C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 19/07 (2006.01) B22D 17/00 (2006.01) B22D 17/20 (2006.01) B22F 3/15 (2006.01) C22C 1/00 (2006.01) C22C 1/04 (2006.01)
Patent
CA 2269792
A fully dense powder metal cobalt-base article having high resistance to semi- solid metal wear and corrosion. The article has a constituent composition of C in an amount of about 0.65 to less than about 1 %, W in an amount of about 3 to about 5 %, Cr in an amount of about 25 to about 30 %, Co in an amount principally comprising the balance of the article. The article has a hardness of greater than 42HRC and more preferably 45HRC, a bend fracture strength of greater than 330 ksi and substantial dimensional and mechanical property stability during exposure to temperatures in range of about 1100 ~F to 1500 ~F.
L'invention concerne un article à base de cobalt intégralement constitué de poudre dense, ayant une résistance élevée à la corrosion et à l'usure de métaux semi-solides. L'article se compose d'environ 0,65 à moins d'environ 1 % de C, de 3 à environ 5 % de W, d'environ 25 à 30 % de Ce, le solde étant principalement du Co. Ledit article présente une dureté supérieure à 42HRC et, idéalement de 45HRC, une résistance à la rupture en flexion de plus de 330 ksi et une stabilité sensible des propriétés dimensionnelles et mécaniques lorsqu'il est exposé à des températures de l'ordre de 1100 ·F à 1500 ·F.
Decker Raymond F.
Pinnow Kenneth E.
Macrae & Co.
Thixomat Inc.
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