Microstructural characteristics, hardness and wear resistance of a typical ferritic/martensitic steel surface-treated by pulsed laser

被引：21
|
作者：
Yuan, Qian [1 ]
Chai, Linjiang [1 ]
Shen, Jing [1 ]
Wang, Hao [2 ]
Guan, Haotian [1 ]
Guo, Ning [3 ]
Li, Yuqiong [4 ]
机构：
[1] Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China
[2] Nucl Power Inst China, Sci & Technol Reactor Fuel & Mat Lab, Chengdu 610041, Sichuan, Peoples R China
[3] Southwest Univ, Fac Mat & Energy, Chongqing 400715, Peoples R China
[4] Guangxi Univ, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Nanning 530004, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2021年 / 418卷
关键词：
Ferritic/martensitic sheet; Laser surface treatment; Hardness; Wear resistance; LATH MARTENSITE; MECHANICAL-PROPERTIES; CRYSTALLOGRAPHY; MORPHOLOGY; COATINGS; LBE;
D O I：
10.1016/j.surfcoat.2021.127261
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A typical ferritic/martensitic (F/M) sheet was subjected to laser surface treatment (LST) with microstructural characteristics, hardness and wear resistance before and after the LST well revealed by jointly utilizing multiple characterization methods. Two distinct modification zones exist in the LSTed specimen: (i) melted zone consisting of both martensitic plates and bulk delta ferrite and (ii) heat-affected zone mainly composed of martensitic plates, with respective hardnesses of 385 +/- 17 HV and 442 +/- 44 HV, markedly higher than that of the substrate (267 +/- 3 HV). Wear rate measurements suggest that wear resistance of the LSTed F/M steel is improved by >50%. The improved surface properties are well correlated with specific microstructural characteristics induced by the LST.
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页数：10
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