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Hardening method for guide rail of elevator

A technology for elevator guide rail and hardening treatment, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of string noise, rigidity and hardness defects, and achieve the effect of improving hardness and rigidity and avoiding extrusion and brittle cracking.

Inactive Publication Date: 2012-07-04
ZHEJIANG UNITED ELEVATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional elevator guide rails are not subjected to heat treatment process, so there are defects in rigidity and hardness, which makes the series motion noise appear after long-term use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below in conjunction with the examples, but not as a basis for limiting the present invention.

[0018] A method for hardening an elevator guide rail, comprising the steps of:

[0019] A. Preheating;

[0020] B. Quenching;

[0021] C. Temper for the first time, then cool to room temperature;

[0022] D. Temper for the second time and cool to room temperature again.

[0023] In the step A, the preheating temperature is 540° C. and kept for 1 hour.

[0024] In the step B, the quenching temperature is 1000-1200° C. (the optimal temperature is 1100° C.), and the temperature is kept for 15 minutes, and oil quenching is used.

[0025] In the steps C and D, the tempering temperature for the first tempering and the second tempering is 490-510° C. (the optimal temperature is 500° C.), and the holding time is 2 hours.

[0026] In the step D, oil cooling is used for the first tempering.

[0027] After step D is completed, soft ...

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Abstract

The invention discloses a hardening method for a guide rail of an elevator. The method comprises the following steps: preheating; quenching; primary tempering and then cooling down to the room temperature; and secondary tempering and then cooling down to the room temperature. As the quenching process is combined with the twice tempering process for heating the guide rail during the hardening treatment, the rigidity and the rigidity of the guide rail can be improved.

Description

technical field [0001] The invention relates to a treatment method for elevator guide rails, in particular to a hardening treatment method specially used for elevator guide rails. Background technique [0002] The elevator guide rail is a safe rail for the elevator to run up and down in the well. The guide rail is installed on the well wall, and is fixedly connected to the well wall by the guide rail frame and the guide rail bracket. The guide rails commonly used in elevators are "T"-shaped guide rails. Strong rigidity, high reliability, safe and cheap. The plane of the guide rail must be smooth, without obvious uneven surface. Since the guide rail is the shuttle rail of the guide shoe on the elevator car and the safety gear, the clearance must be ensured during installation. At the same time, the guide rail has to bear the responsibility of stopping the elevator when the elevator has an overspeed accident, so its rigidity cannot be ignored. Moreover, since the elevator ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/18
Inventor 李振浩
Owner ZHEJIANG UNITED ELEVATOR
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