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Heat treatment process for self-tightening nut and self-tightening gasket

A technology of self-tightening nuts and gaskets, which is applied in the field of manufacturing, can solve the problems of complex installation process, low service life of high-temperature fasteners, and frequent maintenance, and achieve low maintenance costs, extended practical life, and the effect of overcoming fastening

Active Publication Date: 2021-03-19
ZHEJIANG ZIJINWANG MACHINARY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in most chemical enterprises in my country, the service life of high-temperature fasteners is relatively low, and the installation process is complicated, and the problem points are often repaired.

Method used

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  • Heat treatment process for self-tightening nut and self-tightening gasket
  • Heat treatment process for self-tightening nut and self-tightening gasket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] As shown in the figure, a heat treatment process for self-tightening nuts and self-tightening washers specifically includes the following steps:

[0034]2.1) Material forming steps: select high-temperature resistant alloy steel, and control the carbon and carbide content in it, control the carbon quality at 0.3% to 0.5%, and add a small amount of chromium, molybdenum, vanadium, nickel, manganese, silicon, and add A small amount of molybdenum or tungsten forms a new heat-resistant alloy material; the new heat-resistant alloy material forms a self-tightening nut or a self-tightening washer after cold heading. The metals chromium, molybdenum, vanadium, nickel, manganese, and silicon are added, and a small amount of molybdenum or tungsten is added, and the total amount of added metals is controlled within 1% of the overall mass. Generally, the elements to be added can be added at a mass ratio of 1:1, that is, 1g of chromium, molybdenum, vanadium, nickel, manganese, and sili...

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Abstract

The invention discloses a heat treatment process for a self-tightening nut and a self-tightening gasket. The heat treatment process comprises the following steps of 2.1, material forming; 2.2, charging; 2.3, quenching treatment; and 2.4, tempering treatment. The heat treatment process of the self-tightening nut and the self-tightening gasket has the advantages of high temperature resistance, wearresistance and high hardenability.

Description

technical field [0001] The invention relates to the field of manufacturing, and more particularly to a heat treatment process for a self-tightening nut and a self-tightening washer. Background technique [0002] High temperature resistant fasteners are an important connector in the production of the chemical industry, and have been widely used with the development of industrial technology. However, because of its insufficient anti-loosening performance, displacement and leakage often occur. The working environment of chemical fasteners is harsh, and they are constantly subjected to thermal loads in the process of chemical cooling and heating cycles. At present, in most chemical enterprises in my country, the service life of high-temperature fasteners is relatively low, and the installation process is complicated, and the problem points are often repaired. Practice has proved that in the design and manufacture of high temperature resistant fasteners, if the appropriate stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/18C22C38/44C22C38/46C22C38/04C22C38/02
CPCC21D9/0093C21D9/0068C21D1/18C22C38/44C22C38/46C22C38/04C22C38/02
Inventor 李政冀
Owner ZHEJIANG ZIJINWANG MACHINARY CO LTD
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