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Salt bath quenching furnace convenient to control temperature drop

A technology for controlling temperature and quenching furnace, applied in the direction of quenching agent, quenching device, heat treatment bath, etc., can solve the problem that the salt medium fails to meet the cooling requirements, affects the quenching effect of components and the service life of the salt medium, and achieves convenient heat output. Power, good forced cooling effect, rapid heating effect

Inactive Publication Date: 2017-03-08
黄鸣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the above-mentioned existing salt bath furnaces, when the volume of a single component itself is large or the number of components is large, the high initial temperature of the component or the requirements of the quenching process may require the component to obtain a relatively rapid cooling, but the purely molten salt medium Generally, the above-mentioned cooling requirements cannot be met, and the above technical problems directly affect the quenching effect of the components and the service life of the salt medium. The present invention provides a salt-bath quenching furnace that is easy to control the temperature drop

Method used

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  • Salt bath quenching furnace convenient to control temperature drop
  • Salt bath quenching furnace convenient to control temperature drop

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Embodiment 1

[0020] Such as figure 1 and figure 2 As shown, the salt bath quenching furnace that is convenient to control the temperature drop includes a bath body 3, the bath body 3 is a barrel-shaped structure provided with a furnace 4, and the bath body 3 is also provided with a heating device for heating the furnace 4 , the bath body 3 includes an inner cylinder 31 and an outer cylinder 32, the outer cylinder 32 is nested on the outside of the inner cylinder 31, and there is a gap between the inner cylinder 31 and the outer cylinder 32, the gap constitutes the cooling partition wall 2, The heating device is an electric heating belt 5 fixed on the inner surface of the inner cylinder 31 , and the outer cylinder 32 is also provided with a heat insulating layer 7 .

[0021] In this embodiment, the outer cylinder 32 provided above is used to house the inner cylinder 31 , the furnace 4 is located on the inner cylinder 31 , and the electric heating belt 5 provided is used to heat the heatin...

Embodiment 2

[0023] The present embodiment is further limited on the basis of embodiment 1, as figure 1 and figure 2 As shown, in order to facilitate the maintenance of the cooling partition wall 2 between the inner cylinder 31 and the outer cylinder 32 , a spacer plate 6 for fixing the relative positions of the inner cylinder 31 and the outer cylinder 32 is also included in the cooling partition wall 2 .

[0024] In order to further enrich the function of the partition plate 6, so that the partition plate 6 can play a role in dividing the path used for cooling medium circulation in the cooling partition wall 2, so as to improve the heat transfer efficiency, the inside and outside of the partition plate 6 are respectively the outer side of the inner cylinder 31, The inner side of the outer cylinder 32 is in contact with or fixed as a spiral disk structure.

[0025] In order to facilitate uniform heating of the heating medium, avoid local high temperature causing changes in the compositio...

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Abstract

The invention discloses a salt bath quenching furnace convenient to control a temperature drop. The salt bath quenching furnace comprises a bath tank body; the bath tank body is a barrel-shaped structure provided with a hearth; the bath tank body is provided with a heating device for heating the hearth; the bath tank body includes an inner cylinder and an outer cylinder; the outer cylinder is embedded on the outer side of the inner cylinder; a gap is formed between the inner cylinder and the outer cylinder, and forms a cooling wall; the heating device is an electric heating strip fixed on the inner surface of the inner cylinder; and a thermal insulation layer is arranged on the outer side of the outer cylinder. When the salt bath quenching furnace is applied to heat low-hardenability metal, a heating medium in the hearth can be preferably and forcedly cooled, so that the structure can adopt molten salt to quench and heat the low-hardenability metal; the salt bath quenching furnace has the advantages of good forced cooling effect, easy manufacturing, and good temperature drop controllability; the salt bath quenching furnace adopts the electric heating strip to heat, so that the heat output power of the heating medium is convenient to control; and meanwhile, the electric heating mode is fast in heating.

Description

technical field [0001] The invention relates to the field of heat treatment of mechanical engineering metal materials, in particular to a salt bath quenching furnace which is convenient for controlling temperature drop. Background technique [0002] Metal heat treatment is to heat a metal workpiece in a certain medium to a suitable temperature, and keep it at this temperature for a certain period of time, and then cool it in a different medium at different speeds, by changing the surface or internal microstructure of the metal material A process in which the structure is used to control its performance. The medium for isothermal quenching and graded quenching usually uses salt medium. According to the specific quenching temperature, the above salt medium can be sodium chloride, potassium chloride, barium chloride, sodium cyanide, potassium cyanide, sodium nitrate, nitric acid One or more of salts such as potassium. As the cooling medium, the salt medium not only has low pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/63C21D1/607C21D1/46
Inventor 黄鸣
Owner 黄鸣