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Novel process for producing super high manganese steel casting

A technology of ultra-high manganese and new technology, applied in the direction of improvement of process efficiency, casting mold, casting mold composition, etc., can solve problems such as difficult to meet the user's high quality level, toughness reduction, uneven composition, etc., and achieve remarkable economic effects, Improvement of mechanical properties and improvement of casting quality

Inactive Publication Date: 2011-11-02
ANSTEEL GRP MINING CO LTD
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AI Technical Summary

Problems solved by technology

It is common to see brittle fracture due to the degree of toughness reduction, and the uneven composition leads to local non-wear resistance, which is difficult to meet the high-quality requirements of users.

Method used

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Examples

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Embodiment Construction

[0023] The specific implementation of the present invention will be described in detail below in conjunction with the examples.

[0024] According to the new ultra-high manganese steel smelting process of the present invention, it includes smelting Mn13, Mn13Cr2, Mn18 or Mn18Cr2 ultra-high manganese steel with an electric arc furnace: melting scrap steel into the furnace, blowing oxygen to boost melting, making slagging twice, testing components, adding Cr iron and Mn ferroalloy, the whole composition is qualified, and the steel is tapped, which is characterized in that the modification agent is introduced into the ladle to modify the molten steel two minutes before the tapping or after the tapping, and then the molten steel after the modification is purified by argon gas.

[0025] The weight percent of the formula of the modifier is: rare earth strontium alloy 10-20%, sodium-based glass powder 15-25%, vanadium iron 10-20%, titanium iron 5-15%, boron iron 0.3% -0.7%, the balan...

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Abstract

The invention belongs to the technical field of high manganese steel smelting process in iron and steel metallurgy, in particular relates to a novel process for producing a super high manganese steel casting. The novel process comprises an electric arc furnace smelting process, a steel casting process and a heat treatment process. An oxidation method used in the smelting process comprises the following steps of: blowing oxygen to support smelting when 18 to 22% of waste steel in a furnace is melted, slagging twice, adding chromium (Cr) iron and manganese (Mn) iron, tapping after all components meet the standards, modifying molten steel and finally performing argon purification. In the steel casting process, a casting head is arranged at the thickest position of the steel casting and designed into a side casting head, preferably a heating and heat-insulating casting head, the temperature of a casting box is under control so that the temperature of the casting is below 300 DEG C, and the casting is cooled with natural air during sand removal to prevent the cracking of the casting. The heat treatment process comprises the following steps of: performing water toughening treatment and tempering at 250 DEG C instantly after quenching. By the adoption of the novel process disclosed by the invention, the quality and mechanical properties of the casting are greatly improved, the casting can be prevented from being broken in use, and the wear resistance of the casting is increased. Besides, the novel process makes full use of resource materials and increases the economic benefit.

Description

technical field [0001] The invention belongs to the technical field of high manganese steel smelting technology in iron and steel metallurgical foundry industry, and in particular relates to a new technology for producing super high manganese steel castings. Background technique [0002] At present, high-manganese steels such as Mn13 and Mn13Cr2 are widely used at home and abroad, and wear-resistant high-manganese steels such as Mn18 and Mn18Cr2 are developed later. And use conventional production technology for production. Due to the material properties of high manganese steel itself, it is easy to produce composition segregation, coarse grains and other phenomena, which seriously affect the characteristics of high manganese steel material, especially in the production of thick and large section steel castings. . It is common to see brittle fracture due to the degree of toughness reduction, and the uneven composition leads to local non-wear resistance, which is difficult ...

Claims

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Application Information

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IPC IPC(8): C21C5/52C21C5/54C21C7/04C21C7/072B22C9/08C21D6/00C21D1/18
CPCY02P10/20
Inventor 韩建国
Owner ANSTEEL GRP MINING CO LTD
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