Laser Surface Alloying of Cr-CrB2 onto a SUS 304 Stainless Steel Substrate

被引：1

作者：

Zhang, M-K. ^{[1
]}

Sun, G-F. ^{[1
]}

Zhang, Y-K. ^{[2
]}

Liu, C-S. ^{[3
]}

Ren, X-D ^{[1
]}

Feng, A-X. ^{[1
]}

Zhang, W. ^{[4
]}

机构：

[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Peoples R China

[2] Southeastern Univ, Sch Mech Engn, Nanjing 211189, Jiangsu, Peoples R China

[3] Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110004, Peoples R China

[4] Jiangsu Lianguan Sci & Technol Dev Co Ltd, Zhangjiagang 215624, Peoples R China

来源：

LASERS IN ENGINEERING | 2014年 / 27卷 / 3-4期

基金：

中国国家自然科学基金; 美国国家科学基金会; 中国博士后科学基金;

关键词：

CO2; laser; laser surface alloying; Cr-CrB2; stainless steel; microstructure; microhardness; wear resistance; WEAR-RESISTANCE ENHANCEMENT; S31603; STAINLESS-STEEL; AISI; 304-STAINLESS-STEEL; CAST-IRON; CORROSION; MICROSTRUCTURE; COATINGS; BEHAVIOR; ROLLS; FE;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SUS 304 stainless steel was laser surface alloyed with Cr-20 wt% CrB2 powders. Phases. microhardness distribution, microstructure, and wear behaviour of the alloyed layers were investigated. Results indicate that the alloyed layers were composed of austenite, martensite, chromium carbides, chromium borides and iron borides, improving the microhardness from 220 HV0.1 of the substrate to 1400 HV0.1 of the alloyed layer. The microstructure of the laser alloyed layer consists of planar growth dendrite at the interface, followed by columnar dendrite, and dendrites and eutectics at the core and top surface. Wear results indicate that the relative wear resistance of the alloyed layer was 18.76 times of that of the untreated stainless steel. The improvement in wear resistance was attributed to the combined results of the high hardness, the grain refining effect, the solution strengthening effect, and the distribution of the hard Cr23C6, Cr3C2, Cr2B and martensite phases.

引用

页码：231 / 245

页数：15

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