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Water-cooling die casting production process of plate blank used for medium plate

A technology of water-cooled mold casting and production process, which is applied in the direction of manufacturing tools, casting equipment, metal processing equipment, etc. It can solve the problems of low production efficiency, shrinkage cavity, high mold consumption, etc., and achieve the effect of ensuring quality and reducing secondary oxidation

Inactive Publication Date: 2010-08-04
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first is the traditional die-casting slab. This ingot casting method can produce high-quality slabs, but the mold consumption is high, and defects such as segregation and shrinkage are prone to occur; The subsequent furnace loading and rolling will lead to low production efficiency; at the same time, due to the low utilization rate of the cap opening and the high cost of casting ingots, the working conditions of the workers are poor
[0004] The second is continuous casting machine slab, which is more commonly used at present. The continuous casting machine has many supporting equipment, complex mechanism, large investment, and there are many internal quality problems in the casting slab. The temperature of molten steel is strict during pouring, and pouring is difficult to control. , especially in the production of high-alloy steel and high-demand die steel, the continuous casting machine cannot be used to cast qualified blanks
The disadvantage is that there are serious defects such as surface turning pits due to lack of protective pouring, or improper protective pouring methods and fast cooling of the slab resulting in slag curling defects

Method used

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  • Water-cooling die casting production process of plate blank used for medium plate
  • Water-cooling die casting production process of plate blank used for medium plate

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with embodiment.

[0018] A water-cooled die-casting production process for high-demand mold steel P80 medium-thick plate slabs. This production process uses argon protection pouring during the entire pouring process to prevent the molten steel from contacting the air after flowing out of the nozzle during the pouring process; The solid mold powder is used to protect the pouring to ensure the surface quality of the slab; the rising hole of the convection steel is adjusted to make the molten steel rise steadily in the water-cooled die casting to ensure the surface quality of the slab; the details are as follows:

[0019] During the whole pouring process, argon protection pouring is used, figure 1 It is a schematic diagram of the argon protective casting adopted in the present invention. The pouring device consists of an argon group 1 , an argon pipeline 2 , an argon blowing double ring 3 and a sealing ...

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Abstract

The invention discloses a water-cooling die casting production process of a plate blank used for a medium plate, which is characterized in that the production process adopts the protective pouring of argon gas in the overall process of the pouring so as to realize that the contact of molten steel with the air is isolated in the pouring process after the molten steel flows out from a water gap; the protective pouring of solid covering slag is adopted to ensure the surface quality of a casting blank; and an ascending hole of flow steel is regulated to enable the molten steel to stably ascend in water-cooling die casting, and the surface quality of the casting blank is ensured. The invention avoids the defects of skull patch, pits and the like of the surface and the defect of slag entrapment when the water-cooling die casting is adopted to produce the blank of the medium plate, and the adopted protective pouring reduces the secondary oxidation of the molten steel in the pouring process, has a certain adsorption function to inclusion and ensure the quality of the blank of the medium plate. The invention is suitable for the production process of the blank of a high-alloy steel medium plate of die steel with high requirement.

Description

technical field [0001] The invention relates to a metallurgical process, in particular to a water-cooled die-casting production process for slabs for medium-thick steel plates with high standards and high requirements. Background technique [0002] At present, the most commonly used blanks for medium and thick plates are the following three: [0003] The first is the traditional die-casting slab. This ingot casting method can produce high-quality slabs, but the mold consumption is high, and defects such as segregation and shrinkage are prone to occur; Subsequent furnace loading and rolling will result in low production efficiency; at the same time, due to the low utilization rate of the cap opening and the high cost of casting ingots, the working conditions of the workers are harsh. [0004] The second is continuous casting machine slab, which is more commonly used at present. The continuous casting machine has many supporting equipment, complex mechanism, large investment,...

Claims

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Application Information

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IPC IPC(8): B22D7/06B22D41/58
Inventor 于小方张逖殷皓
Owner NANJING IRON & STEEL CO LTD
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