| QUE Ming-xin,BAI Xing-wang,ZHOU Xiang-man,ZHANG Hai-ou.Effect of Surface Texturing on the Interfacial Microstructure and Bonding Strength of Babbitt Alloy Cladding by MIG Welding[J],50(10):239-245 |
| Effect of Surface Texturing on the Interfacial Microstructure and Bonding Strength of Babbitt Alloy Cladding by MIG Welding |
| Received:June 29, 2021 Revised:September 09, 2021 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.10.023 |
| KeyWord:surface texturing Babbitt alloy Welding interfacial microstructure bonding strength |
| Author | Institution |
| QUE Ming-xin |
School of Mechanical Engineering,Hengyang , China ;Hunan Collaborative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China, Hengyang , China |
| BAI Xing-wang |
School of Mechanical Engineering,Hengyang , China |
| ZHOU Xiang-man |
School of Mechanical and Power Engineering, China Three Gorges University, Yichang , China |
| ZHANG Hai-ou |
School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan , China |
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| Abstract: |
| To study the effect of surface texturing on the interface microstructure and bonding strength, the SnSb11Cu6 alloy cladding was prepared by MIG welding on the Q235 steel substrates which were pre-textured. The texturing morphology of straight grooves and grids with the depths of 0.1 mm and 0.3 mm, the spacings of 1 mm and 1.5 mm were used. The composition of the Babbitt alloy cladding layer was analyzed through XRD. Metallurgical microscope, SEM and EDS were applied to characterize the interfacial microstructure, microscopic morphology and element distribution of the interface. The bonding strength and the wetting angle were tested by using universal testing machines and stereo microscope respectively. Although the texturing treatment reduces the wettability of the Babbitt alloy with the steel matrix, it increases the contact area between the Babbitt alloy and the steel substrate; the texturing grooves are filled with parts of Babbitt alloy, which causes the mechanical interlocking effect between the substrate and the alloy layer; the material at the edge of the texturing contour is easy to melt, which would promote the interface reaction. Under the combined effect of the above factors, the bonding strength between the Babbitt alloy and the steel substrate was increased from 39.67 MPa for the untextured sample to 51.14 MPa for the textured sample. Grids texturing samples can obtain a larger contact area than straight groove texturing samples, but it enhances the pinning effect of the texture peak on the three-phase line displacement, and the wettability of the grids texturing sample is worse. So, the bonding strength of the texturing samples with different texturing parameters is similar. The bonding strength of the texturing samples with different texturing parameters is similar. Grids texturing samples can obtain a larger contact area than straight groove texturing samples, but the wettability of the grids texturing sample is worse. The texturing treatment effectively improves the bonding strength between the Babbitt alloy and the steel matrix due to the combined effect of the contact area increase, the intermetallic compounds formation, and mechanical interlocking effect. |
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