| XIAO Jin-rui,LIANG Zhong-wei,HUANG Jian-feng,GAO Wei-lin,LIU Xiao-chu,CHEN You-cheng.Effect of Strengthen Grinding on the Surface Corrosion Resistance of Bearing Ring[J],50(5):238-244, 294 |
| Effect of Strengthen Grinding on the Surface Corrosion Resistance of Bearing Ring |
| Received:June 01, 2020 Revised:July 31, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.05.026 |
| KeyWord:bearing ring strengthen grinding jet pressure corrosion resistance electrochemistry corrosion |
| Author | Institution |
| XIAO Jin-rui |
1. School of Mechanical & Electric Engineering,Guangzhou , China; 2. Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material,Guangzhou , China; 3. Guangdong Engineering and Technology Research Centre for Strengthen Grinding and High Performance Micro-nanomachining, Guangzhou University, Guangzhou , China |
| LIANG Zhong-wei |
1. School of Mechanical & Electric Engineering,Guangzhou , China; 2. Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material,Guangzhou , China; 3. Guangdong Engineering and Technology Research Centre for Strengthen Grinding and High Performance Micro-nanomachining, Guangzhou University, Guangzhou , China |
| HUANG Jian-feng |
1. School of Mechanical & Electric Engineering,Guangzhou , China; 2. Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material,Guangzhou , China; 3. Guangdong Engineering and Technology Research Centre for Strengthen Grinding and High Performance Micro-nanomachining, Guangzhou University, Guangzhou , China |
| GAO Wei-lin |
1. School of Mechanical & Electric Engineering,Guangzhou , China; 2. Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material,Guangzhou , China; 3. Guangdong Engineering and Technology Research Centre for Strengthen Grinding and High Performance Micro-nanomachining, Guangzhou University, Guangzhou , China |
| LIU Xiao-chu |
1. School of Mechanical & Electric Engineering,Guangzhou , China; 2. Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material,Guangzhou , China; 3. Guangdong Engineering and Technology Research Centre for Strengthen Grinding and High Performance Micro-nanomachining, Guangzhou University, Guangzhou , China |
| CHEN You-cheng |
1. School of Mechanical & Electric Engineering,Guangzhou , China; 2. Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material,Guangzhou , China; 3. Guangdong Engineering and Technology Research Centre for Strengthen Grinding and High Performance Micro-nanomachining, Guangzhou University, Guangzhou , China |
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| Abstract: |
| This work aims to explore the effect of strengthen grinding process on the surface corrosion resistance of bearing ring. A single variable method was used to change the jet pressure in the strengthen grinding process to prepare samples with different processing processes. The surface corrosion resistance of each sample in NaCl at room temperature was tested by electrochemical corrosion experiment, and the relevant data was recorded. The micro-structure, micro-hardness, grain size and lattice dislocation of samples that obtained by different processing methods were detected respectively by optical metallographic microscope, Vickers hardness tester and X-ray diffractometer. And the relationships between the micro-structure, the micro- hardness and the corrosion resistance of bearing ring samples were further analyzed. On the premise of keeping other processing parameters unchanged, the corrosion rates of the samples that obtained by strengthen grinding were respectively 13.40, 10.83 and 7.50 mm/a. And they were significantly lower than that of the sample without strengthen grinding treatment (18.24 mm/a). Moreover, with the increase of jet pressure, the uniformity of surface layer tissue, thickness of strengthened layer, dislocation density and microhardness increased, while the grain size decreased. Furthermore, with the jet pressure increased from 0.50 MPa to 0.70 MPa, the corrosion rate decreased by 50%, the thickness of the strengthened layer increased from 42 μm to 78 μm, the grain size decreased approximately linearly from 6.72 μm to 3.04 μm, while the dislocation density increased approximately linearly from 14.49×1014 m–2 to 71.09×1014 m–2. The curves of cross section’s micro-hardness with depth were in a staggered state, the micro-hardness of samples processed by 0.60 MPa was the highest, and the maximum hardened layer thickness was 110 μm at the distance of 30 μm and 90 to 110 μm from the machined surface. The strengthen grinding process is a technique that can enhance the surface corrosion resistance of bearing ring by obtaining dense reinforced surface with well-closed formation, high hardness, high dislocation density and small grain size. |
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