| 摘要 |
<p>PURPOSE:To automatically execute quenching treatment of a steel produce by continuously shifting the steel product to be treated to preparing chamber and heating chamber under non-oxidizing atmosphere and to rapid cooling device by shifting means at the time of executing the high frequency bright quenching to the steel product. CONSTITUTION:The work piece W to be quenching-treated is put on the placing device 411 before the preparing chamber 10, and by opening a valve V1, a turn table 42 is rotated toward the arrow mark A, to charge the above product in the preparing chamber 10. The valve V1 is closed and after supplying reducing gas in the preparing chamber 10 and heating chamber 20 by a gas supplying means, the valve V2 is opened to carry the product into the heating chamber 20. In there, the work piece W is raised to position of a high frequency heating induction coil 22, to heat at the prescribed temp. by induction current. Successively, the work piece W is descended by a second cylinder 44 and after quenching by dipping in cooling liquid L, the work piece is ascended by a first cylinder 43, to take out it to the pen air. During this operation, as the work piece W is heated and quenched while rotating it by rotating means 451, 452, 453, the bright quenching is easily and automatically executed under non-oxidation.</p> |
