Hardening treatment process of elevator traction wheel

Abstract

The invention discloses a hardening treatment process of an elevator traction wheel. The process comprises the following overall steps: fixing the traction wheel on a rotating workbench; setting a quenching parameter, performing laser hardening treatment on the periphery of the surface of a rope groove by a laser head; rapidly exchanging heat with the high-temperature surface by depending on the non-heated core part of the traction wheel to realize self-quenching of the surface of the rope groove; manufacturing a metallographic phase sample block of the traction wheel, detecting the effectivehardness and depth of a Martensitic quench-hardened layer and judging whether the metallographic phase tissue of the traction wheel meets the standard requirement or not; if the hardness and the depthdo not accord with the preset values, adjusting the related parameters of laser quenching processing; and after adjusting, detecting again until the effective hardening layer meets all the standard requirements. By adoption of the laser surface hardening treatment process, the hardness of the surface of the traction wheel can be remarkably improved; meanwhile, the tissue and the toughness of thecore part of a matrix are not damaged, and the process is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to a treatment process, in particular to a hardening treatment process for elevator traction sheaves. Background technique [0002] The traction sheave is the sheave on the traction machine, and the elevator can transmit traction power through the friction between the wire rope and the groove surface of the traction sheave. During the operation of the elevator, since the traction sheave bears all the dynamic and static loads of the car, load, counterweight, etc., the traction sheave is required to have high strength, toughness, wear resistance and impact resistance. However, at present, most of the traction wheels produced by major elevator manufacturers have not been quenched, so they are not resistant to wear. People generally extend the service life of the products by increasing the size of the traction wheels. However, when the size of the traction sheave becomes larger, the size of the traction machine will increase accordin...

AI Technical Summary

Problems solved by technology

However, at present, most of the traction wheels produced by major elevator manufacturers have not been quenched, so they are not resistant to wear. People generally extend the service life of the products by increasing the size of the traction wheels.

However, when the size of the traction sheave becomes larger, the size of the traction machine will increase accordingly, and the diameter of the supporting wire rope will also become thicker, which will easily lead to the problem of broken strands and broken wires of the wire rope due to excessive brittleness, and not It is beneficial to reduce the production and maintenance costs of the traction machine, and affects the safety of the product

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