| 摘要 |
PROBLEM TO BE SOLVED: To provide a thick steel plate excellent in the wear resistance of the steel plate surface and punched face and excellent in fatigue characteristics and impact characteristics by allowing it to contain C and Mn respectively of specified amounts by weight %. SOLUTION: This steel plate for a plate disk clutch contains, by weight, <=0.3% C and 0.6 to 1.5% Mn. By reducing the C content and increasing the Mn content, the strength of the hot rolled plate is made high, the hardness required for wear resistance can be obtd. even at a low cold rolling rate, and simultaneously, even in the case annealing is obviated, the steel plate good in punchability can be obtd. Since, in the case annealing is obviated, and the production is made possible even at a low cold rolling rate, its impact characteristics is made satisfactory, and the quantity of the punched face to be worked and hardened is also made large, so that the wear resistance of the punched face improves, the plate thickness at the time of being passed through hot rolling and pickling stages is inevitably made thin, the process performance does not cause defects, and the production of a thick product is made possible.
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