The phenomenon of grinding Inconel-718,SKD-11 and S15C under cryogenic,wet and dry environment .

• Main Authors: Lo, Wei-Lung, 羅偉倫
• Other Authors: 廖運炫
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/13293482311212981066

碩士 === 國立臺灣大學 === 機械工程學研究所 === 87 === Abstract Inconel-718 alloy is well known as one of a difficult-to-cut material. Grinding experiments by aluminum oxide wheel are conducted, and S15C, SKD-11 and Inconel-718 are grinded at different cutting depth and different cutting fluids(liquid nitrogen, water and no cutting fluid). Grinding force and grinding temperature are measured, and the topography of the grinding wheels are photographed. It is found that the loading of the wheels can be classified into three types. Chips of the first type are long and slender, and the chips do not adhere to abrasives. Effective cutting edges of the abrasives are not affected by the chips in the first type loading. Chips of the second type are small compare to the abrasives, adhering to the abrasive in the void between abrasives, and do not affect the effective cutting edges function. Chips of the third type adhering to the effective cutting edges render the edges ineffectiveness. The force rise with grinding passes when grinding Inconel-718 and SKD-11, descend with grinding pass when grinding S15C. The order of grinding force when using different cutting fluid varies in different cutting depth. It is because the phenomenon of cyclic fall out of the chips. It seems that materials prone to work-hardening is not suitable for cryogenic grinding.