Preparation method of three-way product

A tee and product technology, which is applied in the field of tee product preparation, can solve the problems of difficult manufacturing and the inability of finished products to meet the demand of tee products, and achieve the effects of reducing the difficulty of research and development, avoiding repeated heating, and solving technical bottlenecks

Active Publication Date: 2020-11-03
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the production of tee products in the prior art is difficult and the finished products produced by the existing technology cannot meet the needs of tee products

Method used

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  • Preparation method of three-way product
  • Preparation method of three-way product
  • Preparation method of three-way product

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preparation example Construction

[0030] A kind of tee product preparation method of the present invention, this welding method comprises the following steps:

[0031] Step S100, rolling a steel plate with a preset size into a roll;

[0032] Step S200, performing the first welding on the splicing gap of the reel to obtain a prefabricated reel;

[0033] Step S300, forming the prefabricated roll through extrusion and drawing forming process to obtain the first prefabricated tee;

[0034] Step S400, performing heat treatment on the first prefabricated tee, and the heat treatment includes quenching heat treatment and first tempering heat treatment;

[0035] Step S500, performing internal welding on the heat-treated first prefabricated tee piece, and then removing the weld metal produced by the first welding and performing external welding to obtain a second prefabricated tee piece;

[0036] Step S600, performing a second tempering heat treatment on the second prefabricated three-way piece to obtain a third prefa...

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Abstract

The invention belongs to the technical field of steel welding, particularly relates to a preparation method of a three-way product, and aims to solve the problems that in the prior art, the three-wayproduct is high in production and manufacturing difficulty, and a finished product manufactured through an existing process cannot meet the requirements of the three-way product. The invention provides the preparation method of the three-way product. The preparation method comprises the following steps of rolling a steel plate with a preset size into a winding drum, pre-welding a splicing gap of the winding drum, and performing forming treatment to obtain a first prefabricated three-way piece; enabling the first prefabricated three-way piece to be subjected to quenching and first tempering heat treatment; and performing internal welding on the first prefabricated three-way piece obtained after heat treatment, then removing pre-welded metal, conducting external welding, and finally conducting secondary tempering heat treatment. By means of the preparation method of the three-way product, the fusion depth of each layer of weld joint is effectively controlled, so that the performance indexes such as strength, toughness and hardness of the weld joint meet the requirements of related technical specifications. The difficulty of product process control is reduced, and the stability and reliability of product quality and performance are improved.

Description

technical field [0001] The invention belongs to the technical field of steel welding, and in particular relates to a method for preparing a tee product. Background technique [0002] With the demand for the construction of oil and gas transmission pipelines in alpine regions such as the China-Russia East Route and the West-East Gas Pipeline Project, the quality and performance requirements for products such as pipelines and pipeline accessories have also been continuously improved. The steel grade of the pipeline is required to be X80, the maximum diameter reaches DN1400, and the service environment temperature is as low as -45°C. Corresponding pipeline accessories such as tee products must also have corresponding performance indicators. The tee product is the part with the most concentrated stress in the pipeline. The wall thickness of the tee product with the same pressure bearing capacity is much larger than that of the pipeline. Therefore, the tee product is more difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 白雷杰吴亚军赵志伟巩忠旺刘旭张海波白福良陈跃华黎郑坤
Owner BC P INC CHINA NAT PETROLEUM CORP
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