310S耐热不锈钢高温长期时效过程中的组织演变

doi:10.13251/j.issn.0254-6051.2021.07.011

金属热处理 ›› 2021, Vol. 46 ›› Issue (7): 56-59.DOI: 10.13251/j.issn.0254-6051.2021.07.011

310S耐热不锈钢高温长期时效过程中的组织演变

苗华军, 李国平

太原钢铁集团有限公司先进不锈钢材料国家重点实验室, 山西太原 030003

收稿日期:2020-12-25 出版日期:2021-07-25 发布日期:2021-12-10
作者简介:苗华军(1977—),男,高级工程师,硕士,主要研究方向为不锈钢材料的研发及科技管理,E-mail:miaohj@tisco.com.cn。

Microstructure evolution of 310S heat-resistant stainless steel during long term aging at high temperature

Miao Huajun, Li Guoping

State Key Laboratory of Advanced Stainless Steel Materials, Taiyuan Iron & SteelGroup Co., Ltd., Taiyuan Shanxi 030003, China

Received:2020-12-25 Online:2021-07-25 Published:2021-12-10

摘要/Abstract

摘要： 采用光学显微镜、扫描电镜及X射线能谱、显微硬度计和X射线衍射仪研究了310S耐热不锈钢在950 ℃下50~3000 h长时间时效后的显微组织。结果表明,时效后主要析出了碳化物Cr₂₃C₆和σ相两种析出相,时效过程中碳化物Cr₂₃C₆先于σ相析出;随时效时间的延长,碳化物数量先增加然后减少,σ相含量一直在增加。

关键词: 耐热不锈钢, 时效, 析出相

Abstract: Microstructure evolution of the 310S heat-resistant stainless steel after aging at 950 ℃ for 50-3000 h was investigated by optical microscope (OM), scanning electron microscope (SEM) and energy dispersive X-ray spectrometer(EDS),microhardness tester as well as X-ray diffraction instrument (XRD).The experimental results indicate that the major precipitates are Cr₂₃C₆ and σ phase after aging. When the aging time is 50 h, the carbide Cr₂₃C₆ precipitates before the σ phase. During aging, the number of Cr₂₃C₆ increases at first and then decreases, while the content of σ phase increases all the time.

Key words: heat-resistant stainless steel, aging treatment, precipitated phase

中图分类号:

TG113.1

苗华军, 李国平. 310S耐热不锈钢高温长期时效过程中的组织演变[J]. 金属热处理, 2021, 46(7): 56-59.

Miao Huajun, Li Guoping. Microstructure evolution of 310S heat-resistant stainless steel during long term aging at high temperature[J]. Heat Treatment of Metals, 2021, 46(7): 56-59.

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310S耐热不锈钢高温长期时效过程中的组织演变

Microstructure evolution of 310S heat-resistant stainless steel during long term aging at high temperature

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