| ZHAO Long-zhi,DENG Chu-xiang,WANG Zhen,ZHAO Ming-juan,LIU De-jia,TANG Yan-chuan,JIAO Hai-tao,LI Jin.Effect of Ti Content on Tribology Properties of Fe-Ni-Ti Laser Cladding[J],49(10):39-44 |
| Effect of Ti Content on Tribology Properties of Fe-Ni-Ti Laser Cladding |
| Received:August 15, 2020 Revised:October 20, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.10.004 |
| KeyWord:laser cladding invar effect Ti content in-situ generation tribology properties |
| Author | Institution |
| ZHAO Long-zhi |
1.a.School of Materials Science and Engineering, b.Key Laboratory of Advanced Materials for Vehicles & Laser Additive Manufacturing of Nanchang City, East China Jiaotong University, Nanchang , China |
| DENG Chu-xiang |
1.a.School of Materials Science and Engineering, b.Key Laboratory of Advanced Materials for Vehicles & Laser Additive Manufacturing of Nanchang City, East China Jiaotong University, Nanchang , China |
| WANG Zhen |
1.a.School of Materials Science and Engineering, b.Key Laboratory of Advanced Materials for Vehicles & Laser Additive Manufacturing of Nanchang City, East China Jiaotong University, Nanchang , China |
| ZHAO Ming-juan |
1.a.School of Materials Science and Engineering, b.Key Laboratory of Advanced Materials for Vehicles & Laser Additive Manufacturing of Nanchang City, East China Jiaotong University, Nanchang , China |
| LIU De-jia |
1.a.School of Materials Science and Engineering, b.Key Laboratory of Advanced Materials for Vehicles & Laser Additive Manufacturing of Nanchang City, East China Jiaotong University, Nanchang , China |
| TANG Yan-chuan |
1.a.School of Materials Science and Engineering, b.Key Laboratory of Advanced Materials for Vehicles & Laser Additive Manufacturing of Nanchang City, East China Jiaotong University, Nanchang , China |
| JIAO Hai-tao |
1.a.School of Materials Science and Engineering, b.Key Laboratory of Advanced Materials for Vehicles & Laser Additive Manufacturing of Nanchang City, East China Jiaotong University, Nanchang , China |
| LI Jin |
2.Tongda Industry and Trade Co., Ltd, Nanchang Railway Administration, Nanchang , China |
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| Abstract: |
| The work aims to study the effect of Ti content on in-situ reinforcement of invar alloy-based laser cladding. Fe-Ni-Ti laser cladding was fabricated by diode laser equipment, and the effect of Ti content on the laser cladding was investigated. The microstructure of the laser cladding was characterized with the optical microscopy (OP), scanning electron microscopy (SEM) and X-ray diffractometer. The microhardness and wear resistance were analyzed by the microhardness tester and the M-2000 abrasion testing machine. TiC/Fe-Ni laser cladding layer was formed in situ by adding Ti element into Fe-Ni invar alloy powder and in-situ TiC could obviously refine the matrix grains of cladding layer. With the increase of Ti content, the grain size of the composite cladding decreased and then remained stable. When the Ti content was low, the main matrix phase in cladding was γ-[Fe,Ni]. When the content of Ti was up to 8%, the cladding matrix phase γ was changed into α phase, which indicated that the invar effect in Fe-Ni alloy disappeared and cracks and pores were observed. When the content of Ti was 6%, there was no crack in the cladding and the microhardness and wear resistance of the cladding had peak value. In-situ strengthening can be achieved by adding titanium to invar alloy cladding, and the amount of titanium added has the best value. Excessive addition of titanium will eliminate the unique invar effect of Fe-Ni alloy laser cladding, and the wear mechanism of cladding layer is mainly adhesive wear and abrasive wear. |
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