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2.25Cr1Mo0.25V steel large-sized tube body forge piece forging rolling combined manufacturing method

A 2.25cr1mo0.25v, large cylinder technology, applied in the direction of metal rolling, metal processing equipment, etc., can solve the problems of multiple fires to produce finished products, multiple hole reaming, etc., to reduce operating hours, shorten the processing process, size Improved effect

Active Publication Date: 2019-01-18
ANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the problems and defects of multiple reaming and multi-fired finished products in the manufacture of large-scale cylinder forgings in the prior art, and to provide a 2.25Cr1Mo0.25V steel large-scale cylinder forging forging The roll-bonding manufacturing method realizes thermal processing and manufacturing of large-scale cylinder forgings of 2.25Cr1Mo0.25V steel for hydrogenation reactors

Method used

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  • 2.25Cr1Mo0.25V steel large-sized tube body forge piece forging rolling combined manufacturing method
  • 2.25Cr1Mo0.25V steel large-sized tube body forge piece forging rolling combined manufacturing method
  • 2.25Cr1Mo0.25V steel large-sized tube body forge piece forging rolling combined manufacturing method

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Embodiment 1

[0041] The 2.25Cr1Mo0.25V steel large cylinder forging combined forging and rolling manufacturing method of this embodiment includes the following steps:

[0042] (1) 2.25Cr1Mo0.25V steel smelting and ingot casting. Process flow: electric furnace→refining furnace→vacuum casting. It mainly meets the requirements of furnace body inclusions and raw materials, as well as the process parameters of electric furnace, refining furnace and ingot casting process. Specifically, the steel tapping conditions are guaranteed: the composition and temperature of 2.25Cr1Mo0.25V steel meet the requirements. The 2.25Cr1Mo0.25V steel ingot adopts the 24-edge ingot type with upper injection, and the weight of the ingot is 222t. The ingot quality is guaranteed by a series of parameters of the vacuum pouring system, including: vacuum argon blowing, pouring speed and temperature, etc.

[0043] (2) 2.25Cr1Mo0.25V steel large cylinder forging combined forging and rolling forming process. Forming pro...

Embodiment 2

[0059] The 2.25Cr1Mo0.25V steel large cylinder forging combined forging and rolling manufacturing method of this embodiment includes the following steps:

[0060] (1) 2.25Cr1Mo0.25V steel smelting and ingot casting. Process flow: electric furnace→refining furnace→vacuum casting. The 2.25Cr1Mo0.25V steel ingot adopts the upper injection 24 edge ingot type, and the weight of the ingot is 249t. The ingot quality is guaranteed by a series of parameters of the vacuum pouring system, including: vacuum argon blowing, pouring speed and temperature, etc.

[0061] (2) 2.25Cr1Mo0.25V steel large cylinder forging combined forging and rolling forming process. Forging-rolling combined forming process: 2.25Cr1Mo0.25V steel large cylinder forging combined forging-rolling forming process. Forming process combined with forging and rolling: gas cutting → upsetting → punching → mandrel elongation → horse bar reaming → barrel section rolling mill rolling. The specific process regulations formu...

Embodiment 3

[0077] The 2.25Cr1Mo0.25V steel large cylinder forging combined forging and rolling manufacturing method of this embodiment includes the following steps:

[0078] (1) 2.25Cr1Mo0.25V steel smelting and ingot casting. Process flow: electric furnace→refining furnace→vacuum casting. It mainly meets the requirements of furnace body inclusions and raw materials, as well as the process parameters of electric furnace, refining furnace and ingot casting process. Specifically, the steel tapping conditions are guaranteed: the composition and temperature of 2.25Cr1Mo0.25V steel meet the requirements. The 2.25Cr1Mo0.25V steel ingot adopts the upper injection 24 edge ingot type, and the weight of the ingot is 249t. The ingot quality is guaranteed by a series of parameters of the vacuum pouring system, including: vacuum argon blowing, pouring speed and temperature, etc.

[0079] (2) 2.25Cr1Mo0.25V steel large cylinder forging combined forging and rolling forming process. Forging-rolling ...

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Abstract

The invention relates to a 2.25Cr1Mo0.25V steel large-sized tube body forge piece forging rolling combined manufacturing method, which concretely comprises the following steps of 1, 2.25Cr1Mo0.25V steel smelting and ingot casting including the technological processes of electric furnace, refining furnace, vacuum pouring and steel ingot obtaining; 2, 2.25Cr1Mo0.25V steel large-sized tube body forgepiece forging rolling combined formation technological processes including oxygen-acetylene cutting, upsetting, hole punching, core rod drawing out, saddle forging and tube node rolling mill rollingaccording to the rolling schedule; 3, 2.25Cr1Mo0.25V steel large-sized tube body forge piece control cooling technological procedures including an online spray quenching technological procedure curveand a tempering technological procedure curve; 4, test and inspection. The method has the advantages that the forging and rolling are combined; the flow process is shortened; the efficiency is improved; the online spray quenching and tempering is realized; the product quality is improved; the method belongs to an advanced manufacturing method of the 2.25Cr1Mo0.25V steel large-sized tube body forgepiece.

Description

technical field [0001] The invention relates to a method for manufacturing a large cylinder forging, in particular to a method for manufacturing a 2.25Cr1Mo0.25V steel large cylinder forging combined with forging and rolling, and belongs to the technical field of large cylinder forging manufacture. Background technique [0002] The petroleum and petrochemical industry is an industry that provides fuel and important raw materials for various industries in the national economy. It is the foundation of economic development and the top priority of the energy industry. As the main reaction device of petroleum refining, the hydrogenation reactor is a key component of modern petroleum refining equipment. Its main function is to hydrogenate crude oil under high temperature and high pressure, so that crude oil can be converted into light oil under the action of catalyst; hydrogenation reaction The reactor is mainly composed of ball head, cylinder body, connecting pipe section, intern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21J5/00B21H1/06C21D8/00
CPCB21C37/06B21H1/06B21J5/002C21D8/005
Inventor 贾斌马洪儒韩玉坤
Owner ANYANG INST OF TECH
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