Steel for ball screw bearing and manufacturing method thereof
A technology of steel for bearings and ball screws, applied in bearings, manufacturing tools, shafts and bearings, etc., can solve the problems of easy generation of bainite structure, easy deformation of heat treatment, high hardenability of steel, etc., and achieve secondary branching The effect of improving crystal arm spacing, improving and reducing composition segregation, and uniform rod structure
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[0065] The present invention will be described in further detail below in conjunction with the examples, which are exemplary and intended to explain the present invention, but should not be construed as a limitation of the present invention.
[0066] The manufacturing process of the steel for roller screw bearings of the present invention: primary smelting in electric furnace or converter—LF refining outside furnace—VD or RH vacuum degassing—continuous casting—squaring of continuous casting slab into intermediate billet—heating and rolling of intermediate billet into slab— Finishing - quenching and tempering heat treatment - car polishing - packing into storage.
[0067] Molten steel smelting: When smelting, use high-quality molten iron, scrap steel, high-quality deoxidizer and refractory materials. During the initial smelting production process, the tapping endpoint C is controlled at 0.10-0.25%, and the endpoint P is required to be ≤0.020%. Using the relationship between C a...
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