Method for preventing slender tubular component from burning in oil quenching of heat treatment

A technology of heat treatment oil and heat treatment furnace, which is applied in the field of heat treatment, can solve the problems of air pressure rise and danger, etc., and achieve the effect of eliminating fire, ensuring the quenching effect, and eliminating the danger of fire

Active Publication Date: 2014-10-22
XI'AN AIRCRAFT INTERNATIONAL
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Problems solved by technology

However, after such slender tubular parts are heated at a high temperature (above 800°C) in heat treatment, at the moment of quenching into quenching oil, the temperature of the tube is still very high because the lower end of the long tube has just entered the oil tank, and most of the volume of the long tube is still exposed to In the air, and the inner diameter is very small, so that a small amount of quenching oil entering the inner diameter of the slender tube, under the action of high temperature and air, instantly reaches the flash point of the quenching oil and burns, and the air pressure in the slender tube rises instantaneously due to the combustion. As a result, the slender tube sprays fire from the upper end of the tube at the moment of quenching, and the sprayed flame can sometimes reach 1-2 meters. There are a large amount of quenching oil and flammable and explosive saltpeter tanks on site in the heat treatment section. situation, very dangerous

Method used

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  • Method for preventing slender tubular component from burning in oil quenching of heat treatment

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Embodiment Construction

[0009] The material of the cap-shaped plug in the implementation can be selected from any steel material without affecting the normal quenching of the parts, but generally speaking, it is best to choose the same material as the parts.

[0010] Referring to the accompanying drawings, there is a cap-shaped plug 3 matching the nozzle diameter of the elongated tubular part 1, the side wall of the plug is provided with a connecting hole 2, and the bottom of the plug is provided with an oil leakage hole 4; Before heat treatment and oil quenching, fasten the cap-shaped plug 3 to the nozzle at one end of the part, the side wall of the plug is fixed on the side wall of the nozzle of the part 1 with the connecting piece 5, and the drain at the bottom of the plug is connected with the bolt 6 On the oil hole 4, block the oil leakage hole 4; hang the part 1 vertically in the heat treatment furnace with the nozzle end of the cap-shaped plug 3 facing down; after the quenching is completed, th...

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Abstract

The invention relates to a method for preventing a slender tubular component from burning in oil quenching of heat treatment. A cover-shaped plug matching with a tube orifice diameter of the slender tubular component is provided. An oil-leaking hole is arranged at the bottom of the plug. Before the component is subjected to the heat treatment, the cover-shaped plug is buckled to one end tube orifice of the component, so that the oil-leaking hole is blocked and then quenching treatment is carried out. With the above method, risks of burning can be effectively prevented; and a quenching effect of the tubular component is guaranteed, so that the component can be fully quenched rapidly.

Description

technical field [0001] The application belongs to the field of heat treatment, and in particular relates to a method for preventing elongated tubular parts from bursting into flames during heat treatment oil quenching. Background technique [0002] Generally, during heat treatment of elongated tubular parts, in order to effectively prevent heat treatment deformation, they are usually hung vertically in a heat treatment furnace for heating, heat preservation and quenching. However, after such slender tubular parts are heated at a high temperature (above 800°C) in heat treatment, at the moment of quenching into quenching oil, the temperature of the tube is still very high because the lower end of the long tube has just entered the oil tank, and most of the volume of the long tube is still exposed to In the air, and the inner diameter is very small, so that a small amount of quenching oil entering the inner diameter of the slender tube, under the action of high temperature and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/08C21D1/63
Inventor 周英刘小龙史建猛张西王凌
Owner XI'AN AIRCRAFT INTERNATIONAL
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