| FENG Xu-dong,YUAN Qing-long,CAO Jing-jing,SU Zhi-jun.Research on the Microstructure and Properties of Laser Cladding Layer and Thermal Spray Coating on the Surface of Soft Steel[J],39(2):19-20,27 |
| Research on the Microstructure and Properties of Laser Cladding Layer and Thermal Spray Coating on the Surface of Soft Steel |
| Received:November 10, 2009 Revised:April 10, 2010 |
| View Full Text View/Add Comment Download reader |
| DOI： |
| KeyWord:Laser cladding Thermal spray Microstructure |
| Author | Institution |
| FENG Xu-dong |
Henan Polytechnic University, Jiaozuo , China |
| YUAN Qing-long |
Henan Polytechnic University, Jiaozuo , China |
| CAO Jing-jing |
Henan Polytechnic University, Jiaozuo , China |
| SU Zhi-jun |
Henan Polytechnic University, Jiaozuo , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Ni25 alloy coatings have been prepared by a CO2laser on the soft steel(Q235)surface. Cross-section microstructure characteristics of the coating were studied by scanning electronic microscope and micro-hardness analysis. The results show that laser cladding layers, which have no defects of cracks and holes, contain a large number of dendrites. That is metallurgical bonding between the cladding layer and the substrate, which makes high bonding strength. But thermal spray coatings exist obvious holes and gaps. The combination is mechanical binding between the coating and the matrix. There is weak binding force. The average micro-hardness of laser cladding layer is higher than that of thermal spray coating, and the hardness of two coatings is much higher than that of the substrate. |
| Close |
|
|
|