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奥氏体不锈钢表面包埋渗金属法制备Cr涂层的变形与退火行为

Deformation and Annealing Behavior of Cr Coating Prepared by Pack-Cementation on the Surface of Austenitic Stainless Steel.

作者信息

Xiao Tongwen, Zhang Jingting, Zhang Fujian, Su Huan, Hu Jianjun, Guo Ning

机构信息

School of Materials and Energy, Southwest University, Chongqing 400715, China.

College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China.

出版信息

Materials (Basel). 2024 Jul 20;17(14):3589. doi: 10.3390/ma17143589.

DOI:10.3390/ma17143589
PMID:39063881
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11278982/
Abstract

In this paper, a Cr coating was prepared by induction heating and pack-cementation chromizing on AISI 304 austenitic stainless steel. Then, the cold-rolling deformation and annealing treatment were introduced to refine the coarse matrix grains caused by pack-chromizing and improve the overall performance of 304 austenitic stainless steel. The phase composition, element distribution, and microstructure of the coating were carefully characterized. The microhardness, wear resistance, and corrosion resistance of the coating were tested. The results show that the Cr coating with a thickness of 100 μm is mainly composed of a (Cr,Fe)C, (Cr,Fe)C, and α-Fe-Cr solid solution. After the cold-rolling deformation and subsequent annealing treatment, the grains are significantly refined and the Cr coating is divided into two layers, consisting of carbon-chromium compounds such as CrC, CrC, CrC, and CrC in the surface layer and a Fe-Cr solid solution in the subsurface layer. The cold-rolling deformation and annealing treatment significantly improved the microhardness and wear resistance of the coated sample, and the corrosion resistance was also better than that of the uncoated sample.

摘要

本文通过感应加热和固体渗碳铬化工艺在AISI 304奥氏体不锈钢上制备了Cr涂层。然后，引入冷轧变形和退火处理，以细化渗铬处理导致的粗大基体晶粒，并提高304奥氏体不锈钢的综合性能。对涂层的相组成、元素分布和微观结构进行了细致表征。测试了涂层的显微硬度、耐磨性和耐腐蚀性。结果表明，厚度为100μm的Cr涂层主要由(Cr,Fe)C、(Cr,Fe)C和α-Fe-Cr固溶体组成。经过冷轧变形及随后的退火处理后，晶粒显著细化，Cr涂层分为两层，表层由CrC、CrC、CrC和CrC等碳铬化合物组成，次表层为Fe-Cr固溶体。冷轧变形和退火处理显著提高了涂层试样的显微硬度和耐磨性，其耐腐蚀性也优于未涂层试样。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1cc/11278982/959018a2cdf9/materials-17-03589-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1cc/11278982/959018a2cdf9/materials-17-03589-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1cc/11278982/45fb76412883/materials-17-03589-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1cc/11278982/f945eaa1d381/materials-17-03589-g003.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1cc/11278982/9f3f0ba3e740/materials-17-03589-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1cc/11278982/d8bb00d6dd63/materials-17-03589-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1cc/11278982/5cab9dc779be/materials-17-03589-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1cc/11278982/9cdcc2efe64e/materials-17-03589-g009.jpg
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