| URN | etd-0713122-143129 | Statistics | This thesis had been viewed 62 times. Download 1 times. |
| Author | Li-kai Kuo | ||
| Author's Email Address | No Public. | ||
| Department | Institute Of Mechanical Engineering | ||
| Year | 2021 | Semester | 2 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 76 |
| Title | Study on Grinding SCM440 Chromium Molybdenum Steel with Al2O3 and SiC abrasive | ||
| Keyword | |||
| Abstract | This dissertation is about the investigation of surface defect and surface roughness of SCM440 chrome molybdenum steel after machining based on high precision planar machinery polishing by setting the different parameters. During experimental process, Al2O3 and SiC powder were used as abrasives respectively. The test applied Taguchi methods to the grinding and polishing at the finds the best consistent parameter combination for fabrication. The abrasive particle size, the concentration of the polishing solution, the pressure load applied to the test piece, the rotational speed of the grinding disc and the grinding time were used as parameters. Analyses were performed in conjunction with appropriate orthogonal arrays to speed up and simplify the experimental process. Based on Larger-The-Better, Signal-to-Noise ratio (SN ratio) data to analyze, observe the polishing effect on the surface of SCM440 chrome molybdenum steel under different parameters. Based on the time-based experimental result, with Al2O3 of particle diameter of 1µm, the slurry concentration of 15%, the axial load of 6 kg, the grinding disc rotational speed of 60rpm, the original surface roughness of SCM440 Chrome molybdenum steel can be reduced from 0.85µm to 0.01µm in a very short time with an removal rate of 98.82%. In the end, the surface of the samples was observed by 3D surface roughness profiler and SEM, this experiment proves that polishing with the optimal condition parameter setting can effectively remove the rough traces on the surface of the specimen in a short time, and confirmed that the use of Al2O3 alumina compared with SiC silicon carbide achieves a smooth finish faster. |
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| Advisor Committee | |||
| Files | indicate access worldwide | ||
| Date of Defense | 2022-07-04 | Date of Submission | 2022-07-13 |