An annealing control method of an automatic control spring washer

An automatic control, spring washer technology, applied in the direction of heat treatment process control, manufacturing tools, furnaces, etc., to achieve the effect of good hardness and uniformity of structure, smooth surface and smooth edge

Active Publication Date: 2020-12-01
杭州弹簧垫圈有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing annealing control methods for spring washers still cannot meet the above requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The spring washer material is selected from 65Mn spring steel with a specification of 12mm. First place the spring washer in the annealing unit. Then fill the annealing device with methanol, and the methanol flow rate is 40cc / min; after monitoring that the air in the annealing device is exhausted, continue to charge methanol for 30 minutes. Carry out a temperature program, from room temperature to 750°C, with a heating rate of 10°C / min, then keep warm for 100min, and stop charging methanol after the keep warm. Subsequently, the temperature was programmed to drop at a rate of 0.5°C / min, from 750°C to 705°C. During this process, nitrogen gas was filled, and the flow rate of nitrogen gas was 90cc / min. Keep warm at 705°C for 240min, then cool down to 650°C at a cooling rate of 1.0°C / min; stop feeding nitrogen after cooling down, and start to discharge gas at the same time. When the temperature in the furnace is lower than 550°C, take out the spring washer and air cool to ...

Embodiment 2

[0045] The spring washer material is selected from 65Mn spring steel with a specification of 12mm. First place the spring washer in the annealing unit. Then fill methanol into the annealing device, and the methanol flow rate is 20cc / min; after monitoring that the air in the annealing device is exhausted, continue to charge methanol for 60 minutes. Carry out a temperature program, from room temperature to 750°C, the temperature rise rate is 6°C / min, and then keep warm for 50min, stop charging methanol after the keep warm. Subsequently, the temperature was programmed to drop at a rate of 0.1°C / min, from 750°C to 705°C. During this process, nitrogen gas was filled, and the flow rate of nitrogen gas was 60cc / min. Keep warm at 705°C for 180min, then cool down to 650°C at a cooling rate of 0.5°C / min; stop feeding nitrogen after cooling down, and start to discharge gas at the same time. When the temperature in the furnace is lower than 550°C, take out the spring washer and air cool...

Embodiment 3

[0048]The spring washer material is selected from 65Mn spring steel with a specification of 12mm. First place the spring washer in the annealing unit. Then fill the annealing device with methanol, and the flow rate of methanol is 60cc / min; after monitoring that the air in the annealing device is exhausted, continue to charge methanol for 10 minutes. Carry out temperature program, rise from room temperature to 750°C, the temperature rise rate is 16°C / min, then keep warm for 150min, stop charging methanol after the keep warm. Subsequently, the temperature was programmed to drop at a rate of 0.9°C / min, from 750°C to 705°C. During this process, nitrogen gas was filled, and the flow rate of nitrogen gas was 120cc / min. Keep warm at 705°C for 300min, then cool down to 650°C at a cooling rate of 1.5°C / min; stop feeding nitrogen after cooling down, and start to discharge gas at the same time. When the temperature in the furnace is lower than 550°C, take out the spring washer and air ...

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Abstract

The invention relates to an automatically controlled annealing control method of spring washers. According to the method, an annealing atmosphere of first methanol and following nitrogen and a two-section annealing process are adopted at the same time, so that the hardness and the structure uniformity of the spring washers can be good, the surfaces are flat, the edges are smooth, and no burr phenomenon exists.

Description

technical field [0001] The invention relates to the field of annealing of spring washers, in particular to an automatically controlled annealing control method of spring washers. Background technique [0002] In the existing processing of spring washers, the raw materials used are usually uneven in hardness and structure. In this case, if it is directly quenched or tempered, the mechanical properties of the spring washer will be poor, which will affect the use of the spring washer. Therefore, the annealing process of the spring washer is the key point of the process. After effective annealing, the spring washer not only has good hardness and uniform structure, but also has a smooth surface, smooth edges, and no burrs. However, the existing annealing control methods for spring washers still cannot meet the above requirements. Contents of the invention [0003] The object of the present invention is to provide an annealing control method of an automatic control spring wash...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D11/00C21D9/02C21D1/26C21D1/76
CPCC21D1/26C21D1/76C21D9/02C21D11/00
Inventor 赵关祥俞世勇严柏赢李水文唐水陆
Owner 杭州弹簧垫圈有限公司
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