Flat-bottom type bearing ring carbide refining method

Abstract

The invention discloses a method for refining carbide of a flat-bottom type bearing ring, and relates to the field of refining of carbide of all bearings, in particular to the method for refining the carbide of the flat-bottom type bearing ring, which comprises the following steps of: heating a bearing bar, carrying out cross piercing pipe type forging, forging into a pipe, carrying out air cooling and heat preservation for 1-3 hours, and then carrying out furnace cooling to room temperature; the cross piercing pipe is cut at the room temperature, the cut sample is subjected to axial closed rolling forming forging at the room temperature, and a bearing ring semi-finished product is obtained; and the bearing ring semi-finished product obtained after axial closed rolling forming forging is machined to the required size, and a flat-bottom type bearing ring finished product is formed. In the pipe forming step, annealing is used for replacing an original cooling mode, the hardness is reduced, the cutting performance is improved, the structure is adjusted, and preparation is made for next-step room-temperature cutting. And compared with a traditional machining process, the annealing process after forging is omitted, the heating number is reduced, the cost is reduced, and the time is saved.

Description

technical field [0001] The invention relates to the field of carbide refinement of other bearings, in particular to a carbide refinement method for flat-bottomed bearing rings. Background technique [0002] Bearings are widely used in major equipment fields such as high-end car manufacturing and heavy equipment, as well as emerging industries such as high-speed rail transportation, wind power generation, and aerospace. ". There are two main types of damage to bearings: primary contact fatigue damage and secondary wear damage. Bearings generally work in the harsh environment of repeated cyclic contact fatigue stress and sliding wear and need to withstand static and cyclic loads. Bearings are required to have high friction and wear resistance, plastic deformation resistance, high rotational accuracy and dimensional accuracy, and at the same time have a long long life and high reliability. With the rapid development of our country, there are more and higher requirements for ...

AI Technical Summary

Problems solved by technology

[0013] When using the method of controlling the cooling rate after forging, there are many requirements for the cooling method and cooling medium, and the practicability is limited to a certain extent

When adopting the method of increasing the heat treatment process after forging, due to the increase in the number of fires, the efficiency will decrease, the cost will increase, the energy consumption will increase, and the cycle will become longer

The heat treatment method and medium are also limited.

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