Method for manufacturing large hollow steel ingots by forced cooling with single sleeves

A technology for forced cooling and hollow steel, applied in the field of manufacturing large-scale hollow steel ingots, can solve the problems of complex core structure production, complex assembly, high labor intensity of workers, etc., and achieve the effect of shortening smelting cycle, reducing power consumption and high cooling intensity

Active Publication Date: 2014-09-24
TIANJIN HEAVY EQUIP ENG RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has prepared a certain number of hollow steel ingots, and has been applied to the hydrogenation reactors of some domestic manufacturers, but the core structure of this method is complicated to manufacture, the labor intensity of workers is high, and the assembly is complicated

Method used

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  • Method for manufacturing large hollow steel ingots by forced cooling with single sleeves
  • Method for manufacturing large hollow steel ingots by forced cooling with single sleeves
  • Method for manufacturing large hollow steel ingots by forced cooling with single sleeves

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Embodiment Construction

[0023] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] It consists of a single-layer sleeve core structure device, mixed gas forced cooling technology and gating system device. The horizontal channel of molten steel is installed on the lower chassis, the upper chassis is installed above the horizontal channel of molten steel, and the core is installed in the center of the upper chassis; the single-layer sleeve is located outside the core, and the outside of the sleeve is coated with high-temperature resistant Amercoat873AL silver paint, which is in contact with the cooling gas The surface is coated with Amercoat873AL black paint; several support ribs are welded inside the sleeve, and the bottom of the support ribs is 20-60mm away from the bottom end of the sleeve; a steel ingot mold is installed on the outer edge of the upper chassis, an insulation cap is installed on the steel ingot mold, and...

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Abstract

A method for manufacturing large hollow steel ingots by forced cooling with monolayer sleeves includes: firstly, cooling a casting system before casing, secondly, opening water gaps of refining ladles to begin to cast while performing forced cooling under assist of hydrogen liquid; thirdly, adding exothermic compounds and heat preservation agents after finishing casting, cooling by air blowers only; fourthly, stopping blowing cooling after solidification of steel ingots, cooling the steel ingots naturally, and hoisting cores by a crane; and fifthly, hoisting heat-insulation caps by the crane, and clamping the steel ingots by special clamps and placing the same on a steel ingot transport cart.

Description

technical field [0001] The invention relates to a method for manufacturing a large hollow steel ingot, in particular to a method for manufacturing a large hollow steel ingot by forced cooling of a single-layer sleeve. Background technique [0002] At present, almost all large-scale hollow forgings in China are produced by solid steel ingots. The solid steel ingots adopt blanking, upsetting, punching and reaming processes. The yield is low, resulting in higher production costs. In addition, due to the A segregation of the solid steel ingot, after the forging is processed, the outer surface is prone to defects such as uneven composition and exposed inclusions caused by segregation. Industrially developed countries such as Japan and France have successively developed and successfully produced hollow steel ingots. For reasons of confidentiality, my country has no ready-made technical materials for reference. With the rapid development of my country's nuclear power, petrochemic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/04
Inventor 王欢李金良巴钧涛
Owner TIANJIN HEAVY EQUIP ENG RES
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