METHOD OF PRODUCING BIMETAL SINTERED WEAR-RESISTANT ARTICLES Russian patent published in 2010 - IPC B22F7/04 C22C33/02 

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly to production of bimetal articles on the basis of high wear-resistance iron-base surface layer. Bimetal article is pressed that comprises casing made from iron powder and surface layer mix prepared by mixing in wt %: 60 - iron powder and 40 - mix of powders of born carbide and ferrochromium in relation of 1:1 or 1:1.5, or by mixing 82-85 of ion powder and 15-18 of chromium carbide powder. Sintering is performed in two stages: first, pressed article is sintered in chamber furnace at 1150-1200 °C for 100-200 min in protective atmosphere, then high-temperature sintering is performed for surface layer by frequency current at 1300-1400 °C for 10-40 s to depth of 3-4 mm. After sintering, the article is subjected to hardening in fluid medium.

EFFECT: article with high wear resistance, higher efficiency of process.

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