Practical applications of induction furnace

Practical applications of induction furnace

A, induction furnace used for heat treatment: all kinds of metal partial or whole quenching, annealing, tempering, diathermy;
Second, the induction furnace used for thermal type: the whole parts forging, forging, hot upsetting, hot rolling;
Three, induction furnace is used for welding, brazing of various kinds of metal products, all kinds of cutter blades, saw blade welding, steel pipe, copper pipe welding, the same dissimilar metal welding;
Four, induction furnace used for smelting metal: gold, silver, copper, iron, aluminum and other metal (vacuum), smelting, casting molding and evaporation coating;
Five, high-frequency heating machine other applications: semiconductor crystal growth, shrink fit, bottle heat sealing, toothpaste heat sealing, powder coating, metal implants plastic, etc.

Vacuum brazing furnace mainly Outlines and performance

Vacuum brazing furnace mainly Outlines and performance

Vacuum brazing furnace in vacuum arc of high temperature melting can make metal degassing, oxygen, and the process of removing impurities, pure metal billet is achieved. Under the action of molten metal in the water cooled copper crucible cooling solidification, as a result, high melting rate and the precise control of arc heating area, can guarantee the consistency of the direction of the molten metal solidification, and prevent solidification macro segregation and reduce the number of micro segregation, greatly improving the solidification of the ingot metal performance.

What is the importance of the vacuum furnace cooling system?

What is the importance of the vacuum furnace cooling system?

Vacuum furnace is electric heating element near the vacuum heating furnace. Vacuum furnace cooling system is an important part of vacuum furnace. Cooling water should maintain smooth, otherwise the temperature rise caused downtime. This is vacuum furnace work often neglected problems When no one management major damage may result in vacuum furnace.
Molybdenum vacuum furnace heating after long time use will harden, shrinkage, drop, lodging first lap, after fusing (melting) wait for a phenomenon. To make the vacuum furnace heating wire is necessary strength at high temperature, prevent hardening, collapsed or droop, first to design the structure of the vacuum furnace heating wire size, such as spiral wire, pay attention to the heating element bending diameter, pitch and screw pitch diameter, etc. The heating body is going to loose by vacuum furnace insulation lining, 95 ceramic on insulation lining is put aside, leave the expansion space. Shelve location should be suitable for, one is in commonly 100 ~ 100 mm, and can prevent resistance wire to lie prone on strong hook. Also should avoid furnace silk direct contact between each other (short circuit), usually to pad spacer.
Deal with cooling water with biological decomposition chemical auxiliary method, the purpose is to keep the minerals in suspended state, reduce the rubber tube, coil and water jacket in sediment accumulation, to make the water clear. This generally adopts an automatic device to complete, it can monitor the conductivity of the water, automatically added chemicals, wash water, add fresh water. Cooperate with auxiliary steam filtration system, this method can guarantee the pH of the water control, to prevent redundant mineral deposits in the cooling water system. After the system work stable, at least once a month for the water quality test case after processing or owed.

Good performance of vacuum brazing furnace

                          Good performance of vacuum brazing furnace

Vacuum brazing furnace to maintain excellent soldering quality depends on the performance of the vacuum unit. Often, vacuum pump needs to be careful not to think that "you never turn it off, it will run forever." If vacuum maintenance crew at the time, on weekends and holidays shutdown, more economical to do so. Otherwise, if still idling at the weekend, mechanical pump will be stuck and difficult to start again. The results of our experiments show that this method can save a lot of electricity.
Due to the lack of water or overheating, mechanical pump overheating, and noises. It's better to keep the water temperature is 140. (60 ~ 150 F a 6 ℃), the use of portable devices to pump oil filter once a week, check the oil level and take sample, check the oil quality by feeling and appearance. A few years ago, we have found that the mechanical pump with high quality oil is more economic. The cost of high quality oil is generally more than three times of industrial oil, and keep the pump qing jie time is five times the sustainable. Live a door should be changed every three months and spring. Stainless steel spring live longer.

The safety of the vacuum furnace characteristics

The safety of the vacuum furnace characteristics

Vacuum furnace that vacuum heat treatment technology and comprehensive technology, the combination of the two professional heat treatment is to point to the whole and part of heat treatment process in a vacuum. Our country could be divided into low, medium and high vacuum and high vacuum. At present most of the vacuum heat treatment furnace work vacuum degree in 1.33 ~ 1.33 x 10 ˉ after Pa.
Vacuum heat treatment can achieve almost all heat treatment process, such as quenching, annealing, tempering, carburizing, nitriding, during the quenching process can realize gas quenching, quenching oil, water nitrate quenching, quenching, etc., can also be vacuum brazing, sintering and surface treatment, etc. Vacuum heat treatment furnace thermal efficiency is high, which can realize the rapid heating and cooling, which can realize no oxidation and decarburization, carburizing, can remove phosphorus crumbs on the surface of the workpiece, and has the effect such as degreasing degassing, so as to achieve the surface brightness purification effect. Generally speaking, the processed workpiece in the heating furnace is slow, and internal temperature difference is small, the thermal stress is small, so little deformation. Product qualified rate is high. Can reduce costs, have degassing effect, so as to improve the mechanical properties of the work and life. Good working environment, safety operation, no pollution and no pollution. Be processed workpiece no hydrogen embrittlement risk, to prevent surface of the titanium and refractory metal shell hydrogen embrittlement, stability and repeatability of vacuum heat treatment process. A series of advantages, the development of vacuum heat treatment equipment and process was more and more attention and applied more and more.

Development of a vacuum furnace

Development of a vacuum furnace

The creation and development of vacuum furnace plays an very important role in human progress. Appeared in the shang dynasty in China, relatively perfect copper smelting furnace, furnace temperature reached 1200 ℃, the stove inside diameter of 0.8 meters. In the spring and autumn period and the warring states period, people in molten copper furnace on the basis of further mastered the technology of improving furnace temperature, thus produce the cast iron in 1794, the world was introduced to direct the cylindrical cupola melting cast iron. In 1864, after the French Martin by using the principle of the British Siemens regenerative furnace, built the first steel open hearth is heated with gas fuel. He used the regenerator to high temperature of air and gas, so as to ensure the steel needed for the temperature above 1600 ℃. Around 1900, power supply sufficient gradually, started to use a variety of resistance furnace, electric arc furnace and cored induction furnace.
In the 20th century 50 s, coreless induction vacuum furnace to get rapid development. Then the electron beam furnace, the use of electron beam to impact solid fuel, can strengthen the surface heating and melting of the high melting point materials. Used to forge heating furnace was first hand forge, the working space is a concave groove, groove filling in coal, combustion with air from the bottom of the tank for the artifacts buried heating in the coal. This furnace thermal efficiency is very low, the heating quality is not good, and only small workpiece heating, after development for refractory brick build by laying bricks or stones becomes close partly or fully enclosed chamber of a stove or furnace chamber furnace, can use coal, gas or oil as fuel, also can use electricity as a heat source, the artifacts in the chamber of a stove or furnace heating.

The primary principle of vacuum brazing furnace

The primary principle of vacuum brazing furnace

Vacuum brazing furnace is in a vacuum environment to maintenance of sintering furnace heated objects, the heating method is more, such as resistance heating, induction heating, microwave heating, etc. Vacuum induction furnace is the use of induction heating to maintenance of sintering furnace heated objects can be divided into the power frequency, medium frequency, high-frequency, such as type, can be attributable to a subclass of vacuum brazing furnace. Vacuum induction furnace Vacuum induction furnace is in a vacuum or maintain atmosphere conditions, using the principle of intermediate frequency induction heating make carbide cutter head, and all kinds of metal powder limit sintered body implementation of complete sets of equipment, is for hard alloy, metal dysprosium, and planning in the industrial production of ceramic materials.
A hydrogen sintering furnace, vacuum induction tungsten first principle and use vacuum induction furnace tungsten is after vacuum filling hydrogen maintenance conditions, using the principle of intermediate frequency induction heating, the high temperature of tungsten crucible in the winding, after thermal conduction to the work, suitable for scientific research, military units for hard metal such as tungsten, molybdenum and its alloy powder sintering molding. Second, primary layout and layout method for vertical, the discharging method. Its primary group became: electric furnace body, vacuum system, water cooling system, pneumatic system, hydraulic system and front-rear institutions, base, workbench, induction heating equipment (tungsten heater and high-grade thermal insulation material), into the electric equipment, intermediate frequency power supply and electrical control system, etc. Third, primary function After vacuum filling the hydrogen gas maintenance and control atmosphere in furnace pressure and sintering conditions. Available optical fiber infrared radiation thermometer and the armoured thermocouple temperature measurement (0 ~ 2500 ℃), and after comparing the intelligent temperature control and setting process, select performance status feedback to medium frequency power supply, automatic control temperature of concave and convex and heat preservation program