Sintering Vacuum Heat Treatment Furnace for Quenched Annealed Tempered Carburized

The Vacuum Heat Treatment Furnace Can Be Quenched, Annealed, Tempered, Carburized, Nitriding, Vacuum Brazing, Sintering, Surface Treatment And Other Heat Treatment Processes.

※ Equipment use:

It can achieve rapid heating and cooling, can achieve no oxidation, no decarburization, no carburizing, can remove the phosphorus chips on the surface of the workpiece, and has the effect of degreasing and degassing, so as to achieve the effect of bright surface purification. Vacuum heat treatment can achieve almost all heat treatment processes, such as quenching, annealing, tempering, carburizing, nitriding, in the quenching process can achieve gas quenching, oil quenching, salt quenching, water quenching, etc., can also be vacuum brazing, sintering, surface treatment and other heat treatment processes.

※ Equipment features:

The furnace pot of the external heat treatment furnace is mostly cylindrical, which is completely placed in the furnace body or partially extended out of the furnace body in the horizontal or vertical direction to form a cooling chamber. In order to improve the furnace temperature and reduce the pressure difference between inside and outside the furnace tank to reduce the deformation of the furnace tank, a double vacuum design can be used, that is, another set of low vacuum device is used in the space outside the furnace tank. In order to improve productivity, a semi-continuous vacuum furnace consisting of a charging chamber, a heating chamber and a cooling chamber can be used. Each chamber of the furnace has a separate vacuum pumping system, and there is a vacuum seal door between the chamber and the chamber. In order to implement rapid cooling, the cooling chamber can be filled with inert gas and connected with the heat exchanger for forced circulation cooling.

The furnace tank is the key component of the external heat treatment vacuum furnace, which works at high temperature and one atmosphere (external pressure). The furnace material shall have the following conditions:

1. Good thermal stability and oxidation resistance.

2. The welding performance is good, the weld should have no porosity and cracks, and have sufficient high temperature strength and air tightness.

3. The vapor pressure of alloying elements in the material composition should be low to prevent the alloying elements from volatilizing under high temperature and high vacuum.

4. The coefficient of thermal expansion should be small, and the oxidation layer of the furnace tank should not be destroyed under the conditions of repeated heating and cooling. In practical applications, the furnace wall should have an appropriate thickness to prevent oxidation loss and heat deformation.

The advantages of external vacuum heat treatment furnace are as follows:

1. Simple structure, easy to manufacture.

2. The vacuum volume is small, the exhaust volume is small, and in addition to the workpiece, there are few other components that need to be degassed in the furnace tank, which is easy to achieve high vacuum.

3. The electric heating element is heated externally (except for double vacuum), and no vacuum discharge occurs.

4. The furnace mechanical action is less, the operation is simple, the fault is less, the maintenance is convenient.

5. The workpiece is not in contact with the lining, and no chemical reaction occurs.

The disadvantages of external vacuum heat treatment furnace are as follows:

1. The heat transfer efficiency of the furnace is low, and the workpiece heating speed is slow. 2) Limited by the material of the furnace tank, the operating temperature of the furnace is generally lower than 1000~1100℃.

2. Part of the furnace pot is exposed to the atmosphere, and although the heat shield can be set, the heat loss is still large.

3. The furnace heat capacity and thermal inertia are very large, and the control is difficult.

4. The service life of the furnace is short.

※ Design and Manufacture certification:

1. The indicators are designed and manufactured according to the national standards of industrial furnaces

2. Conduct the performance test of various components and issue a report (support customer on-site pre-acceptance)

3. The export of equipment meets the international standards for export.

Technical parameters (maximum operating temperature of commonly used furnace materials)