| YE Si-you,LIU Jian-yong,YANG Wei.Quality of H13 Alloy Coating on H13 Steel Prepared by Laser Cladding[J],44(8):81-85,125 |
| Quality of H13 Alloy Coating on H13 Steel Prepared by Laser Cladding |
| Received:April 08, 2015 Revised:August 20, 2015 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.08.015 |
| KeyWord:laser cladding H13 alloy coating geometrical feature uniform design regression model microhardness |
| Author | Institution |
| YE Si-you |
Department of Materials Science and Engineering, Hubei Automotive Industrial Institute, Shiyan , China |
| LIU Jian-yong |
1. Department of Materials Science and Engineering, Hubei Automotive Industrial Institute, Shiyan , China;2. Department of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an , China |
| YANG Wei |
Department of Materials Science and Engineering, Hubei Automotive Industrial Institute, Shiyan , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To investigate the technology for preparing high-quality H13 alloy laser cladding layers. Methods Laser cladding of H13 alloy powder was undertaken on the surface of annealed H13 steel. A uniform design test was conducted and metallographical method was used to detect the geometric parameters of the cladding layers. The width regression model was obtained by regression analysis, and the accuracy of the model was verified. The microstrcucture and elementary composition of the cladding layers were investigated by OM and SEM. The microhardness distribution of the cladding layers was tested by micro-hardness tester. Holes,cracks and composition segregation of the cladding layer were analyzed. Results The results indicated that using a scanning speed of 22 millimeter per second, a laser power of 1300 W, and a powder feeding rate of 21 grams per minute, the metallurgical combination was implemented between cladding layers and substrates. The uniform and compact microstructure was showed without cracks. The microhardness of the cladding layer reached up to 600 ~699HV, which was 2. 4 to 3 times higher than that of the H13 steel substrate. At a scanning speed of 14 millimeter per second, a laser power of 1400 W, and a powder feeding rate of 42 grams per minute, the microhardness was 669 ~ 698HV, which was 2. 85 to 3 times higher than that of the substrate. Conclusion H13 alloy coating with relatively high quality could be obtained under both technological conditions. |
| Close |
|
|
|