Vacuum degree of vacuum induction furnace how much is the best

Vacuum degree of vacuum induction furnace how much is the best

Many people think that the higher the vacuum degree of vacuum induction furnace, workpiece processing effect is better, actually otherwise, the vacuum degree of vacuum furnace should be based on the workpiece and the kinds of materials to decide, only chose the proper vacuum degree, will receive good effect.
When the pressure is less than the temperature of the vapor pressure, metal can produce evaporation (sublimation) phenomenon, like camphor in air by sublimation from solid evaporate into a gas. The smaller the outside pressure, the vacuum degree is higher, the easier it is to evaporate. So in vacuum heat treatment furnace, due attention must be paid to the problem of evaporation, think as long as to improve the vacuum degree of vacuum furnace, can achieve good effect of view is not comprehensive, must according to the types of artifacts, full attention to the problem of evaporation. Namely according to the alloy elements in the material being processed in the vacuum furnace of vapor pressure and heating temperature, to select the appropriate vacuum degree, in order to prevent the vacuum evaporation of alloy elements. As long as the vacuum degree of vacuum furnace choice is appropriate, is to prevent evaporation of alloy elements.
When heated in vacuum furnace, also can consider according to the types of metal materials, ventilation with inert gases, high purity or reverse gas to adjust the vacuum furnace, with a low vacuum heating method to prevent evaporation of the alloying elements, ventilation with high purity of inert gas can not only adjust the vacuum degree, and as a result of the existence of inert gas, form convection circulation, more conducive to the material evenly heating.

Induction heating equipment to let you have to trust the five virtues

Induction heating equipment to let you have to trust the five virtues

My company is not the first batch of domestic induction induction heating equipment enterprises, is the present domestic induction heating equipment in the industry word-of-mouth good, the biggest market share, that my company is how to get such big market achievement? Actually in the final analysis is compared to the other induction heating equipment manufacturing enterprise of five advantages:
First, the technology advantage. In technology, the production of induction induction heating equipment, medium frequency induction heating equipment automation equipment absorbed | products of new technology of Japan, Germany and then experienced engineers to optimize its reform continuously, the efficiency of the induction heating equipment, automated significantly increased, the stability of the induction heating equipment guaranteed;
Second, a performance advantage. In performance, for many years of technology import and independent innovation, make the induction inductive heating equipment more perfect function, higher degree of automation, performance compared to other manufacturers of induction inductive heating equipment performance is higher;
Third, the quality advantage. On the quality, the use of induction heating equipment industry the highest production standards, and the parts acceptance to guard a pass strictly, set up production key parts of induction heating equipment factory for processing, make the induction heating equipment spare parts quality is absolutely reliable guarantee;
Fourth, service advantages. On services, provide comprehensive services to the customers, help customers design and production processes, to provide technical support, to help installation and debugging equipment, later also can provide all kinds of induction heating equipment accessories, one-stop service to eliminate the customer's worries;
Fifth, the price advantage. On price, employ the most excellent talents, streamline personnel, using modern management system, shrinking production, management, operation costs, make sure that customers enjoy the most valuable induction of inductive heating equipment.

What are the main characteristics of vacuum induction furnace?

What are the main characteristics of vacuum induction furnace?

What are the main characteristics of vacuum induction furnace. The pressure inside the chamber of a stove or furnace smoke into industrial furnace is lower than the atmospheric pressure. Vacuum furnace heating power, the heated workpieces appearance no oxidation, no decarburization, small deformation, the mechanical performance is good. Use the vacuum furnace smelting metal is beneficial to remove impurities, less finished pinhole, segregation of small, good quality. Vacuum furnace is suitable for the high quality, high purity, refractory metal melting and heating, such as tungsten, molybdenum, tantalum, niobium, titanium, heat-resistant alloy steel exercise and magnetic materials, electrical materials of high strength steel, stainless steel, tool steel and die steel, heat treatment.
  Vacuum furnace usually by the chamber of a stove or furnace, heating equipment, sealing furnace shell, vacuum system, power supply system and temperature control system, etc. Sealing furnace shell made of carbon steel or stainless steel welding is removable parts of joint face seal with vacuum sealing material. In order to avoid heated furnace shell deformation and disintegration sealing material is heated, usually with water-cooled or air-cooled cooling furnace shell. Chamber of a stove or furnace located sealing furnace shell. According to use the stove, inside the furnace is equipped with different types of heating element, such as resistance, electrode and electron gun. Metal smelting in a crucible furnace, vacuum furnace of some manipulator with active casting equipment and loading. Vacuum system is mainly composed of vacuum pump, vacuum valves and vacuum gauge, etc.

What factors affect the vacuum induction furnace temperature to transfer

What factors affect the vacuum induction furnace temperature to transfer

Based on the temperature field distribution equations, the internal heating type vacuum furnaces throughout the distribution of temperature field, the first depends on several aspects. The data evenly into the thermal conductivity of data of uniform density P and uniform than hot melt. Affect the vacuum furnace temperature outward transfer elements, include the following three points:
A, the strength of the furnace heating element, in the planning, first choose inner heat source. Internal heat source heating, temperature, from inside to outside. The strength of intrusive directly affect the temperature distribution in the furnace condition. By (5) type to be able to see, when the higher the heat inside roar must point the higher the temperature, temperature difference (delta T) must be together to spread area (r). So, in the process of produce practice, i.e. after manipulation of the core of appearance load furnace core power manipulation of the temperature distribution in the furnace.
Second, the response of material from the furnace core intervals (delta r), as the core power will be punctual, that is the strength of the inner heat source will be punctual, and interval of furnace core is more far the response of materials, the lower the temperature, can not reach the required temperature response. As close to the furnace core intervals, the higher the temperature, the more conducive to echo.
Third, the burden of the cooling function, burden of heat dissipation function better, internal heat to the faster loss, heat loss in the reaction of material, easily causes must point temperature drop. But if echo is expected to heat dissipation function owe good, heat is needed for convergence, allows heat to pass time longer, is advantageous to the reaction of material to absorb heat and response to, progress must point temperature. Should have under the condition of high vacuum (pa) 4 ~ 13, reaction temperature 1200 ℃ or so, core temperature will soon be able to reach the required value, thus the length of the response time depends on the reaction of material thickness, namely the interval of reaction furnace core periphery expect furnace insulation layer. Can after planning furnace scale manipulation of the power supply.

Nine items that should pay attention to maintenance of vacuum induction furnace

Nine items that should pay attention to maintenance of vacuum induction furnace

Yet how many people know that vacuum induction furnace correct maintenance method? The following is to detailed introduction:
1, after the work, needs to keep in vacuum induction furnace 133 pa vacuum.
2, there is dust or not clean inside the equipment, application of alcohol or gasoline wet silk cloth to wipe clean and dry.
3, sealing parts, parts disassembling, application of aviation gasoline or alcohol to clean, dry vacuum grease on besmear after reload.
4, equipment outside surface should often wipe, clean clean. The same is true of the use of vacuum tempering furnace.
5, electric control system of electric connection should be kept clean, fastening, in each furnace should check before fastening electric connection.
6, should check the insulation resistance of the furnace, when insulation resistance less than 1000 euro, should carefully check the electric heating element, electrode and isolation layer thermal resistance, etc., and troubleshoot rear can furnace.
7, mechanical transmission parts in accordance with the requirements of general equipment lubricating oil or oil change on a regular basis.
8, vacuum unit, valves, instruments and meters and other accessories, all press products are vacuum furnace maintenance with the specifications.
9, vacuum furnace maintenance should be a power outage maintenance, in the case of charged maintenance, must ensure that the operating personnel, maintenance personnel and equipment is absolutely safe.

The electrical principle of intermediate frequency induction furnace

The electrical principle of intermediate frequency induction furnace

In molybdenum powder before choose coal furnace and electric resistance furnace drying more boring, with the skills and the advance of science and technology, foreign molybdenum powder choose sense of intermediate frequency furnace more boring.
The electrical principle of intermediate frequency induction furnace. Will three-phase medium frequency alternating current (ac) by 6 thyristor components of three-phase bridge type all control for a dc rectifier circuit, through the flat wave reactor, into a stable dc current source, then through single phase inverter bridge, make dc current inverter can surely frequency single-phase medium frequency current, supply induction coil, intermediate frequency furnace in order to counter the reactive power of the coil, at the two ends of the coil to counter capacitance in parallel, it constitutes the LC vibration circuit.

The safe operating point of induction heating furnace

The safe operating point of induction heating furnace

1, high frequency, intermediate frequency and power frequency induction heating operation, should pay special attention to prevent to get an electric shock. Before work, the operator should wear protective equipment of the insulation, the preparation of the floor should be laid rubber pad, and pay attention to prevent leaking cooling water spilled on the floor and other places.
2, equipment internal insulation must be good, reliable grounding, equipment should be installed protective fence around, after being closed high voltage switch, no one shall be within the scope of the dangerous activities. Preparation to bright light, install exhaust equipment, keep ventilated, indoor temperature control in 18-35 ℃.
3, before starting the equipment must be cooling water, the water pressure is 1.2 ~ 2 ATM ATM (1 = 0.1 MPa). Sensors in the load artifacts, all closed the door of the cabinet.
4, according to operation procedure, comply with the provisions of the filament preheating preheating time; When heated to maintain the current bias for screen flow (Yang) value of 15% one 20%, in order to make the oscillator output efficiency is highest; Circuit of the condenser cooling water outlet temperature should be below 35 ℃, the cooling system should be less than 55 ℃, stop working after about 10 ~ 15 min to stop water supply.
5, high-frequency equipment will produce radiofrequency radiation effect, after more than a certain amount, can produce adverse effect on the human body, the radiation source of reason to the equipment such as high frequency transformer, coupling capacitor and inductor shielding measures should be taken to prevent the high frequency electromagnetic leakage. Should guarantee the working environment of the radiation intensity control within the prescribed scope (electric field intensity E 20 v/m or less, magnetic field intensity H 5 a/m or less).
6, regular replacement of capacitor in the transformer oil, the longest do not exceed half a year, and check whether "band" in good contact.
7, the use of 200 ~ 300 h after to wash the oscillation tube anode with 10% hydrochloric acid solution on the scale, until clean (but not with a knife); Then rinse with warm water, and assembly.
8, the equipment should be kept clean, dry, of the anomalous phenomenon occurred shall be immediately cut off the power supply, check and troubleshoot rear can continue to work. High frequency equipment should be the specialist is responsible for the maintenance, the maintenance should be first discharge, then maintenance, to ensure personal safety.