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工件在油中淬火时,采用机械搅动,加强了工件表面和油之间的相对运动,有助于蒸汽膜的先期破坏,缩短膜沸腾期和泡沸腾期,使油很快地将工件的热量带走,从而可提高油的冷却能力,而且使整个油槽内温度均匀。这样,可以防止油的局部过热,防止淬火工件产生软点和逆硬化现象,减小变形,缩短淬火时间,增加工件淬硬层深度。
When the workpiece is quenched in oil, mechanical agitation is used to strengthen the relative motion between the workpiece surface and the oil, which helps to pre-destroy the steam film and shorten the membrane boiling period and boiling period, so that the oil quickly heats the workpiece Take away, which can improve the cooling capacity of oil, but also the temperature uniformity within the tank. In this way, you can prevent local overheating oil to prevent quenching the workpiece soft points and reverse hardening phenomenon, reduce deformation, shorten the quenching time, increase the depth of the workpiece hardened layer.