Internal heating and united stirring type isothermal quenching salt-bath device

A kind of isothermal quenching and salt bath technology, applied in quenching device, heat treatment equipment, heat treatment process control and other directions, can solve the problems of not achieving improved performance of isothermal quenching, difference in workpiece performance, low toughness, etc., to increase stability, reduce The effect of temperature fluctuation and temperature uniformity

Active Publication Date: 2014-08-06
WUHAN TEXTILE UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

When the quenching temperature is lower than 230°C, it is easy to form martensitic structure, which has high hardness, high brittleness and extremely low toughness; while it is easy to transform into ferrite and pearlite structure if it is hi

Method used

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  • Internal heating and united stirring type isothermal quenching salt-bath device

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0018] The structure of the internal heat combined stirring isothermal quenching salt bath device provided by the application is as follows: figure 1 As shown, the salt bath tank is in the shape of a cuboid and is made up of a stainless steel liner 1 and an insulating layer 10. The thickness of the stainless steel liner 1 is 5-8mm. The outside of the stainless steel liner 1 is provided with an insulating layer 10, and the insulating layer 10 has a thickness of 15 to 20 cm, and a workpiece rack for placing workpieces is provided in the salt bath. Described salt bath tank is provided with inner heating system, cooling system, combined stirring system and temperature control system, and wherein inner heating system is heating rod 5, and described heati...

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Abstract

The invention provides an internal heating and united stirring type isothermal quenching salt-bath device which at least comprises a salt bath tank, wherein a work piece rack is arranged in the salt bath tank; an internal heating system, a cooling system, a united stirring system and a temperature control system are also arranged in the salt bath tank, wherein the internal heating system consists of heating rods which are uniformly distributed in the salt bath tank; the cooling system consists of two cooling water coil pipes which are respectively arranged on two opposite inner walls of the salt bath tank; the united stirring system consists of a swinging unit and an air stirring unit, wherein the swinging unit comprises a swinging mechanism, and rails which are arranged on two sides of the top of the salt bath tank; the air stirring unit is an air pipe which is arranged at the bottom of the salt bath tank; air vents distributed uniformly are formed in the air pipe; the temperature control system comprises a temperature meter, a pipeline pump and a controller. The internal heating and united stirring type isothermal quenching salt-bath device is uniform in temperature, also small in temperature fluctuation range and capable of realizing automatic control.

Description

technical field [0001] The invention provides an internal heat combined stirring isothermal quenching salt bath device for heat treatment of austempering ductile iron (ADI), which belongs to the technical field of austempering ductile iron heat treatment. Background technique [0002] Austempered Ductile Iron (ADI) is a casting engineering material emerging in the past 30 years with high strength, high wear resistance and a certain degree of toughness. It is being continuously promoted and applied at home and abroad. [0003] ADI is obtained after the austempering process of cast ductile iron rough castings. The main process includes two processes of austenitization and austempering. The matrix structure of ADI is composed of acicular ferrite and high-carbon stable austenite. Academically, this mixed matrix is ​​called austenite. [0004] The manufacturing process is: cast ductile iron rough casting (spheroidal graphite + pearlite and ferrite matrix) → complete austenitizat...

Claims

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Application Information

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IPC IPC(8): C21D1/63C21D11/00
Inventor 龚文邦张云刘欢
Owner WUHAN TEXTILE UNIV
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