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Prealloyed metal powder, process for obtaining it, and cutting tools produced with it

A metal powder, pre-alloying technology, applied in the field of pre-alloying metal powder, can solve problems such as expensive

Active Publication Date: 2011-08-03
优美科特种粉末法国公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such kilns are expensive to purchase and maintain
[0008] Therefore, in any case, these methods are very expensive in terms of both raw material and preparation process

Method used

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  • Prealloyed metal powder, process for obtaining it, and cutting tools produced with it
  • Prealloyed metal powder, process for obtaining it, and cutting tools produced with it
  • Prealloyed metal powder, process for obtaining it, and cutting tools produced with it

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Embodiment Construction

[0042] The invention will be better understood by reading the following description.

[0043] The prealloyed powders according to the invention must in particular meet the following requirements.

[0044] The relative density of the green part obtained from this powder must be at least 60% for a maximum cold pressure of 700 MPa.

[0045] Preferably, the powder must be readily granulated in a particle size range of 63-450 μm, which is most suitable for filling cold-pressed steel molds for making diamond wire saw beads.

[0046] After free sintering at 850-1100° C. in a conveyor kiln (for continuous production) or in a static kiln (for batch production), preferably the relative density of the obtained part must be at least 97%.

[0047] It must be possible to use this powder to produce parts with a hardness of at least 220HB after sintering, so that they can be used to cut granite.

[0048] It has been found that these and the above objects are achieved according to the invent...

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Abstract

Prealloyed metal powder, especially for the manufacture of cutting tools by sintering, characterized in that its composition, in percentages by weight, is: 48 - 52% Fe; 14 - 19% Co; 32 - 37% Cu; <= 1 % O, the balance being impurities resulting from its manufacture. Process for obtaining this powder and diamond saws and cutting wires produced with this powder.

Description

technical field [0001] The present invention relates to the field of prealloyed metal powders from which diamond cutting tools such as segments for saws and beads for making wire saws (fil) for cutting hard materials such as granite are made ( perle). Background technique [0002] Metal powders used to make diamond beads are typically prepared from fines containing about 20% tungsten carbide and about 80% cobalt. The granules are mixed with diamond and pressed into rings, and the green part is sintered according to two possible methods. [0003] In the first case, graphite molds are filled with each green part equipped with a steel sleeve and then sintered under the pressure of a conventional hot press. However, due to the special form of the diamond beads: [0004] - Graphite molds have complex geometries and are expensive to purchase, not least because they have to be replaced periodically; [0005] - Since it is difficult to fill the mold with green parts and rings, f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/02
CPCB22F2998/10C22C33/0285C22C33/0214C22C38/10B22F2005/001C22C38/16B22F1/00B22F3/02B22F3/10C22C33/02B22F3/12
Inventor M·默尔特尼S·玛康H·瑟尼尔罗B·玛里图
Owner 优美科特种粉末法国公司