High-strength cast steel and manufacturing method thereof

A manufacturing method and high-strength technology, applied to the improvement of process efficiency, electric furnace, furnace, etc., can solve the problems of increased maintenance costs, high wear rate, frequent replacement, etc.

Inactive Publication Date: 2020-03-31
泉州市恒通机械配件有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the steel used for the production of auto parts is ordinary low-medium content alloy steel, because these auto metal parts are generally frequent moving parts in terms of function, with high wear rate and frequent replacement, which increases maintenance costs; found It is very important to improve the hardness and wear resistance, and at the same time, the low-medium content alloy steel has high heat resistance on the surface of parts.

Method used

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  • High-strength cast steel and manufacturing method thereof
  • High-strength cast steel and manufacturing method thereof

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the examples, and the mode of the present invention includes but not limited to the following examples.

[0019] A high-strength cast steel, which contains chemical elements and their mass percentages: carbon 0.35-0.40%, silicon 0.35-0.6%, manganese 1.2-1.4%, chromium 0.4-0.6%, phosphorus ≤ 0.035%, sulfur ≤ 0.035%, aluminum 0.03-0.08%, titanium 0.02-0.06%.

[0020] The manufacturing method of described high-strength cast steel comprises the following steps:

[0021] (1) Throw steel scrap, ferromanganese, aluminum wire, pig iron, ferrochrome, and ferrotitanium into an intermediate frequency electric furnace for smelting at a melting temperature of 1600-1650°C, and the smelting molten steel reaches 80-90% of the furnace capacity;

[0022] (2) Molten steel slag removal: remove slag from the molten steel in step (1), the amount of slag removal agent used is 0.1% to 0.3% of the weight of the molten st...

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Abstract

The invention discloses high-strength cast steel which comprises 0.35%-0.40% of carbon, 0.35%-0.6% of silicon, 1.2%-1.4% of manganese, 0.4%-0.6% of chromium, no more than 0.035% of phosphorus, no morethan 0.035% of sulfur, 0.03%-0.08% of aluminum and 0.02%-0.06% of titanium by mass. Aluminum, chromium and titanium alloy elements are added into the cast steel material, so that the steel has high strength, toughness and mechanical property; and the production process disclosed by the invention has the advantages of unique heat treatment process, high production efficiency, energy conservation,environmental protection, economic benefit and popularization value, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to an alloy steel and a manufacturing method thereof, in particular to a manufacturing method of ultra-high-strength cast steel. Background technique [0002] The metal supporting parts of automobiles not only have high requirements on structural strength and function, but also are equally important in mechanical processing. Such requirements not only meet the basic conditions for automobile use, but also guarantee the safety and reliability of extending the service life. [0003] In the prior art, the steel used for the production of auto parts is ordinary low-medium content alloy steel, because these auto metal parts are generally frequent moving parts in terms of function, with high wear rate and frequent replacement, which increases maintenance costs; found It is very important to improve the hardness and wear resistance, and at the same time, the low-medium content alloy steel with high heat resistance on the part surface. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/28C22C38/06C22C33/06C21C5/52C21C7/06
CPCC21C5/52C21C7/06C22C33/06C22C38/002C22C38/02C22C38/04C22C38/06C22C38/28Y02P10/20
Inventor 杨元恭蒋孝军
Owner 泉州市恒通机械配件有限公司
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