Partially Diffused Alloyed Steel Powder
A technology of alloy steel powder and pre-alloying, which is applied in metal processing equipment, transportation and packaging, coating, etc., can solve the problems of increased component manufacturing cost and inability to reduce the total cost, and achieve the effect of low cost and excellent fluidity
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Embodiment 1
[0087] Iron-based powder as a raw material and Mo raw material powder are mixed, followed by heat treatment, whereby Mo-based partial diffusion alloyed steel powder is produced.
[0088] As the above iron-based powder, atomized iron powder is used. The above-mentioned atomized iron powder is a so-called as-atomized powder (as-atomized powder) produced by an atomization method and not subjected to heat treatment, and is a powder (pure iron powder) composed of Fe and unavoidable impurities. The above-mentioned iron-based powder does not contain Ni, Cr, and Si other than unavoidable impurities, and therefore, the contents of Ni, Cr, and Si are each 0.1% by mass or less.
[0089] Table 1 shows the number frequency of particles having a particle diameter of 20 μm or less contained in the pure iron powder used. The above number frequency was measured by image analysis using Morphologi G3 manufactured by Malvern Corporation.
[0090] In addition, as the above-mentioned Mo raw mater...
Embodiment 2
[0099] In place of the above-mentioned pure iron powder, an iron-based powder (pre-alloyed steel powder) containing one or more elements selected from Cu, Mo, and Mn and the remainder consisting of Fe and unavoidable impurities is used, except , Partial diffusion alloyed steel powder was produced under the same conditions as in Example 1. The above-mentioned iron-based powder is an atomized iron-based powder produced by an atomization method. Table 2 shows the contents of Cu, Mo and Mn in the iron-based powder used.
[0100] Table 2 collectively describes the number frequency of particles having a particle size of 20 μm or less contained in the iron-based powder used. The said number frequency was measured by the same method as Example 1.
[0101] The above-mentioned Mo oxide powder was added to the above-mentioned iron-based powder so that the Mo content in the finally obtained partial diffusion alloyed steel powder was the value shown in Table 2, and the above-mentioned Mo...
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