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Iron-based low-alloy-steel powder for powder metallurgy and preparation method of iron-based low-alloy-steel powder

A low-alloy steel and powder metallurgy technology, applied in the field of iron-based metallurgical powder and its preparation, can solve the problems of mold wear and high alloy content, and achieve the effects of avoiding wear, small particle size range, and low content

Inactive Publication Date: 2013-03-06
CANAJON ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007]The purpose of the present invention is to overcome the fact that the alloy content in the existing low-alloy steel powder for powder metallurgy is still high and the added powder has wear on the mold, and the It can provide sufficient diffusivity and other deficiencies during the sintering process of parts, and provides an iron-based low-alloy steel powder for powder metallurgy and its preparation method

Method used

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  • Iron-based low-alloy-steel powder for powder metallurgy and preparation method of iron-based low-alloy-steel powder
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Experimental program
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Effect test

Embodiment 1～15

[0025] (1) Mix powder.

[0026] Grind ferromolybdenum powder, ferrochromium powder and ferromanganese powder according to the requirements of the above alloy powder preparation process, select part or all of them, add graphite and lubricant, mix them into iron powder, and mix them to form iron-based low-alloy steel powder. The composition of the alloy powder and the percentage by weight of the alloy powder, graphite, lubricant, and matrix iron powder in the total weight are shown in the table below, where Fe is the iron in the alloy powder.

[0027]

[0028] (2) Pressing and sintering:

[0029] The various iron-based low-alloy steel powders prepared above are pressed with a certain press to form the green parts required, and then placed in a high-temperature reducing atmosphere sintering furnace (90% nitrogen, 10 hydrogen) for high-temperature sintering to form powder metallurgy parts. The mechanical properties of the prepared powder metallurgy parts are tested as shown in...

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Abstract

The invention discloses an iron-based low-alloy-steel powder for powder metallurgy and a preparation method of the iron-based low-alloy-steel powder. The iron-based low-alloy-steel powder for powder metallurgy comprises, by total weight, 0.1-0.85% of graphite, 0.5-1.2% of lubricants, 0.5-4% of alloy powder 8-12 micrometers in grain size and 95-98% of iron powder. The preparation method includes: adding the graphite, the lubricants and the alloy powder into the iron powder with uniform mixing. Compared with the prior art, the iron-based low-alloy-steel powder for powder metallurgy is less in alloy powder content and small in grain size range and has good compactibility. Besides, production cost is lowered while wear of the powder to dies is avoided during sintering of parts, and sufficient diffusivity is further provided, so that the compacted parts prepared by the iron-based low-alloy-steel powder have good mechanical property.

Description

technical field [0001] The invention relates to an iron-based metallurgical powder and a preparation method thereof, in particular to an iron-based low-alloy steel powder for powder metallurgy and a preparation method thereof. Background technique [0002] Powder metallurgy is an emerging industry that manufactures metal powder and metal powder as raw materials, and manufactures products by molding-sintering. The production of mechanical structural parts by powder metallurgy has the advantages of less cutting and no cutting, so it can save energy and materials, and has the advantages of high production efficiency. It is especially suitable for the production of products with the same shape and large quantities, which can greatly reduce production costs; The characteristics of material diversity can meet the requirements of structural parts for different purposes. [0003] At present, alloy composition design and structure control of low-alloy steel powder are hot spots in t...

Claims

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Application Information

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IPC IPC(8): B22F1/00
Inventor 王虎
Owner CANAJON ADVANCED MATERIALS CO LTD
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