Microstructure and properties of high chrome steel roller after laser surface melting

被引：38
|
作者：
Li, Meiyan [1 ]
Wang, Yong [1 ]
Han, Bin [1 ]
Zhao, Weimin [1 ]
Han, Tao [1 ]
机构：
[1] China Univ Petr, Coll Electromech Engn, Dongying 257061, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2009年 / 255卷 / 17期
关键词：
Laser surface melting; High chrome steel; Microstructure; Microhardness; Corrosion behavior; HIGH-SPEED STEEL; MARTENSITIC STAINLESS-STEEL; ABRASIVE WEAR BEHAVIOR; MELTED TOOL STEEL; PULSED ION-BEAM; CORROSION BEHAVIOR; RETAINED AUSTENITE; CAVITATION EROSION; RESISTANCE; COATINGS;
D O I：
10.1016/j.apsusc.2009.04.030
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Laser surface melting of high chrome steels was achieved by a 5 kW continuous wave CO2 laser. The microstructure of the laser surface-melted steels was investigated by scanning electron microscopy, transmission electron microscopy and X-ray diffractometry, and the hardness profiles were determined by a Vickers hardness tester. The corrosion behavior in 3.5% NaCl solution was studied by electrochemical corrosion equipment. The large carbides of high chrome steels are completely dissolved and ultra. ne dendrites of austenite with submicroscopic M23C6 carbides precipitation are formed in the melted zone. The austenite in the melted zone has a high tempering stability. The corrosion resistance of the laser surface-melted steels is significantly improved due to the dissolution of carbides and the increase of the alloying elements in the solid solution as well as the large amount of austenite. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：7574 / 7579
页数：6
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