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Grain refining casting method for high manganese steel casting

A high-manganese steel, fine-grained technology, applied in the field of casting, can solve the problems of high-manganese steel castings, such as coarse grains, affecting the quality of castings, and micro-cracks, to achieve increased grain refinement, high raw material utilization, and grain refinement effect

Inactive Publication Date: 2015-04-29
青岛齐力铸钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current casting process of high manganese steel castings, the temperature of the molten metal is too high during the manufacturing process, resulting in problems such as coarse grains, looseness, and microcracks of high manganese steel castings, which seriously affect the quality of castings

Method used

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Embodiment

[0016] The fine-grained casting method of the high manganese steel casting of the present embodiment comprises the following steps:

[0017] (1) The molten steel is released at a high temperature, the temperature of which is 1590°C. After the furnace is released, it is refined by blowing argon outside the furnace and feeding wire. The content of phosphorus and sulfur is strictly controlled at P=0.020%, S=0.016%, and the pouring temperature is 1490°C;

[0018] (2) During the pouring process of high manganese steel castings, metal particles with a weight ratio of 5% and a size of φ6mm are added with the molten metal;

[0019] (3) Metal particles are added from the gating system of the casting, and the preheating temperature of the metal particles is 300°C;

[0020] (4) The castings are poured quickly, and the bottom leak bag is used to avoid the inclusion of inclusions.

[0021] The fine-grained casting process of high manganese steel castings can directly cast fine-grained hig...

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Abstract

The invention discloses a grain refining casting method for a high manganese steel casting. The method comprises the following steps: during a smelting process of the high manganese steel, discharging molten steel from a furnace at high temperature, blowing argon and feeding wire for refining after discharging from the furnace, and strictly controlling the content of phosphorus and sulfur in the molten steel; during a pouring process of the high manganese steel casting, adding metallic particles by following the flow, reducing molten metal storage energy and quickening the cooling of the casting, adding the metallic particles into a pouring system of the casting in the middle and later periods of the whole pouring process, uniformly adding at one time or in batches, quickly pouring the casting, and adopting a bottom leakage package for preventing impurities from being involved. According to the method provided by the invention, the defect of the ultrahigh temperature of the molten steel in the prior art is overcome and the nucleation particle refining grains are added, so that the problems of thick grains, loosening, micro-cracks, and the like of the high manganese steel casting are solved, the high manganese steel casting with grain refinement and high strength is produced, and the casting quality is effectively ensured.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a fine-grain casting method for high manganese steel castings. [0003] Background technique [0004] Manganese steel is a high-strength manganese-resistant steel. It is mainly used in harsh working conditions such as impact, extrusion, and material wear. The main damage form is wear and tear, and it is broken and deformed. In the current casting process of high manganese steel castings, the temperature of molten metal during the manufacturing process is too high, which causes problems such as coarse grains, looseness, and microcracks of high manganese steel castings, which seriously affects the quality of castings. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems existing in the prior art field, the purpose of the present invention is to provide a high manganese steel casting method for fine grain ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/20
CPCB22D27/20
Inventor 刘占向
Owner 青岛齐力铸钢有限公司
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