Hardened steel components and process of treating the same

Details Hardened steel components and process of treating the same Hardened steel components and process of treating the same

2006-01-03

2006-01-03

Turner, Archene (Department: 1775)

Stock material or miscellaneous articles

Composite

Of metal

C148S206000, C148S210000, C148S212000, C148S214000, C148S217000, C148S225000, C148S230000, C148S232000, C148S233000, C148S316000, C148S317000, C148S318000, C148S319000, C428S216000, C428S332000, C428S336000, C428S469000, C428S698000

Reexamination Certificate

active

06982120

ABSTRACT:
The invention relates to components made of steel, more particularly outer joint parts and inner joint parts of constant velocity joints, and to a process of heat treating such components made of steel. The heat treatment operation includes the process stages of nitriding, induction surface layer hardening and tempering, which processes follow one another. As a result of the nitriding operation, the joint parts are provided with a surface layer (15) including nitrides and a diffusion layer (18) positioned thereunderneath. The subsequent induction hardening process causes the diffusion layer (18) to be hardened, so that it comprises good supporting characteristics for supporting the surface layer (15) positioned above same.

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