P92钢渗铝工艺的优化

doi:10.13251/j.issn.0254-6051.2025.04.040

金属热处理 ›› 2025, Vol. 50 ›› Issue (4): 259-263.DOI: 10.13251/j.issn.0254-6051.2025.04.040

P92钢渗铝工艺的优化

赵勇桃, 王瑞, 王玉峰, 任慧平

内蒙古科技大学材料科学与工程学院, 内蒙古包头 014010

收稿日期:2024-10-28 修回日期:2025-01-16 发布日期:2025-06-13
作者简介:赵勇桃(1977—),女,教授,博士,主要研究方向为金属材料的组织转变及热加工工艺,E-mail: zyt0011@126.com
基金资助:
重大横向课题(0404051907)

Optimization of aluminizing process for P92 steel

Zhao Yongtao, Wang Rui, Wang Yufeng, Ren Huiping

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

Received:2024-10-28 Revised:2025-01-16 Published:2025-06-13

摘要/Abstract

摘要： 通过在渗铝剂中加入一定量的稀土(SmCl₃),采用低温粉末包埋渗铝法,在不同温度和时间条件下对P92钢进行渗铝。通过OM、SEM对渗铝层形貌进行观察,通过EDS和XRD分别对渗层截面元素分布和物相结构进行分析,利用显微硬度计测定渗铝层的表面显微硬度。结果表明,550 ℃渗铝6、8、10 h后P92钢表面未发现渗铝层,750 ℃渗铝10 h时渗铝层存在疏松多孔等缺陷,650 ℃渗铝层质量较好,未发现缩孔裂纹等缺陷。P92钢在650 ℃渗铝6、8、10 h对应的渗铝层平均厚度分别为27、30、31 μm。渗铝层的硬度比P92钢的基体硬度高260 HV0.025左右。P92钢在650 ℃渗铝后表层物相为AlFe₃、AlCrFe₂相,在750 ℃渗铝后表层物相为AlFe。

关键词: P92钢, 稀土SmCl₃, 渗铝工艺

Abstract: Through adding a certain amount of rare earth SmCl₃ to the aluminium infiltrant and using low temperature powder-embedded aluminizing method, the P92 steel was aluminized at different temperatures and time. The morphology of the aluminized layer was observed by using OM and SEM, the element distribution in cross-section and phase structure of the aluminized layer were analyzed by means of EDS and XRD, respectively, and the microhardness of the aluminized layer was measured by microhardness tester. The results show that after aluminizing at 550 ℃ for 6, 8, 10 h, respectively, no aluminizing layer is found on the surface of the P92 steel. After aluminizing at 750 ℃ for 10 h, the aluminized layer has defects like being loose and porous, whereas the quality of the aluminized layer is better at 650 ℃, with no shrinking pore cracks or other defects. After aluminizing at 650 ℃ for 6, 8, 10 h, respectively, the average thicknesses of the aluminizing layers are 27, 30, 31 μm, respectively. The hardness of the aluminized layer is approximately 260 HV0.025 higher than the average hardness of the P92 steel substrate. After aluminizing at 650 ℃, the surface phase of the P92 steel is AlFe₃ and AlCrFe₂, and after aluminizing at 750 ℃, it is AlFe.

Key words: P92 steel, rare earth SmCl₃, aluminizing process

中图分类号:

TG156.4

赵勇桃, 王瑞, 王玉峰, 任慧平. P92钢渗铝工艺的优化[J]. 金属热处理, 2025, 50(4): 259-263.

Zhao Yongtao, Wang Rui, Wang Yufeng, Ren Huiping. Optimization of aluminizing process for P92 steel[J]. Heat Treatment of Metals, 2025, 50(4): 259-263.

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P92钢渗铝工艺的优化

Optimization of aluminizing process for P92 steel

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