外壳是石油钻机涡轮钻的关键部件,这种超长管件材质为41 Cr4,内径尺寸为130～170mm,长度6m左右。以往,外壳的热处理是在井式炉中单根加热后油冷淬火。淬火时,由于管内油温急剧升高,产生压力,大量燃油常常从管中喷出,造成火灾。既使在吊具上加安全罩,也因为喷出的燃油在淬火油面上燃烧,而不利于安全生产。 Shell is a key component of oil drilling turbine drilling, this long tube material is 41 Cr4, diameter size of 130 ~ 170mm, length 6m or so. In the past, the heat treatment of the shell was oil-cooled and quenched after the single-well heating in the pit furnace. Quenching, due to a sharp rise in oil temperature inside the tube, resulting in pressure, a lot of fuel is often ejected from the tube, causing a fire. Even in the spreader plus safety cover, but also because of the jet of fuel in the quenching oil surface combustion, but not conducive to safe production.