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

A technology of revolving body and steel castings, which is applied in the field of heat treatment tooling for large-scale thin-walled revolving body steel castings, can solve the problems of affecting the machining performance, increasing the cost of castings, oxygen cutting scars, etc. Effect of preventing deformation by heat treatment, reducing size and weight

Active Publication Date: 2017-01-04
KOCEL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Effect test

Embodiment 1

[0022] Such as figure 1 with figure 2 Shown is the heat treatment tooling for large thin-walled revolving body steel castings of the present invention, including two or more layers of radial tie bars 2 arranged in the revolving body 1 for supporting the inner wall of the revolving body 1, each layer of each The radial tie bars 2 intersect and are fixed at the center of rotation of the rotary body 1. A vertical support rod 3 is provided between the intersection points of the adjacent upper and lower radial tie bars 2 and below the intersection point of the lowest layer of radial tie bars 2. The tie bars 2 and the inner wall of the revolving body 1 are fixed by spot welding, and the radial tie bars 2 are welded and fixed at the intersection of the center of the revolving body 1 .

[0023] In order to further realize the balanced support of the rotary body casting up and down and in the radial direction, the radial tie bars 2 of the upper and lower adjacent layers are arranged ...

Embodiment 2

[0030] Adopt the above-mentioned large-scale thin-walled revolving body class steel casting heat treatment frock to prevent the using method of casting heat treatment deformation, the large-scale thin-walled steel casting in this method has a diameter of 4 meters, a height of 1 meter, and the wall thickness of the revolving body is 40mm. The heat treatment of the technical method has a large amount of deformation and a large amount of work in the later stage of plastic treatment. The method of the present invention is used to set the supporting tooling inside the rotary body through the following steps before heat treatment:

[0031] 1) In this embodiment, the radial ties 1 are arranged in upper and lower layers, the angle between the adjacent radial ties in each layer is 90°, and the radial ties in the upper and lower layers are staggered at 45°, and the diameter of the upper and lower layers The vertical distance to the tendons is 0.4 meters, and the distance between the uppe...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/00
Inventor 李少雨罗永建唐钟雪冯周荣闫新飞何启良田成刚程勤
Owner KOCEL STEEL
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