我厂生产的柴油机燃油系统的油泵精密偶件——喷油嘴偶件(图1),用GCr 15制成,要求HRC 62～64,良好的耐磨性及不变形或少变形。原来采用中性盐浴炉加热,后来采用了含8～10％氰化盐浴,但热处理以后的清洗工作一直是个困难问题,尤以封闭式喷油嘴体(图1b、c)的细小喷孔(孔径0.25～0.35毫米),经常被残盐所阻塞,清洗时稍一不慎就造成喷孔堵塞,中孔及座 Our factory production of diesel fuel system pump precision coupling - nozzle even (Figure 1), made with GCr 15, requires HRC 62 ~ 64, good wear resistance and no deformation or less deformation. The original neutral salt bath furnace heating, and later used with 8 to 10% cyanide salt bath, but cleaning work after the heat treatment has been a difficult issue, especially closed injector body (Figure 1b, c) fine spray Hole (aperture 0.25 ~ 0.35 mm), often blocked by residual salt, cleaning a little carelessness will cause the nozzle hole is blocked, the hole and seat