Mixed powder for powder metallurgy

Details Mixed powder for powder metallurgy Mixed powder for powder metallurgy

B - Operations, Transporting

22

F

B22F 1/00 (2006.01) C22C 38/00 (2006.01) C22C 38/16 (2006.01)

Patent

CA 2528698

Disclosed is a mixed powder for powder metallurgy which is obtained by diffusing and adhering 0.05-1.0 mass% of Mo over the surface of an iron base powder which contains, as a prealloy, not more than 0.5 mass% of Mn and 0.2- 1.5 mass% of Mo, thereby forming an alloy steel powder, and then blending 0.2- 5 mass% of an Ni powder and/or 0.2-3 mass% of a Cu powder into the thus-formed alloy steel powder. A dense sintered body having excellent tensile strength and bending fatigue strength can be produced from such a mixed powder.

Ici divulguée est une poudre mélangée pour métallurgie des poudres qui est obtenue en diffusant et faisant adhérer 0,05-1,0 % masse de molybdène sur la surface d~une poudre à base de fer qui contient, en tant que préalliage, pas plus de 0,5 %masse de manganèse et 0,2-1,5 %masse de molybdène formant ainsi une poudre d~alliage d~acier et en mélangeant ensuite 0,2-5 %masse de poudre de nickel et/ou 0,2-3 masse% de poudre de cuivre dans la poudre d~alliage d~acier déjà formée. Un corps fritté et dense ayant une excellente résistance à la rupture et une résistance à la fatigue par flexion tel qu~une poudre frittée.

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