METHOD FOR PROCESSING STEEL PART AND STEEL PART Russian patent published in 2023 - IPC C21D1/10 C21D1/78 C23C8/26 C23C8/50 C23C8/56 

FIELD: steel parts.

SUBSTANCE: invention relates to a method for processing a part (P) made of steel and a part made of steel. The method includes a nitriding operation with the formation on the part (P) of a combined layer (2) with a thickness of 5 to 30 mcm and a diffusion area (3) with a thickness of 100 to 500 mcm located under the combined layer (2) and in contact with it, and the operation hardening the part (P) using high-frequency induction at an induction depth that is greater than or equal to 0.5 mm, thereby strengthening the part (P) and giving said part (P) a surface hardness that is greater than or equal to 50 HRC, the hardness of the combined layer (2), which is greater than or equal to 400 HV0.05, the hardness of the workpiece, which is greater than or equal to 500 HV0.05 at a depth of 500 mcm, wherein the high-frequency induction hardening operation is performed without applying a protective film to the workpiece (P) before the induction hardening operation and wherein the operation of hardening the part using high-frequency induction is performed so that the ferrite is retained in the part (P) between the interface of the diffusion region (3)/combined layer (2) and at a depth of 500 mcm. The nitrided part (P), made of steel, contains a combined layer (2) with a thickness of 5 to 30 mcm and a diffusion region (3) with a thickness of 100 to 500 mcm, located under the combined layer (2) and in contact with it, while said part (P) has a surface hardness that is greater than or equal to 50 HRC, a hardness of the combined layer (2) that is greater than or equal to 400 HV0.05, a part hardness that is greater than or equal to 500 HV0.05 at a depth of 500 mcm, wherein said part (P) contains ferrite and martensite between the diffusion region (3)/combined layer (2) interface and at a depth of 500 mcm.

EFFECT: significant resistance to abrasive and adhesive wear, improved frictional properties, improved resistance to scale formation and good corrosion resistance.

15 cl, 13 dwg, 1 tbl