Method for preparing wear-resistant coating on surface of driving sheave race of elevator by laser cladding

Abstract

The invention relates to a method for preparing a wear-resistant coating on the surface of a driving sheave race of an elevator by laser cladding. A rendering transition layer with good toughness, which is clad on the surface of the race and forms metallurgical bonding with a base body, is rapidly scanned by laser through high-power laser; and a wear-resistant cobalt-base alloy which has good corrosive resistance and a frication coefficient in fit with that of a steel wire rope is prepared on a rendering alloy surface through laser cladding. The method is characterized by comprising the following special steps of: firstly, pre-treating the surface of the race; secondly, selecting alloy powder and an automatic powder sending device; thirdly, carrying out the laser cladding on the rendering alloy and the cobalt-base alloy powder with the frication coefficient in fit with that of the steel wire rope so that a wear-resistant coating with the thickness of 0.5-1.2 mm is formed on the surface of the race; and finally, carrying out flaw detection after cladding. The method provided by the invention has the characteristics of high productivity, lower energy consumption, small machining allowance of a cladding layer, high field, low combined cost and the like.

Description

technical field [0001] The invention relates to a wear-resistant and anti-corrosion method for the surface of conveying equipment components, in particular to a method for preparing a wear-resistant coating on the surface of an elevator traction wheel groove by adopting laser cladding technology, which belongs to the technical field of laser cladding. Background technique [0002] The elevator traction sheave is a very important part of the elevator. The main form of damage to the elevator traction sheave is wear and corrosion, and the uneven wear between the grooves often causes the failure of the entire part, which eventually leads to the scrapping of the equipment; because the elevator traction sheave has to bear the load of the car, load capacity, counterweight and other devices All dynamic and static loads require the traction sheave to have high strength, good toughness, wear resistance and impact resistance, so QT60-2 nodular cast iron is often used as the material. ...

AI Technical Summary

Problems solved by technology

However, for other specific equipment components, such as special structures such as elevator traction wheel grooves, the process parameters provided by the existing laser cladding process are obviously unable to adapt

[0014] According to the applicant's search and verification: there is no domestic precedent for using laser cladding technology to prepare wear-resistant coating on the surface of the elevator traction wheel groove, and there are no related reports abroad