COMPOSITE CAM SHEET FROM POWDER METALLURGY AND PREPARATION METHOD THEREFOR

摘要

A composite cam sheet from powder metallurgy (1), wherein a cam of powder metallurgy (12) is composited on the surface of a matrix (11). The preparation method for the composite cam sheet from powder metallurgy comprises sinter-welding, soldering, welding with argon arcs, laser welding, and hot pressing, etc. The composite cam sheet from powder metallurgy has a stable size, good impact toughness, and good wear-resistance, is low cost, and can replace the integral cam sheets currently made by the processes of forging, drawing, and powder metallurgy, etc. The cam sheet is suitable for the preparation of a hollow camshaft by processes such as mechanical fitting, hydraulic shaping, and welding, and satisfies the usage requirements for a fitting-type camshaft.