| CPC C21D 11/005 (2013.01) [C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/065 (2013.01); C21D 9/525 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/50 (2013.01)] | 10 Claims |

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1. A method for controlling carbide network in a bearing steel wire rod by controlling cooling and controlling rolling, characterized in comprising
rolling a bar to a wire with a specified specification and spinning it into a coil, controlling the rolling temperature at 780° C.-880° C.; and controlling the spinning temperature at 750° C.-850° C.;
on-line controlling cooling of continuous coils using EDC water bath austempering cooling process, controlling the cooling rate at 2.0° C./s-10° C./s, and controlling a final cooling temperature within 620-630° C.;
after EDC water bath austempering cooling, slow cooling under a cover, and the temperature is controlled to be 400° C.-500° C. when being removed out of the cover;
after slow cooling, collecting coils, and cooling in air to a room temperature.
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