渗碳齿轮淬火后,鉴于某些原因,内在键孔常缩小,但有时会发生胀大现象。变形量超差,则必须采取措施予以抢救。內花键孔缩小,可采用齿轮盐浴加热,出炉塞芯棒淬火。高溫下钢处于塑性良好的奥氏体状态,以冷硬芯棒挤压内孔,使孔胀大,淬火时则阻止收缩,从而使孔圹大达到要求。但齿轮内花键孔胀大后,怎样使其缩小呢?我们根据淬火工件应力分布状态对内孔变形的影响,以齿轮内孔高频加热水冷淬火,使渗碳淬火齿轮胀大的内 Carburizing gear after quenching, for some reason, the inner keyhole often shrink, but sometimes swell occurs. Out of tolerance, you must take measures to be rescued. Reduced within the spline hole, gear salt bath heating can be used, baked plug mandrel quenching. High temperature steel in good austenitic plastic state, with cold hard mandrel squeeze the hole, the hole swell, quenching, while preventing shrinkage, so that the hole 圹 big meet the requirements. However, the gear spline hole swollen, how to make it smaller? We quenching the workpiece stress distribution on the bore deformation, the gear bore high-frequency heating water quenching, so carburizing quenching gear swollen within