THE EFFECT OF RARE EARTH ON THE STRUCTURE AND PERFORMANCE OF LASER CLAD COATINGS

Ruiliang Bao, Huijun Yu, Chuanzhong Chen () and Qing Dong
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Ruiliang Bao: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Huijun Yu: Mechanical Engineering School, Shandong University, Shandong Ji'nan 250061, P. R. China
Chuanzhong Chen: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Qing Dong: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China

Surface Review and Letters (SRL), 2006, vol. 13, issue 04, 509-517

Abstract: Laser cladding is one kind of advanced surface modification technology and has the abroad prospect in making the wear-resistant coating on metal substrates. However, the application of laser cladding technology does not achieve the people's expectation in the practical production because of many defects such as cracks, pores and so on. The addiction of rare earth can effectively reduce the number of cracks in the clad coating and enhance the coating wear-resistance. In the paper, the effects of rare earth on metallurgical quality, microstructure, phase structure and wear-resistance are analyzed in turns. The preliminary discussion is also carried out on the effect mechanism of rare earth. At last, the development tendency of rare earth in the laser cladding has been briefly elaborated.

Keywords: Rare earth; laser cladding; microstructure; cracks; wear-resistance (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X0600875X

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