Preparation method of stainless steel bearing steel pipe and ferrule

Abstract

The invention discloses a preparation method of a stainless steel bearing steel tube. The method can improve yield and production efficiency and comprises the steps of: 1) heating and perforating: heating a round bar to 1,040 DEG C-1,070 DEG C, carrying out thermal insulation for 20-30 minutes, perforating at a speed of 10-18 meters per minute, thus obtaining a tube blank; 2) annealing at equal temperature: heating the tube blank to 830-850 DEG C, carrying out thermal insulation for 2-3 hours, then cooling to 700-720 DEG C at a cooling speed less then 30 DEG C per hour, and then discharging under the condition that a cooling speed is less than 50 DEG C per hour; 3) rolling: heating the annealed tube blank to 250-300 DEG C, and then rolling the annealed tube blank into a bearing steel tubewith a given size at a speed of 7-8mm per minute; and 4) stress relief annealing: increasing the temperature of the rolled bearing steel tube to 760-780 DEG C, carrying out thermal insulation for 2-3hours, then discharging under the condition that a cooling speed is less than 50 DEG C per hour. By adopting the preparation method, the stainless steel round bar made from 3Cr13 can be manufactured into the bearing steel tube meeting the requirement.

Description

Technical field [0001] The invention relates to a method for preparing a bearing ring, in particular to a method for preparing a stainless steel bearing ring. Background technique [0002] With the widespread application of maintenance-free technology, stainless steel bearings have been widely used in food machinery, daily-use machinery and various corrosion-resistant fields. Due to the particularity of the stainless steel material, the current stainless steel bearings can only be turned by round steel rods and then stamped complete sets of rings. The traditional perforated pipe making process cannot be used to process stainless steel bearing rings. This makes the yield rate of round steel rods very high. Low, the production efficiency of stainless steel bearing rings is low. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing a stainless steel bearing steel pipe which can improve the yield rate and pr...

AI Technical Summary

Problems solved by technology

Due to the particularity of the stainless steel material, the current stainless steel bearings can only be turned by round steel rods, and then stamped into rings. The traditional perforated pipe making process cannot be used to process stainless steel bearing rings, which makes the yield of round steel rods very high. Low, low production efficiency of stainless steel bearing rings