Laser cladding repair process for cross shafts

Abstract

The invention relates to a laser cladding repair process for cross shafts. The process comprises the following steps of: A. carrying out treatment on the surface of the cross shaft, and carrying out failure analysis; B. carrying out 80-150 DEG C overall preheating on the cross shaft; C. according to failure analysis results of the cross shaft, optimizing process parameters, and carrying out laser cladding, wherein adopted alloy powder comprises the following components in percentage by weight: less than or equal to 0.1% of C, 10-13% of Cr, 1.5-2.5% of B, 1-2% of Si, 0.5-1.2% of Mo, 8-12% of Mn, 6-12% of W, 5-15% of TiO2, and the balance of Fe; and D. carrying out detection. According to the laser cladding repair process for the cross shafts, disclosed by the invention, through carrying out the laser cladding on the surface of the cross shaft, the size of the cross shaft can meet the application requirements, and the hardness and the wear resistance of the cross shaft subjected to repair exceed the original hardness and the original wear resistance of the cross shaft.

Description

technical field [0001] The invention relates to a laser cladding method, in particular to a laser cladding repair method of a cross axis. Background technique [0002] The cross shaft is a transmission component that connects four directions of rotation. It is used in the transmission connection structure of large machinery. The manufacturing process is complicated, the cost is high, and the construction period is long. Due to the particularity of its parts, the cross shaft is required to achieve high mechanical properties with soft inside and rigid outside. Medium and low carbon steel or alloy steel with good toughness is selected as the base material. While ensuring the toughness of the central part, the outer circular surface of the connecting bearing is required to achieve high hardness and wear resistance, so the surface of this part should be carburized Quenching to improve surface hardness, strength and wear resistance. The working environment of the cross shaft is ...

AI Technical Summary

Problems solved by technology

The use environment of the cross shaft is harsh, and it has been in the wear-resistant and torsion-resistant environment of the four-axis rotation for a long time. The bearing block will produce dimensional wear and fatigue layer peeling during use, resulting in component failure.

When repairing the cross shaft, due to the high carbon content and high hardness on the surface of the parts, the physical combination of spraying and spray welding is prone to peeling off, and arc welding will cause large deformation and hardness due to large heat input and welding stress. Low, easy to crack and other defects