A wear-resistant screw of a twin-screw extruder and its processing technology
A twin-screw extruder and machining technology, applied in metal material coating process, coating, melt spraying, etc., can solve the problems of screw failure, screw component wear, high cost of screw, etc., to achieve tight combination and fixation , Improve the wear resistance, and the effect of low processing difficulty
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[0026] see figure 1 and figure 2 According to the wear-resistant screw of a twin-screw extruder provided by the present invention, the main technical scheme adopted is: the kneading block 2 of the screw 1 includes a steel substrate 3, a silicon nitride ceramic rod 4 and an alloy coating 5. Dimples 6 are evenly distributed on the outer surface of the steel base 3 parallel to the axial direction of the screw 1, half of the silicon nitride ceramic rod 4 in the length direction is in the dimples 6, so The other half of the silicon nitride ceramic rod 4 in the length direction is exposed outside the surface of the substrate 3, the alloy coating 5 covers the entire surface of the substrate 3, and the top end of the silicon nitride ceramic rod 4 is exposed Outside the alloy coating 5 . The wear resistance of the kneading block can be significantly improved by introducing silicon nitride ceramic components with extremely high hardness on the surface of the steel substrate 3, especi...
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