F - Mech Eng,Light,Heat,Weapons – 16 – C
Patent
F - Mech Eng,Light,Heat,Weapons
16
C
75/167, 308/18,
F16C 33/12 (2006.01) B22F 3/11 (2006.01) B22F 5/10 (2006.01) F16C 23/04 (2006.01)
Patent
CA 1045194
Abstract of Disclosure Low-cost articles characterized by a surface of revolution, such as truncated spherical balls, e.g., plain spherical bearing balls, are provided made by the powder metal compaction and sintering of blanks followed, in the case of ball elements, by densification of the outer spherical surface by mechanical working, such as by roll-forming, the balls so produced being character- ized by improved sphereicity and dimensional tolerance and improved wear resistance combined with optimum re- sistance to corrosion. The spherical surface of the ball is substantially free of pores, has a work hardened struc- ture and has a density at and adjacent the surface of at least about 95% of the theoretical density of the metal, the density substantially below the surface co being less and ranging to as low as at least about 70% of theoreti- cal density.
233222
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