Quenching process for composite reinforced roller spline pair

Abstract

The invention relates to the technical field of surface strengthening of mechanical transmission parts, and discloses a composite strengthened roller spline pair quenching process which comprises the following steps: S1, selecting alloy steel as a matrix, and turning to form a required spline tooth form; s2, carrying out laser etching on the surface of the substrate by adopting a laser microstructuring technology; s3, the surface of the base body is coated with a metal ceramic coating through laser cladding; s4, micropore arrays are designed on the surface and the interior of the base body, friction heat is taken away through nitrogen cooling, and the temperature is monitored in real time; s5, forming a Fe3N diffusion layer on the surface of the coating through plasma nitriding; and S6, the meshing face of the spline pair is coated with a MoS2 microcapsule lubricating coating through electrostatic spraying. A metallurgical bonding interface is formed through laser cladding, and a Fe3N diffusion layer is constructed in cooperation with plasma nitriding, so that gradient transition and mechanical interlocking of interface components and tissues are achieved, and the effect of maintaining stable bonding under thermodynamic cycle and alternating load is achieved.

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