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我厂生产的游星架系40CrNiMoA钢制,经调质处理,成品表面镀镉,镉层厚0.008～0.012毫米。在向直升机主旋翼轴上装配时应加温,以保证获得紧配合。规定加温温度为150℃,时间为1.5小时。一九八一年,一批准备装配的游星架在加温过程中,因电炉温度测量严重失误而超温,甚者表面已呈兰色,实际加热温度在320℃左右。通常认为,镀镉件“过热”,可能导致后果十分严重的“镉脆”。某厂生产的压气机
The planet carrier system produced by our factory is made of 40CrNiMoA steel. After quenched and tempered, the surface of the finished product is coated with cadmium. The thickness of cadmium layer is 0.008 ~ 0.012mm. The helicopter main rotor shaft assembly should be warmed to ensure a tight fit. Prescribed heating temperature of 150 ℃, the time is 1.5 hours. In 1981, a batch of swimming star racks to be assembled was overheated due to serious errors in the temperature measurement of the electric furnace, or even the surface of the planet was blue. The actual heating temperature was about 320 ° C. It is generally accepted that “overheating” cadmium plating can lead to “cadmium embrittlement” with very serious consequences. A factory production of the compressor