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Iron-based alloy powders and sintered forged components for powder metallurgy

An iron-based alloy and powder metallurgy technology, which is applied in transportation and packaging, metal processing equipment, coating, etc., can solve the problems of easy wear of forming dies and reduced service life of forming dies, and achieve the effect of uniform distribution of Cu

Active Publication Date: 2019-05-07
JFE STEEL CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, molding of the above-mentioned iron-based alloy powder requires a high compression force, so there is a problem that the molding die is easily worn and the life of the molding die is reduced.

Method used

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  • Iron-based alloy powders and sintered forged components for powder metallurgy

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Experimental program
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Embodiment

[0064] ·Manufacture of iron-based alloy powder

[0065] As shown in Table 1, the molten steel to which 1.0 to 6.0% by mass of Cu was added was produced into Cu prealloyed raw material iron powder by using the water atomization method. It should be noted that some of the raw material iron powders were not prealloyed with Cu. In addition, the impurity contents of the raw iron powder are all Si≤0.05% by mass, Mn≤0.15% by mass, P≤0.025% by mass and S≤0.025% by mass.

[0066] Next, electrolytic copper powder with an average particle size of 25 μm is added to the raw iron powder pre-alloyed with Cu and the raw iron powder without Cu pre-alloyed as a Cu source for diffusion adhesion, and mixed using a V-type mixer 15 minutes. It should be noted that such addition of Cu was not performed under some conditions. As the Cu source for diffusion and adhesion, atomized copper powder (No.4A) with an average particle size of 15 μm, atomized copper powder (No.15) with an average particle si...

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Abstract

An iron-based alloy powder for powder metallurgy obtained in the following manner: it contains 2.0-5.0% by mass of Cu, the remainder is composed of Fe and unavoidable impurities, and 1 / 10-8 / 10 of the amount of Cu is in the form of powder Diffusion adheres to the surface of the iron powder as the raw material of the iron-based alloy powder, and the remaining Cu is contained in the above-mentioned iron powder in the form of pre-alloying; It is excellent in specific compressibility, and can produce high-strength sintered forged parts even when sintered at a low temperature, compared with the conventional iron-based alloy powder mixed with Cu powder.

Description

technical field [0001] The present invention relates to iron-based alloy powder as a raw material powder of powder metallurgy products, and a sintered forged part manufactured by using the iron-based alloy powder as a raw material by a sintered forging method. Background technique [0002] Among powder metallurgy products, sintered forged products are used in parts that require high strength, such as connecting rods of automobile engines. [0003] As raw material powder for sintered forged products, Fe—Cu—C-based iron-based alloy powder obtained by mixing Cu powder and graphite powder with pure iron powder is often used (Patent Documents 1 to 4). In addition, a machinability improving agent such as MnS for improving machinability may be further added to the raw material powder (Patent Documents 1, 4, and 5). [0004] Here, in recent years, in the applications for connecting rods, the miniaturization and performance enhancement of engines are progressing, and further high-st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/17C22C33/02C22C38/00C22C38/16B22F1/10B22F1/14B22F1/17
CPCB22F3/17C22C38/00C22C38/16C22C33/0207C22C33/0257B22F1/17B22F1/10B22F1/00B22F1/14C22C33/02B22F2301/35B22F2301/10B22F2003/175C22C33/0264
Inventor 中村尚道园部秋夫小林聪雄
Owner JFE STEEL CORP
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