A kind of preparation method of high-strength, high-hardness water-atomized pre-alloyed steel powder

A technology of alloy steel powder and high hardness, which is applied in the field of preparation of high-strength, high-hardness water atomized pre-alloyed steel powder, which can solve the problems such as the degradation of matrix material performance, achieve performance improvement, overcome high hydrogen loss, and improve application performance Good results

Active Publication Date: 2021-12-03
山东鲁银新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] (2) Provide a method for preparing high-strength, high-hardness water-atomized pre-alloyed steel powder, which overcomes the problem that the performance of the matrix material decreases after the powder is sintered and hardened by adding too much chromium and manganese to improve the hardenability;

Method used

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  • A kind of preparation method of high-strength, high-hardness water-atomized pre-alloyed steel powder
  • A kind of preparation method of high-strength, high-hardness water-atomized pre-alloyed steel powder
  • A kind of preparation method of high-strength, high-hardness water-atomized pre-alloyed steel powder

Examples

Experimental program
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Effect test

Embodiment 1

[0057] A method for preparing high-strength, high-hardness water-atomized pre-alloyed steel powder, including batching, smelting process, atomization, reduction, and post-treatment.

[0058] 1. Ingredients

[0059] The composition content meets the following requirements: Mn<0.50%, P<0.04%, Si<0.2%, S<0.04%, Cr+Ni+Cu+Mo≤0.20% of high-quality ordinary carbon steel scrap and pig iron as raw materials, spare.

[0060] The weight ratio of the high-quality common carbon steel scrap: pig iron is 1:2.

[0061] 2. Smelting process

[0062] The smelting process includes EBT electric furnace smelting, electric furnace tapping, and LF refining furnace smelting.

[0063] The EBT electric furnace is smelted, and the smelting temperature is 1550°C.

[0064] When the EBT electric furnace is smelted and the electric furnace is tapping, the carbon content at the control end point is ≥0.15%.

[0065] The EBT electric furnace smelting, when the composition of the electric furnace molten stee...

Embodiment 2

[0094] A method for preparing high-strength, high-hardness water-atomized pre-alloyed steel powder, including batching, smelting process, atomization, reduction, and post-treatment.

[0095] 1. Ingredients

[0096] The composition content meets the following requirements: Mn<0.50%, P<0.04%, Si<0.2%, S<0.04%, Cr+Ni+Cu+Mo≤0.20% of high-quality ordinary carbon steel scrap and pig iron as raw materials, spare.

[0097] The weight ratio of high-quality common carbon steel scrap: pig iron is 1:1.

[0098] 2. Smelting process

[0099] The smelting process includes EBT electric furnace smelting, electric furnace tapping, and LF refining furnace smelting.

[0100] The EBT electric furnace is smelted, and the smelting temperature is 1550°C.

[0101] When the EBT electric furnace is smelted and the electric furnace is tapping, the carbon content at the control end point is ≥0.15%.

[0102] The EBT electric furnace smelting, when the composition of the electric furnace molten steel me...

Embodiment 3

[0131] A method for preparing high-strength, high-hardness water-atomized pre-alloyed steel powder, including batching, smelting process, atomization, reduction, and post-treatment.

[0132] 1. Ingredients

[0133] The composition content meets the following requirements: Mn<0.50%, P<0.04%, Si<0.2%, S<0.04%, Cr+Ni+Cu+Mo≤0.20% of high-quality ordinary carbon steel scrap and pig iron as raw materials, spare.

[0134] The weight ratio of the high-quality common carbon steel scrap: pig iron is 1:2.

[0135] 2. Smelting process

[0136] The smelting process includes EBT electric furnace smelting, electric furnace tapping, and LF refining furnace smelting.

[0137] The EBT electric furnace is smelted, and the smelting temperature is 1550°C.

[0138] When the EBT electric furnace is smelted and the electric furnace is tapping, the carbon content at the control end point is ≥0.15%.

[0139] The EBT electric furnace smelting, when the composition of the electric furnace molten stee...

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Abstract

The invention provides a method for preparing high-strength, high-hardness water-atomized pre-alloyed steel powder, including batching, smelting process, atomization, reduction, and post-treatment; the high-strength, high-hardness water-atomized pre-alloyed steel powder The Mn content is 0.35‑0.55%, the Ni content is 1.30‑1.55%, and the Mo content is 1.15‑1.40%. After the high-strength, high-hardness water-atomized pre-alloyed steel powder of the present invention is sintered and hardened, the average sintered hardness reaches 35.0-37.5HRC, and the average transverse fracture strength reaches 1042.6-1109.1 MPa; the compressibility of the pre-alloyed steel powder reaches 6.69 g / cm 3 , the hydrogen loss value reaches 0.14%, and the bulk density reaches 3.01 g / cm 3 .

Description

technical field [0001] The invention belongs to the field of pre-alloyed steel powder, and in particular relates to a preparation method of high-strength and high-hardness water atomized pre-alloyed steel powder. Background technique [0002] my country's iron-based powder metallurgy products have a broad space for development. Taking the automobile industry as an example, my country produces more than 20 million vehicles annually. The amount of iron-based powder metallurgy parts used in each car in developed countries such as the United States and the United States has reached 14-19.5Kg. If 9Kg of iron-based powder metallurgy parts are added to each car in my country, the demand for steel powder and iron-based powder metallurgy parts will increase by at least 180,000 tons per year. Therefore, improving the preparation level of China's iron and steel powder and iron-based powder metallurgy parts is of great significance to the development of my country's iron-based powder me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08C22C38/02C22C38/04C22C38/08C22C38/12C22C33/06C21C5/52C21C7/072C21C7/06C21D3/02C21D3/04
CPCB22F9/082B22F2009/0848C21C5/52C21C7/0006C21C7/06C21C7/072C21C2007/0093C21D3/02C21D3/04C22C33/06C22C38/004C22C38/02C22C38/04C22C38/08C22C38/12Y02P10/20
Inventor 徐从京于永亮刘增林王昌东王娟张毅高慧王宁孙英庆李红刚
Owner 山东鲁银新材料科技有限公司
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