Metal powders, composites, granulated powders and sintered bodies for powder metallurgy
A technology of metal powder and powder metallurgy, which is applied in the fields of metal powder for powder metallurgy, granulated powder, sintered body, and composites, and can solve problems such as increased workload and high cost
Active Publication Date: 2020-04-28
SEIKO EPSON CORP
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
At this time, although the density can be increased by further performing additional processing such as hot isostatic pressing (HIP processing) on the sintered body, the workload is significantly increased and high costs are unavoidable.
Method used
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Embodiment
[0230] Next, examples of the present invention will be described.
[0231] 1. Manufacture of sintered body (Zr-Nb system)
[0232] (Sample No.1)
[0233] 1. First, metal powders having the compositions shown in Table 1 produced by the water atomization method were prepared. In addition, the average particle diameter of the metal powder was 4.12 μm, and the tap density was 4.15 g / cm 3 , the specific surface area is 0.21m 2 / g.
[0234] In addition, the compositions of the powders shown in Table 1 were identified and quantified by inductively coupled plasma atomic emission spectrometry (ICP analysis). In addition, in the ICP analysis, an ICP device (CIROS120 type) manufactured by Rigaku (KK) was used. In addition, the identification and quantification of C used a carbon / sulfur analyzer (CS-200) manufactured by LECO Corporation. In addition, an oxygen / nitrogen analyzer (TC-300 / EF-300) manufactured by LECO Corporation was used for the identification and quantification of O. ...
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Abstract
It relates to metal powders, composites, granulated powders and sintered bodies for powder metallurgy. Metal powder for powder metallurgy, Fe as the main component; Cr in a proportion of 15% by mass to 26% by mass; Ni in a proportion of 7% by mass to 22% by mass; Si in a proportion of 0.3% by mass to 1.2% by mass; 0.005% by mass and 0.3 Mass % or less ratio C; one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf and Ta as the first element, and the group in the periodic table selected from the group is greater than When an element of the first element, or an element selected from the group in the periodic table of the same group as the first element and having a period in the periodic table greater than that of the first element is used as the second element, it contains 0.01 mass % or more and 0.5 mass % % or less of the first element, and 0.01 mass% or more and 0.5 mass% or less of the second element. Has an austenitic crystal structure.
Description
technical field [0001] The invention relates to metal powder, compound, granulated powder and sintered body for powder metallurgy. Background technique [0002] In powder metallurgy, a composition containing metal powder and a binder is molded into a desired shape to obtain a molded body, and then the molded body is degreased and sintered to produce a sintered body. During the production process of such a sintered body, atomic diffusion occurs between particles of the metal powder, whereby the compact is gradually densified and sintered. [0003] For example, Patent Document 1 proposes a metal powder for powder metallurgy that contains Zr and Si, and the remainder is composed of at least one selected from the group consisting of Fe, Co, and Ni and unavoidable elements. According to such a metal powder for powder metallurgy, sinterability is improved by the action of Zr, and a high-density sintered compact can be easily produced. [0004] In addition, for example, Patent Do...
Claims
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IPC IPC(8): B22F1/00B22F3/10C22C38/50C22C38/46C22C38/48C22C38/56C22C38/02C22C30/00B22F1/10
CPCB22F3/10C22C30/00C22C38/002C22C38/005C22C38/02C22C38/46C22C38/48C22C38/50C22C38/56B22F1/00B22F1/10B22F2998/10B22F3/02B22F3/1021B22F3/15C22C33/0285C22C38/44C22C38/12C22C38/04B22F9/04B22F5/00B22F2301/35
Inventor 田村贵之中村英文
Owner SEIKO EPSON CORP