Powder metallurgy cobalt-based articles having high resistance to wear and corrosion in semi-solid metals

摘要

A powder, fully dense metal cobalt-base article having been hot isostatically pressed and heat treated, said article having high wear and corrosion resistance to semi-solid metal and being characterized by: C in an amount of 0.6 to less than 1%; W in an amount of 3 to 5%; Cr in an amount of 25 to 30%; Co in an amount principally comprising the balance of said article; and said article having a hardness of greater than 42HRC, a bend fracture strength of greater than 330 ksi and substantial dimensional and mechanical property stability during exposure to temperatures in range of about 316! to 816!C.