Laser cladding surface reinforcing method for tamping pickaxe head

Abstract

The invention provides a laser cladding surface reinforcing method for a tamping pickaxe head. The laser cladding surface reinforcing method is used for solving the technical problem that in the priorart, a tamping pickaxe head is prone to being abraded, fractured and damaged, and comprises the steps of material preparation, pretreatment and laser cladding. By implementing the technical scheme, laser cladding of reinforcing alloy powder is conducted on a pickaxe head reinforcing area, and thus the fatigue fracture resisting ability and abrasion resistance of the pickaxe head can be improved;and laser melting and consolidation treatment is conducted on the pickaxe head in the pretreatment process, the metallurgical bonding strength of the surface of the pickaxe head and a cladding layer can be improved, the service life of the pickaxe head is prolonged, and the time cost and labor cost for pickaxe head maintenance are lowered.

Description

technical field [0001] The invention relates to the field of laser cladding railway maintenance, in particular to a laser cladding surface strengthening method for tamping picks. Background technique [0002] Railway tamping machine is a professional equipment used for tamping ballast under sleepers. It has the characteristics of light weight, reliable performance, firmness and durability, and flexible and convenient use. It is an indispensable tool in railway line construction and maintenance operations. Since the ballast bed is a granular structure, the force acting on the tamping pick is very complicated, not only alternating stress, but also impact wear and sliding abrasive wear, resulting in severe wear and fatigue fracture failure of the tamping pick head, which is the mainstay of railway subgrade maintenance. Vulnerable and consumable parts with the largest consumption and the worst working conditions in the process. [0003] At present, the tamping picks used in Chi...

AI Technical Summary

Problems solved by technology

Since the ballast bed is a granular structure, the force acting on the tamping pick is very complicated, not only alternating stress, but also impact wear and sliding abrasive wear, resulting in severe wear and fatigue fracture failure of the tamping pick head, which is the mainstay of railway subgrade maintenance. Vulnerable and consumable parts with the largest consumption and the worst working conditions in the process

[0003] At present, the tamping picks used in China are mainly low-alloy casting tamping picks with wear-resistant alloy surfacing and integral casting heat treatment strengthening picks, but both have problems such as large wear and high scrap rate, which greatly increase construction costs and Extend the construction period; forged tamping picks made of wear-resistant alloys imported from abroad have strong wear resistance, high strength, good toughness, and good performance, and can be repaired according to wear and tear, but the price is too expensive

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