Narrow-hardenability industrial gear steel and production method thereof

A production method and hardenability technology, applied in the direction of manufacturing converters, etc., can solve the problems of the large bandwidth of the gear steel, the gear steel does not meet the requirements of users, and achieve the effect of improving the strength and reducing the toughness.

Inactive Publication Date: 2020-02-28
石钢京诚装备技术有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing composition of gear steel has a large belt,

Method used

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  • Narrow-hardenability industrial gear steel and production method thereof
  • Narrow-hardenability industrial gear steel and production method thereof
  • Narrow-hardenability industrial gear steel and production method thereof

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Embodiment Construction

[0027] A narrow hardenability industrial gear steel, the mass percentage of each chemical composition of the steel plate is as follows: C: 0.15%-0.19%; Si: 0.22%-0.30%; Mn: 0.55%-0.75%; Cr: 1.65%-1.85 %; Mo: 0.25%-0.35%; Ni: 1.40-1.70%; S≤0.005%; P≤0.015%; Cu: 0.05%-0.15; N: 100-160PPM, the balance being Fe and unavoidable impurities.

[0028] A production method of narrow hardenability industrial gear steel, including smelting and continuous casting steps, converter tapping conditions C≥0.06%, P≤0.010%, tapping temperature 1620-1650℃;

[0029] Add 200-300kg of core aluminum during the tapping process, add alloy, 600-1000kg white ash, 500-800kg pre-melting slag after adding aluminum; 120-180m aluminum wire after tapping the furnace;

[0030] Refining silicon carbide powder 100~400kg and 30-60kg aluminum particles are used for diffusion deoxidation, maintaining the reducing atmosphere in the furnace, white slag retention time ≥ 35 minutes; VD high vacuum (below 67Pa) retention time ≥ ...

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Abstract

The invention relates to narrow-hardenability industrial gear steel. A steel plate comprises the following chemical components of, by weight percentage, 0.15% to 0.19% of C, 0.22%-0.30% of Si, 0.55%-0.75% of Mn, 1.65%-1.85% of Cr, 0.25%-0.35% of Mo, 1.40%-1.70% of Ni, S<=0.005%, P<=0.015%, 0.05%-0.15% of Cu, 100-160 ppm of N, the balance being Fe and unavoidable impurities. The invention further relates to a production method of the high-end narrow-hardenability industrial gear steel. The production method comprises the steps of converter tapping, refining, VD high vacuum, casting and continuous casting. The narrow-hardenability industrial gear steel and the production method meet city rail and high-speed rail speed reducer gear steel end quenching performance requirements.

Description

Technical field [0001] The invention relates to the technical field of iron and steel, in particular to a narrow hardenability industrial gear steel and a production method thereof. Background technique [0002] With the rapid development of urban railways and high-speed railways, more stringent conditions have been put forward for the use of gear steel in industrial reducers. Gearbox is the key equipment of high-speed train power transmission. It is one of the ten supporting technologies of high-speed EMUs and one of the most important transmission links in the transmission system of EMUs. It has high requirements for accuracy and reliability and is difficult to design and manufacture. , It has a lot to do with driving safety. [0003] Whether the end hardenability is stable or not has a great influence on the heat treatment deformation of gear steel. The narrower the width of the hardening belt, the smaller the dispersion, which is more conducive to gear processing and improvin...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44B22D11/16C21C5/30C21C7/00C21C7/06C21C7/10C22C33/04
CPCB22D11/16C21C5/30C21C7/0006C21C7/06C21C7/10C22C33/04C22C38/001C22C38/02C22C38/04C22C38/42C22C38/44
Inventor 张玉亭李林
Owner 石钢京诚装备技术有限公司
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