Heat treatment method for vertical autoclave used in deep sea simulated pressure test cylinder

Abstract

The invention relates to a heat treatment method of a vertical type pressure kettle for a deep sea simulation pressure test cylinder. The heat treatment method of the vertical pressure kettle for thedeep sea simulation pressure test cylinder is characterized in that a cylinder body of the vertical pressure kettle planed to carry out heat treatment is divided into an upper cylinder body and a lower cylinder body, wherein the upper cylinder body and a cylinder body end part are welded into an upper cylinder assembly, the lower cylinder body and a shell cover are welded to a lower cylinder assembly, the upper cylinder body assembly is conveyed into a heat treatment furnace, and the first heat treatment is carried out; the cylinder body end part and a flat cover assembly as well as a shearingring matching surface are subjected to finish machining, and are integrally welded with the lower cylinder assembly after finish machining is carried out, the lower cylinder assembly and the upper cylinder assembly are partially fed into the heat treatment furnace for secondary heat treatment, the residual small part of the upper cylinder assembly, the flat cover assembly and a shearing ring aresubjected to heat insulation protection outside a furnace. According to the heat treatment method, a segmented heat treatment method is adopted, so that the quality requirement of welding heat treatment is ensured, and the requirement for assembling and sealing on a water pressure test is ensured as well, so that the use requirement is met; and according to the method, the welding stress can be removed by the secondary heat treatment, so that it is ensured that the requirement for the assembling sealing precision of the flat cover assembly and the shearing ring after the cylinder body end partis subjected to the finish machining.

Description

technical field [0001] The invention relates to a heat treatment method for a vertical pressure kettle used for a deep-sea simulated pressure test cylinder. Background technique [0002] In the manufacturing process of pressure vessels, as the fields of pressure vessel equipment are used more and more widely, the requirements for the manufacture of pressure vessel equipment are getting higher and higher. To ensure the internal quality of pressure vessels and ensure the service life of pressure vessels, higher requirements are put forward for manufacturers of pressure vessel equipment. [0003] The main equipment of the deep-sea simulated pressure test tank is "vertical pressure kettle", which is a complete set of pressure vessel equipment with forged and welded structure. The working pressure of the equipment is 10MPa, and the design pressure is 11MPa. Tangential distance), with a total weight of about 132 tons, is a super-large equipment. [0004] Equipment used for under...

AI Technical Summary

Problems solved by technology

During the design process of the equipment, it was considered that if the overall welding and heat treatment method is adopted, two processes cannot be realized: first, there is no finishing equipment capable of carrying more than 100 tons to finish the end of the cylinder; 2. There is no rolling equipment for the cylinder steel plate (the cylinder is rolled with a steel plate with a thickness of 100mm, the outer diameter is φ3200mm, and the height is 6000mm)

Images