On 2018-08-08 14:48:54
High temperature box furnace of performance advantage and operation mode
In recent years, with the rapid development of economy and the improvement of all aspects of life, the high-temperature box furnace is actually a heat treatment process of quenching process, which can be used for heating, heat preservation and cooling. Do you know what are the performance characteristics of the high-temperature box furnace? How does it work? Next, we will have a detailed understanding of "performance advantages and operation mode of high temperature box furnace".
Characteristics, application and structure of high temperature box furnace
With China's attention to industrial pollution, high-temperature energy-saving furnaces are gradually replacing kilns heated by heavy oil and coal. High temperature energy-saving furnaces are heated by electric energy, and there is no pollution in the heating process. The market of high-temperature energy-saving furnaces is gradually expanding. Heat treatment is required for 70% of parts in the mechanical industry, 70% ~ 80% of parts in the automobile and tractor industries, and for tools, cutting tools and bearing products.
Even though the service life of some civil light industrial metal products, most of them are also improved by heat treatment. The fastener industry, bearing industry, chain industry, tool industry, automobile, tractor, motorcycle parts industry all rely on heat treatment quality to compete for the market.
With the development of industry in ten years, it is predicted that 400000 ~ 500000 tons of new heat processing capacity will be added every year. In addition, most of the domestic electric furnace equipment is old and backward, which will tend to be eliminated and new. Therefore, the demand for high-temperature energy-saving electric furnace is still large.
There are called high temperature furnace, high temperature electric furnace, box furnace, etc. High temperature box type electric furnace is an important heating equipment, but also a common industrial furnace. Most of the furnace lining is made of refractories and thermal insulation materials, and the internal atmosphere is mostly atmospheric air, but there are also external heating well furnace working in hydrogen, nitrogen or vacuum state, and the service temperature is generally between 1100 ℃ and 1700 ℃.
High temperature box furnace is widely used in ceramics, metallurgy, electronics, glass, chemical industry, machinery, refractories, new material development, special materials, building materials and other fields. All industrial and mining enterprises, colleges and universities, scientific research units, small steel quenching, annealing, tempering heating.
Mechanism of high temperature box type electric furnace
1. Furnace door; 2. Electric heating element; 3. Furnace shell; 4. Control box; 5. Main realization of high temperature box furnace with furnace lining
1. Do not exceed the temperature of high-temperature electric furnace to avoid burning out.
2. When adding and removing the articles in the electric furnace, be sure to turn off the power to prevent electric shock.
3. Pay attention to prevent any liquid from entering the furnace to avoid corrosion of the furnace.
4. Do not put greasy or liquid articles in the furnace.
5. When taking out the articles inside the industrial furnace, be careful not to burn them.
6. When placing articles in the furnace, take care to avoid damaging the refractory in the furnace.
7. Only after strict training can we produce and process.
[use of high temperature box furnace]
The heat treatment process of high temperature box furnace generally includes three processes: heating, heat preservation and cooling, sometimes only heating and cooling. These processes are connected with each other and can not be interrupted. Heating is one of the important processes of heat treatment. There are many heating methods for metal heat treatment, which used charcoal and coal as heat sources, and then used liquid and gas fuels. The application of electricity makes heating easy to control and no environmental pollution. These heat sources can be used to heat directly, or indirectly through molten salt or metal, or even floating particles.
When the metal is heated in the high temperature box furnace, the workpiece is exposed to the air, which often occurs oxidation and decarburization (that is, the carbon content on the surface of steel parts is reduced), which has a very adverse effect on the surface performance of the parts after heat treatment. Therefore, the metal should be heated in controllable or protective atmosphere, molten salt and vacuum, and can also be protected by coating or packaging.
Tempering is the rapid cooling of workpiece in water, oil or other inorganic salt, organic water solution and other quenching medium after heating and heat preservation. After quenching, the steel becomes hard but brittle at the same time. In order to reduce the brittleness of steel parts, the quenched steel parts are kept warm for a long time at a proper temperature higher than room temperature but lower than 650 ℃, and then cooled. This process is called tempering. Annealing, normalizing, quenching and tempering are the "four fires" in the whole heat treatment, in which quenching and tempering are closely related and often used together. With the different heating temperature and cooling mode, the "four fire" has evolved different heat treatment processes.
In order to obtain a certain strength and toughness, the process of combining quenching and high temperature tempering is called tempering. After some alloys are quenched to form supersaturated solid solution, they are kept at room temperature or a higher appropriate temperature for a long time to improve the hardness, strength or electrical magnetism of the alloy. Such heat treatment process is called aging treatment.
The above introduction about "the characteristic application and structure of high temperature box furnace" and "the use of high temperature box furnace" will help you to understand "the performance advantage and operation mode of high temperature box furnace".