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碩士 === 國立中央大學 === 機械工程學系 === 103 === In the study，three types of die steels(M333，SKD61，M390) were prepared via austenitiling treatment quenched to room temperature the followed by cryogenic treatment(-60 and -196℃) for 8hrs.All sample were temepered twice at 500℃ for 2hrs. Quench-Polish-Quench (QPQ)...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2015
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| Online Access: | http://ndltd.ncl.edu.tw/handle/00432079007790417342 |