Heat treatment method for high strength steel thin-walled cylinder bodies provided with sealing heads

Abstract

The invention discloses a heat treatment method for high strength steel thin-walled cylinder bodies with sealing heads, wherein the heat treatment method belongs to the technical field of heat treatment and is particularly suitable for solving the problem that the cylinder bodies deform when the high strength steel thin-walled cylinder bodies with the sealing heads are heat-treated. The heat treatment method is characterized in that each thin-walled cylinder body internally equipped with a thin-walled cylinder body sizing device is together loaded in a vacuum tempering furnace for vacuum sizing tempering, wherein the patent number of the thin-walled cylinder body sizing device is ZL200920259747.3; the quenching deformation of a workpiece can be eliminated effectively during the heat treatment process by utilizing phase transition superplasticity on the premise that the mechanical properties of workpiece materials are qualified and the hardness of the workpiece is uniform; when vacuum quenching and tempering are performed, one end of each thin-walled cylinder body, where the corresponding sealing head is arranged, faces up, the opening end of each thin-walled cylinder body faces down, and the space between any two adjacent cylinder bodies is a quarter to a half of the diameter of each cylinder body; and after quenching and tempering are finished, the thin-walled cylinder bodies are freely cooled down in a quenching furnace and the tempering furnace respectively until the room temperature is reached. The heat treatment method has the advantages of simplicity and remarkable and stable deformation eliminating effect.

Description

technical field [0001] The invention relates to a heat treatment method for a high-strength steel thin-walled cylinder with a head, which belongs to the technical field of heat treatment, and is particularly suitable for solving the deformation problem of the cylinder during heat treatment of a high-strength steel thin-walled cylinder with a head. Background technique [0002] The wall thickness of the high-strength steel thin-walled cylinder is generally less than 1.5% of its outer diameter. Because the wall thickness of the cylinder is very thin, it is usually not machined after quenching and tempering heat treatment, especially one end with a seal. The high-strength steel thin-walled cylinder of the head. After the heat treatment of the high-strength steel thin-walled cylinder with head, there is a common problem of deformation of the cylinder. In the background technology, at present, the vacuum heat treatment method and the post-correction method are generally used to ...

AI Technical Summary

Problems solved by technology

Although the deformation of vacuum quenching is generally small, because the wall thickness of the main part is less than 1.5% of its outer diameter, the vacuum quenching deformation is still relatively large, often reaching about 1mm or even 2mm, which cannot meet the dimensional accuracy requirements of the product

Using the post-correction method, due to the high hardness of the cylinder material, the correction effect is not ideal

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