Influence of the base preheating on cracking of the laser-cladded coatings

被引：9

作者：

Jendrzejewski, R ^{[1
]}

Sliwinski, G ^{[1
]}

Conde, A ^{[1
]}

de Damborenea, JJ ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Fluid Flow Machinery, PL-80952 Gdansk, Poland

来源：

LASER PROCESSING OF ADVANCED MATERIALS AND LASER MICROTECHNOLOGIES | 2003年 / 5121卷

关键词：

laser cladding; stellite powders; protective coatings;

D O I：

10.1117/12.515624

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Coatings of stellite SF6 are prepared on the chromium steel base by means of a direct laser cladding. A 1.2 kW CO2 laser is applied and the original material is delivered into the processing zone coaxially with the laser beam. The samples are produced with and without a controlled preheating of the substrate and are investigated by means of metallographic techniques. It is found that the observed micro-cracking susceptibility decreases markedly with increase of the base preheating temperature up to 750 K and the crack-free coatings are produced for preheating around 950 K. The substrate-coating interface reveals a metallic bond and the microstructure is characterized by a fine-grained, dendritic structure. The nearly constant concentration dependence of Fe, Co, Cr and Ni on the distance from interface indicates on homogeneous chemical composition of the produced coatings.

引用

页码：356 / 361

页数：6

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