Carburizing and quenching deformation control method for gears of large-sized heavy-load locomotive

Abstract

The invention provides a carburizing and quenching deformation control method for gears of a large-sized heavy-load locomotive. The method comprises the steps of laminating two steel plates with the same shapes with spoke plates of gears to sunken parts on two sides of the spoke plates of the gears by virtue of a compensation method, penetrating lightening holes in the spoke plates of the gears by bolts to fix the upper and lower steel plates and avoid relative displacement, sequentially charging the gears of the heavy-load locomotive into a furnace according to design requirements of a conventional process, and carrying out carburizing and quenching. According to the method, two sides of the spoke plates of the gears are clamped and compressed by the upper and lower steel plates, so that the bending of the spoke plates is avoided, the temperature differences among parts of the gears are uniformed, the large thermal stress and the large structural stress caused due to different sectional dimensions are reduced, and therefore, the deformation of the gears is reduced; furthermore, the carburization can be effectively prevented, the manufacturing cost for coating a seepage-proofing agent and maintaining machining allowance is lowered, the production cycle is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of carburizing and quenching and deformation control of iron and steel workpieces, in particular to a method for controlling the deformation of heavy-duty locomotive gears during carburizing and quenching. Background technique [0002] In order to obtain a certain strength, toughness and wear resistance, gear parts need to undergo a series of heat treatments such as quenching and tempering, carburizing and quenching, and tempering. During the carburizing and quenching process, the gear deformation is large and difficult to control due to the combined effects of thermal stress, structural stress and the self-weight of the part. The high speed and heavy load of high-power and heavy-duty locomotive gears, especially the carburizing and quenching mass production of gears with web structure, put forward higher requirements for manufacturing accuracy. The heat treatment deformation control method of such gears o...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for controlling carburizing and quenching deformation of heavy-duty locomotive gears in view of the deficiencies in the prior art, aiming at solving the problem of large amount of carburizing and quenching deformation and high scrap rate of existing heavy-duty locomotive gears. High, long production cycle, high cost

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