, Vol. 48 ›› Issue (11): 62-67.DOI: 10.13251/j.issn.0254-6051.2023.11.010

稀土元素Ce对H13钢热疲劳性能的影响

陈学敏, 杨礼林, 徐祺昊, 陈朔, 赵莉萍

内蒙古科技大学材料与冶金学院, 内蒙古包头 014010

收稿日期:2023-06-26 修回日期:2023-09-18 出版日期:2023-11-25 发布日期:2023-12-27
通讯作者: 赵莉萍,教授,硕士,E-mail:zhaoliping5195@126.com
作者简介:陈学敏(1995—),男,硕士研究生,主要研究方向为金属材料的组织及质量控制,E-mail:chen_xm1995@163.com。
基金资助:
内蒙古自治区科技创新引导奖励资金( 0902062001);内蒙古科技大学创新基金( 2019QDL-B05)

Effect of rare earth element Ce on thermal fatigue properties of H13 steel

Chen Xuemin, Yang Lilin, Xu Qihao, Chen Shuo, Zhao Liping

School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China

Received:2023-06-26 Revised:2023-09-18 Online:2023-11-25 Published:2023-12-27

摘要/Abstract

摘要： 对不同Ce含量的H13钢进行1040 ℃油淬和580 ℃两次回火处理后进行热疲劳循环试验,采用光学显微镜、扫描电镜及硬度计对不同热疲劳循环次数下试验钢的显微组织、裂纹形貌及硬度进行分析。结果表明,试验钢热疲劳循环后显微组织为回火索氏体,热疲劳裂纹优先在预先处理的缺口尖端处萌生,热疲劳循环过程中出现的氧化凹坑和夹杂物会促使裂纹生成,裂纹不断扩展,宽度增加。稀土Ce对试验钢组织和晶粒尺寸有明显的细化作用,提升试验钢的抗软化能力,抑制热疲劳裂纹的生长,其中最佳稀土Ce含量为0.026%。

关键词: H13钢, 稀土Ce, 热疲劳, 裂纹, 软化

Abstract: Thermal fatigue cycling tests were conducted on H13 steel with different Ce contents after oil quenching at 1040 ℃ and tempering twice at 580 ℃. The microstructure, crack morphology, and hardness of the tested steel under different thermal fatigue cycles were analyzed by means of optical microscope, scanning electron microscope, and hardness tester. The results indicate that after thermal fatigue cycle, the microstructure of the tested steel is tempered sorbite. Thermal fatigue cracks first initiate at the tip of the pre-treated notch, and the oxidation pits and inclusions that occur during the thermal fatigue cycle promote crack generation. The cracks continue to extend and increase in width. Rare earth Ce has a significant refining effect on the microstructure and grain size of the tested steel, improving the resistance to softening, inhibiting the growth of thermal fatigue cracks, and the optimal rare earth Ce content is 0.026%.

Key words: H13 steel, rare earth Ce, thermal fatigue, crack, softening

中图分类号:

TG142.1

陈学敏, 杨礼林, 徐祺昊, 陈朔, 赵莉萍. 稀土元素Ce对H13钢热疲劳性能的影响[J]. 金属热处理, 2023, 48(11): 62-67.

Chen Xuemin, Yang Lilin, Xu Qihao, Chen Shuo, Zhao Liping. Effect of rare earth element Ce on thermal fatigue properties of H13 steel[J]. Heat Treatment of Metals, 2023, 48(11): 62-67.

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稀土元素Ce对H13钢热疲劳性能的影响

Effect of rare earth element Ce on thermal fatigue properties of H13 steel

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