A tube furnace isothermal hot gas quenching device
A technology of quenching device and tube furnace, which is applied in the direction of quenching device, quenching agent, heat treatment equipment, etc., can solve the problems of high modification cost, hidden safety hazards, high cooling rate of furnace tube, etc., and achieve easy maintenance, convenient operation, and saving experiments cost effect
Active Publication Date: 2022-05-24
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
However, if the gas quenching method is used for cooling, the gas jet formed along the gas nozzle may cause the local cooling rate of the furnace tube to be too high, posing a safety hazard
At the same time, most of the current laboratory tube furnaces are not designed with a gas quenching inlet channel, and the cost of modification is too high
Method used
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[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings, the examples given are for illustrative purposes only and are not intended to limit the scope of the present invention. The present invention will be further described in detail below in conjunction with the accompanying drawings and a specific embodiment.
[0023] If attached Figure 1 As shown, the present invention is a tube furnace isothermal gas quenching device, comprising a stainless steel flange disc 1, a bottom tray 2, a cooling chamber 3, a cooling airway 4;
[0024] The stainless steel flange 1 is provided with an inlet channel 5, an outlet channel 6; the base tray 2 is mounted on the stainless steel flange 1, the cooling chamber 3 is fixed to the surface of the bottom tray 2 by bracket 7.
[0025] The size of the stainless steel flange 1 is adapted to the tube furnace tube, which is fixed to the furnace tube by a card hook, and the gas tightness...
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The invention relates to an isothermal hot gas quenching device for a tubular furnace, and relates to the technical field of metal heat treatment. The device is composed of a stainless steel flange, a bottom bracket, a cooling chamber and a cooling air channel. The stainless steel flange is provided with an air inlet channel and an air outlet channel. The bottom bracket is installed on the stainless steel flange, and the cooling chamber is fixed on the bottom through a bracket. support surface. The cooling chamber is divided into a quenching area and a heat exchange area. The cooling gas passes through the cooling air channel to quickly cool down the sample in the quenching area, and then discharges into the furnace in the form of turbulent flow in the heat exchange area after sufficient heat exchange. The gas quenching method adopted in the present invention has no risk of surface oxidation in the whole process, and can meet the needs of different heat treatment experimental processes by adjusting the gas flow rate and gas temperature. Moreover, the invention has low experimental cost, high safety, and is convenient for modification and maintenance. It can be applied to tube furnaces of different models / pipe diameters without additional modification of equipment, which greatly improves experimental efficiency and operability.
Description
Technical fields: [0001] The present invention relates to the field of metal heat treatment technology, in particular a tube furnace isothermal gas quenching device. Background: [0002] Austenitic isothermal quenching is a type of austenitic steel that cools to a martensitic transition temperature (M S The above is fully insulated, and the graded quenching process to be further slowed to room temperature after the austenite isothermal transformation is completed. Usually, this quenching process needs to be carried out in a salt bath, not only to insulate the molten salt before quenching, resulting in additional equipment burden and great environmental pollution. Cooling and quenching by replacing the salt bath with high-temperature inert gas has the technical characteristics of clean and efficient, which undoubtedly becomes a more ideal rapid quenching process. [0003] Chinese patent CN 210085508 U discloses a high-pressure gas quenching salt bath isothermal quenching three-cha...
Claims
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IPC IPC(8): C21D1/62C21D1/613
CPCC21D1/62C21D1/613
Inventor 李根唐海燕刘华松张家泉何涛
Owner UNIV OF SCI & TECH BEIJING