Heat treatment tooling for large thin-walled rotary steel castings and its application method

Abstract

The invention relates to the technical field of heat treatment of steel castings, in particular to a heat treatment tooling for large thin-walled rotary steel castings and a method for using the same, wherein the heat treatment tooling for large thin-walled rotary steel castings includes two or more layers A number of radial ties are arranged in the revolving body to support the inner wall of the revolving body. The radial ties of each layer intersect and are fixed at the center of gyration of the revolving body. The intersection points between adjacent upper and lower radial ties and the diameter of the lowest layer A vertical support rod is provided below the intersection point of the ties, the radial ties are fixed by spot welding to the inner wall of the revolving body, and the radial ties are welded and fixed at the intersection of the center of the revolving body. The heat treatment tooling and the use method of the invention can reduce the deformation of thin-walled castings during heat treatment, simplify the process after the heat treatment of the castings, improve the production efficiency of the castings, and shorten the production cycle.

Description

technical field [0001] The invention relates to the technical field of heat treatment of steel castings, in particular to a heat treatment tool for large thin-walled revolving steel castings and a method for using the same. Background technique [0002] During the heat treatment of large thin-walled rotary steel castings, due to the existence of heat treatment stress (thermal stress and structural stress), uneven structure, phase transformation and other reasons, it is easy to cause deformation of the casting. In addition, factors such as improper support of the casting when it is heated and cooled in the heat treatment furnace and the self-weight of the casting itself will cause the deformation of the casting. This kind of deformation will cause part of the casting to be missing, and repair welding will cost a lot of cost; the correction for the deformation will also consume a certain amount of manpower and material resources, and will seriously affect the production cycle ...

AI Technical Summary

Problems solved by technology

It is more effective to prevent the deformation of castings by increasing subsidies, but it increases the consumption of molten steel, so that the shape and size of castings are quite different from the drawings. After the castings are cast, the subsidies must be removed, which increases the workload of cleaning the castings accordingly It also increases the amount of machining and increases the cost of castings

At the same time, the subsidized part will produce a serious oxygen cutting scar, which seriously affects the appearance quality of the casting, and the cutting part needs gouging, resulting in increased hardness and affecting the machining performance

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