Laser surface alloying of NiCr-Cr3C2 and C-B-W-Cr powders on nodular cast iron rolls
The laser surface alloying(LSA) technique was firstly used to form wear resistant layers on nodular cast iron rolls with two different powders, A: NiCr-Cr3C2 and B: C-B-W-Cr. The microstructure, element distribution and phases of the layers were investigated. Results indicate that the alloying layers had pores and cracks, as well as a metallurgical bonding with the substrates. For layers with powder A, as the thickness of the pre-layers decreased, the numbers of pores and cracks of the LSA layers decreased but the thicknesses of them were close. Phases were barely influenced by the thickness of the pre-layer, while the content of them were affected. For layers with powder B, as the laser specific energy increased, the numbers of pores and cracks in the LSA layers decreased and the thicknesses of them increased. The microstructure in the layers with different powders was different.
laser surface alloying nodular cast iron roll carbide phase
Guifang Sun Changsheng Liu Jing Liang Junhua Zhou Xingqi Tao
Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education, Northeastern Univer Shenyang Dalu Laser Whole Set Equipment Limited Company, Shenyang 110136, China
国际会议
青岛
英文
1459-1462
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）