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Point rail having hardened layer on working surface and its point rail working surface laser hardening treatment technology

A technology of hardening treatment and working surface, which is applied in the direction of tracks, roads, buildings, etc., can solve the problems of difficult control of heating form, thermal insulation performance, cooling medium stability, hardening treatment effect, and scientific quantification of treatment parameters, etc., to achieve hardening Ideal treatment effect, improved work efficiency, and increased service life

Inactive Publication Date: 2004-10-20
济南钢铁集团新事业有限公司
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AI Technical Summary

Problems solved by technology

[0003] The invention provides a switch rail with a hardened layer on the working face and a laser hardening treatment process on the switch rail working face, which can solve the problems in the prior art that the heating form, thermal insulation performance, and stability of the cooling medium are difficult to control and cannot be scientifically quantified Processing parameters, hardening processing effect is difficult to guarantee, and the problem of low work efficiency

Method used

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Embodiment Construction

[0008] The laser hardening treatment process of the working face of the sharp rail of the present invention: first remove the oil stains and rust on the working face of the sharp rail, dry and remove moisture, and then apply zinc phosphide paint for blackening treatment, and then pass 2 The hardening treatment equipment consisting of lasers, processing machine tools, and numerical control equipment performs laser hardening treatment on the working face of the switch rail. The hardening treatment parameters: the spot diameter is 14mm, the laser power is 1000W, and the scanning speed is 250mm / min. The depth of the hardened layer is 1mm. Can be polished. The technical parts not described in detail in the present invention are all known technologies.

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Abstract

A point rail with the hardened layer on its working surface is disclosed. A technology for hardening its working surface by laser includes such steps as removing oily dirt and rust, baking, coating zinc phosphide paint for blackening it, and using CO2 laser device to harden it. Its advantages are high effect and productivity and easy control.

Description

technical field [0001] The invention relates to the technical field of laser hardening treatment on a working face of a switch rail. Background technique [0002] The point rail is used on the railway turnout. Due to the special nature of the work, the wear degree of the working surface is relatively large. At present, in order to enhance the hardness and wear resistance of the point rail, most railway departments use conventional heat treatment methods to produce tempered martensite structure to improve the overall hardness and wear resistance of the point rail. However, it is difficult to control the heating form, thermal insulation performance, and cooling medium stability in this method, and it is impossible to scientifically quantify the processing parameters, which directly affect the effect of heat treatment, so it directly affects the hardness and wear resistance of the point rail, and the working less efficient. Contents of the invention [0003] The invention p...

Claims

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Application Information

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IPC IPC(8): C21D1/09E01B7/02
Inventor 孙庆水黄晓林丁晓波薄涛陶金波艾传才庞英章尹维一高波
Owner 济南钢铁集团新事业有限公司
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