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| Repairing of 30CrMnSiNi2A High Strength Steel by Laser Cladding |
| Received:September 17, 2015 Revised:February 15, 2016 |
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| DOI：10.7643/issn.1672-9242.2016.01.012 |
| KeyWord:30CrMnSiNi2A laser cladding repairing |
| Author | Institution |
| ZHANG Zhi-qiang |
No. 5720 Factory of PLA，Anhui ，China |
| CHENG Zong-hui |
No. 5720 Factory of PLA，Anhui ，China |
| CAO Qiang |
No. 5720 Factory of PLA，Anhui ，China |
| ZHOU Ke-xin |
No. 5720 Factory of PLA，Anhui ，China |
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| Abstract: |
| Objective To investigate laser cladding technology so as to repair the defects such as surface corrosion, scratch and crack on 30CrMnSiNi2A high strength steel. Methods In this paper, an experiment of laser cladding on 30CrMnSiNi2A substrate was carried out by using fiber laser with near substrate powder, the processing parameters were optimized. The microstructure, hardness and mechanic performance of cladding layer were tested, and morphology of the fracture in the tensile test was analyzed. Results It was found that the cladding layer was well combined with substrate in metallurgy, the heat affected zone was small, the average tensile strength of cladding layer was higher than 80% of the tensile strength of substrate, while the brittleness of cladding layer was increased a little than that of substrate. Conclusion Laser cladding can be used to repair the defects such as surface corrosion, scratch and crack on 30CrMnSiNi2A high strength steel. |
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