Vacuum sintering furnace: 2017

2017年5月25日星期四

What is the modern feature of a vacuum furnace?

The universality of the vacuum furnace application is obvious to all, and many people wonder what makes him so valuable. In fact, there are many advantages you don't know about vacuum furnaces, and today we'll talk about its modern features.
Easy to install and operate, easy to understand and easy to understand.
Small size and light weight, the area is less than one square meter.
3.24 hours of continuous smelting capacity, which is strong in yield and high in value.
It is convenient to change different weights, different materials, different furnace ways of furnace and meet different production requirements.
Using the ultra-small medium frequency induction heating power supply, the use of the former medium frequency power supply is completely replaced.
Heat, heat, and temperature evenly.
The medium frequency magnetic field has a magnetic mixing effect on molten metal to make the finished product more uniform.
The melting time of the furnace is 20-30 minutes, which greatly improves the efficiency of production.
The capacity of the furnace is increased, and the quality of the product produced in the same time unit is several times higher than before.

2017年5月18日星期四

Is there any importance in vacuum sintering furnace fittings?

Vacuum sintering furnace consists of furnace body, furnace lining, burning device and drive parts, these are the necessary structure of vacuum sintering furnace, and in addition to these structures, vacuum sintering furnace and some accessories, vacuum sintering furnace accessories what then?
There are many kinds of vacuum sintering furnace parts, including pulse gas fuel oil burner, hot gas burner and assembly type thermocouple. So are these vacuum furnaces important? Today, suzhou qiaoshi vacuum furnace co., LTD. Briefly introduces these vacuum sintering furnace fittings.
Pulse gas fuel oil burner
The dual fuel burner allows all kinds of industrial gas and viscosity to burn well below 100 SSU. Switching from one fuel to another does not need to be removed or added to any element.
Hot gas burner
In dirty of unwashed heat generator gas as a fuel, combustion air by rotating the gushing and gas mixture flow more shares mixing and combustion stability, flame is shorter, easy to form the high temperature combustion zone, its heating ability is stronger. Because of the high air pressure than the gas pressure, telling blows air can according to the proportion of the gas suction, therefore, have certain ability to automatically adjust the burner itself.
The assembly type thermocouple
Fabricated thermocouple is commonly used in industry for measuring temperature transmitter, usually, and display instruments, electronic regulator and the recording instrument, it can be measured directly in the production of a variety of from 0 to 1800 degrees Celsius between the temperature of the liquid, gas and steam, such as medium, and the surface temperature of the solid. Fabricated thermocouple is usually by fixing device, temperature sensing element and the connection box parts together, can choose the models which are the main types: the S type, E type, type B, and K type.

2017年5月17日星期三

Vacuum sintering furnace is used for sintering in vacuum

The vacuum furnace product has the following characteristics: the vacuum furnace structure is reasonable, the heat is uniform, reliable insulation and temperature measurement, the temperature of the furnace is good. Reasonable heating structure, high quality material, guarantee the uniformity of furnace temperature under vacuum. The precision of temperature control is guaranteed by the domestic and international brand temperature control elements.
Vacuum sintering furnace is used for vacuum of vacuum sintering furnace, vacuum furnace for sintering structure must be reasonable and the loading area should be appropriate, to make good balance, vacuum sintering furnace temperature sintering material quality can be high. Vacuum furnace sintering furnace used for metal powder products, photoelectric element, ha rd alloy, magnetic alloy, ceramic powder materials, carbon fiber, carbon materials and its rare and refractory metal materials of high temperature sintering, have dewaxing function at the same time.
Vacuum sintering furnace equipment arrangement
Compact and reasonable, the area is small. Advanced automation control, comprehensive PLC automatic control and protection of water, electricity, gas system, PLC to realize the safety chain, has overtemperature, sensors, broken accidentally, water pressure, furnace pressure, water flow, water temperature higher sound and light alarm. Resistance heating is adopted in the vacuum furnace, high precision of temperature control, no noise, no pollution to the power grid, high power utilization. The cold and high temperature sections are controlled by different temperature control elements, and the automatic switch is automatic. The cooling is cooled by natural cooling, and the cooling can be cooled by charging the inert gas.

2017年5月15日星期一

How to maintain the vacuum sintering furnace

A vacuum sintering furnace is a device that reduces the shape of an object or substance by heating it at high temperatures.It could reduce objects in space, grain boundary gradually gathered, solid particles gradually connection, so as to realize the density increases, the decrease of the object of the polycrystalline sintered body equipment.
How should vacuum sintering furnace be maintained in peacetime?
1, the import and export of the equipment, the driving bunker must ensure the clean and clean.
The cleaning of the discharge mouth will clean up the organic matter.
The main body of the chamber is to see if the pores are blocked.
If there is organic material on the lamp tube, it can be cleaned with non-woven or alcohol cotton.
The diagonal mesh band will be able to be softened and then scooped out when it is delivered 120.
The belt of the thimble can be polished with sandpaper to prevent damage to the battery.

2017年4月27日星期四

Vacuum sintering furnace what procedures?

Vacuum sintering furnace is mainly in a vacuum or protective atmosphere conditions, by using the principle of intermediate frequency induction heating, let the hard alloy cutter and a variety of metal powder compacting sintering of implementation of a complete set of equipment, is specially designed for hard alloy, ceramic and metal industrial production and design, it is in the face of the heated object in vacuum environment protective sintering furnace, vacuum sintering furnace heating mode is very much, have induction heating, resistance heating and microwave heating and so on.
Based on rich experience of vacuum sintering furnace operating personnel to the manufacturer's recommendations, some industrial manufacturers will develop some vacuum sintering furnace operational procedures, so what is the vacuum sintering furnace operation procedures? Actually, these regulations is before operating the equipment, check equipment above some of the commonly used spare parts if there are any problems, in order to avoid an accident, is mainly in order to ensure the safety of operating personnel and improve the working efficiency of the equipment.
1, vacuum sintering furnace must be full of the inside of the reservoir water, and water there can be no impurities. Start the pump, intermediate frequency power supply, furnace cooling system and vacuum furnace sensor circulation normal, and adjust the water pressure, its control above the value of the rules.
2, check the power of the vacuum pump system, vacuum pump oil is already inside the oil seal the centerline of the observation hole. Check after the artificial the rotation of the vacuum pump pulley, if there is no exception, can under the condition of the closing butterfly valve, vacuum pump.
3, check the internal condition of vacuum sintering furnace, furnace body within the level of health, the induction coil, better insulation, vacuum sealing tape to have certain elasticity, and size to be qualified. Check the vacuum sintering furnace of flexible lever handle is started.
4, after the requirements of the vacuum degree reach, start frequency, adjustment of intermediate frequency power, according to the relevant provisions of sintering operation. After sintering, the stop frequency, press the stop frequency conversion switch, inverter to stop working, the intermediate frequency power supply points total brake brake and power off.
5, from inside the furnace of the observation hole observation, in the event of a stove or furnace black, then turn off butterfly valve, vacuum pump and disconnect current of vacuum pump, and then use tap water to cooling and induction coil, furnace, finally to stop the pump.

2017年4月6日星期四

Vacuum atmosphere furnace equipment must be used under what conditions

1. Vacuum atmosphere furnace equipment must be used in the following conditions:
1) indoor use, environment temperature in - 10 ~ 40 ℃;
2) no more than 1000 meters above sea level;
3) environmental relative humidity less than 85% RH;
4) the environment without conductive dust, inflammable and explosive objects and gases, and serious damage to metal corrosive gas;
5) no vibration and turbulence,
2. Check the circuit connection parts contact are in good condition.
3. The proper use of standardized operation, the highest temperature of 1200 ℃ can't use for a long time, overheating, overload operation of avoid by all means, keep a sudden rise in moderate quench the blackout, so as not to damage the furnace and heating wire.
Contains 4. It is strictly prohibited to high moisture, volatile matter, organic matter and other artifacts directly into the furnace heat treatment.
5. It is strictly prohibited to high temperature melting material such as metal, glass, in the absence of crucible loaded into the furnace under the condition of heat treatment.
6. Always check the electric heating element, in case of aging, fracture, short circuit should be timely repair and replacement.
7. Often remove the scrap material in furnace dust particles and fallout, etc, in order to keep clean inside the furnace.
8. It is strictly prohibited to overload the use of this equipment, so as not to cause damage of equipment structure.

2017年3月29日星期三

Excellent performance of vacuum 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 surface oxidation, no decarburization, small deformation, the mechanical performance is good. Use the vacuum furnace smelting metal 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 smelting and magnetic materials, electrical materials of high strength steel, stainless steel, tool steel and die steel, heat treatment.
Before and after vacuum furnace appeared in the 1930 s. In 1927 the United States made electrical material vacuum annealing furnace. Vacuum since 1953 arc furnace power consumption in industry have been used for melting titanium sponge. Before and after the '50 s vacuum induction furnace is widely applied in industry. In 1960 the United States developed oil quenching vacuum furnace.

2017年3月28日星期二

Vacuum atmosphere furnace equipment must be used under what conditions

2017年3月23日星期四

Excellent performance of vacuum furnace

2017年3月21日星期二

The characteristics of sintering furnace atmosphere

Atmosphere sintering furnace by using the most advanced temperature measurement, temperature control technology, intelligent techniques, new materials and furnace design, suitable for more atmosphere of all kinds of solid high temperature synthesis, calcining, roasting, sintering, ashing, incineration, melting and heat treatment, etc., has been adapted for use by the world first-class laboratory. The inner loop water cooling system, digital flow monitoring and control system; Using high-performance medium frequency contactor of furnace, automatic conversion; Water, electricity, gas comprehensive PLC automatic control and protection system. The characteristics of sintering furnace atmosphere:
1, atmosphere sintering furnace using special industrial microwave source, can be continuous and stable operation;
2, microwave stepless adjustable output power, achieve precise temperature control curve of temperature;
3, atmosphere sintering furnace adopts imported raytek infrared thermometer, direct measurement of the sample temperature, data are true and correct;
4, special crucible and insulation structure choice, for material non-polluting;
5, can process various microwave properties of materials, excellent versatility;
6, atmosphere sintering furnace gas channel is equipped with two road, fine controllable atmosphere;
7, real-time temperature curve, according to realize the dynamic monitoring of the heating process;
8, the microwave shielding atmosphere sintering furnace safe and reliable design, multiple anti leakage protection.
9, equipped with embedded microcomputer control system, provide manual and automatic, constant temperature three operating modes and are free to switch.

2017年3月3日星期五

How to pick a good vacuum furnace?

Vacuum furnace varieties have a lot of, including vacuum furnace pressure type vacuum furnace, vacuum furnace, high pressure and high temperature type tubular vacuum furnace, etc., equipment, the corresponding use is also different, so how to choose a good vacuum furnace? Suitable vacuum furnace?
From the perspective of process, the design of vacuum furnace will make a good product. Vacuum heat treatment process can improve the service life of the parts, is the contemporary advanced heat treatment process, it has been generally recognized by the people.
Vacuum furnace parts heat treatment was conducted under the vacuum state, and completely avoids the problem of oxidation, the parts after vacuum heat treatment is more stable and reliable performance, has provided the safeguard for high precision workpiece.
When we were in the use of vacuum furnace, heat treatment process will face some problems in the vacuum furnace can't complete, investigate its reason, generally there are two aspects: one is the vacuum furnace manufacturer in accordance with the standards of vacuum furnace production of vacuum furnace, although the technical parameters of qualified, but not yet fully in the process of production of the vacuum furnace system to consider the heat treatment process, resulted in the vacuum furnace and heat treatment process parameters do not match. Second, vacuum heat treatment process was flawed, cannot achieve the desired results. In this respect we put the heat treatment process and vacuum furnace manufacturing organic unifies in together, the effect is obvious. Through understanding the process and details of each process, design and manufacture for vacuum furnace and heat treatment process and perfect fit, solved the trouble back at home for vacuum furnace users.

2017年2月27日星期一

Vacuum pressure sintering furnace

In vacuum pressure sintering furnace this equipment, sintering material under high temperature is also subject to mechanical stress and the effect of vacuum, can be used in the sintering density after casting products. General powder material filling in the graphite mold, mechanical pressure by 700-1500 mn/m3, and heated to 2500 ℃ in the vacuum. Mold by direct current heating, indirect heating.
Vacuum pressure sintering furnace is mainly used for sintering is the density of the material with high temperature gas reactions billet, such as oxide, carbide and boride gas after sintering material can reach very high density, general density is greater than the theoretical value of 95%, and with high purity. Graphite resistor and graphite mould in the vacuum operation of weight loss is minimal. Vacuum hot pressing sintering is at the same time in the compaction process and utilization of high pressure, temperature and time, and many other parameters to control the quality of the sintered body.

2017年2月23日星期四

The maintenance of sintering furnace

1. The new furnace and lining refractories of replacement should be done after drying process. Oven to falling in to rise in stages. At the beginning of the dry, low temperature, long time, when the stove is cold by warming, furnace material of high moisture. In less than 400 degrees Celsius, to open the oven door discharge water vapor. When up to 700 ℃ heat preservation for a period of time. In order to make the temperature of the furnace body evenly.
, mesh belt furnace, the furnace temperature has risen to 400 ℃, shall run for a period of time, for oxidation treatment, improve the life of the net belt.
2. The low melting point impurity in the compact (S, Pb, zinc, etc) to the chamber of a stove or furnace material and heating elements are produces erosion, in order to improve the service life of the furnace, should be regularly purification furnace, presintering area, in particular, try to avoid in the powder metallurgy ingredients add S elements, such as to avoid pollution furnace and heating elements.
3. Regularly clean the stove, in using carbon monoxide or he carbon gases, could be breaking from the decomposition of hydrogen compounds to the carbon, this part of the carbon deposition on the furnace wall and heating elements, it will pollution stove, refractory erosion and damage the electric heating yuan
, so need to regular cleaning the stove.
4. Keep the body clean, regular cleaning furnace of iron oxide, gravel, zinc oxide and other debris.
5. Check the electric heating element and wire connection, prevent poor contact arc.
6. Due to the need of furnace operation under the low dew point, so the leak bolted flange sealed parts regularly
Detection.
7. Do not insert with grease tray in furnace, grease into Shanghai in one thousand will make a sharp increase in dew point affect normal operation.
8. The high temperature, don't play to open the door for a long time, in order to prevent the air into the furnace, damage the electric heating element.
9. No overtemperature operation.

2017年2月21日星期二

The characteristics of the vacuum furnace temperature field formed

Vacuum furnace heating elements generally assumes the circular layout. Relative average furnace, vacuum heating only the heat transfer of radiation, conduction and convection; The vacuum heat conduction, convection and radiation, three ways of convection and conduction depending on the pressure and with ordinary furnace (normal pressure).
Pressure is less than 1 x 105 pa (absolute pressure, ordinary furnace approximation of working pressure), the convection and conduction effect is less than ordinary furnace; Working pressure close to the vacuum (pa) 2, the convection and conduction effect basic does not exist, workpiece temperature is slow, especially below 600 ℃ heating, heating more slowly, the temperature of the workpiece temperature thermocouple temperature control has certain hysteresis.
The vacuum furnace temperature uniformity measurement is different from ordinary furnace, when measuring the need to guarantee the normal work of the furnace under the condition of vacuum and pressure rise rate, can correct determination of furnace temperature. Because, unlike ordinary furnace, vacuum furnace heat transfer of actual temperature measurement process shows that the control thermocouple temperature at the beginning of the heat preservation and the effective heating area measuring thermocouple temperature difference is bigger. In vacuum condition, temperature deviation in the normal heat preservation time of the effective heating area can reach + / - 5 ℃, meet the needs of the process.

2017年2月6日星期一

Little knowledge of vacuum sintering furnace

Vacuum sintering furnace in the furnace chamber within a particular space using vacuum system (by the vacuum pump, vacuum measuring device and vacuum valve components such as carefully) substances out of furnace cavity part, making furnace chamber pressure is less than a standard atmospheric pressure, so as to realize a vacuum furnace cavity space, that is the vacuum sintering furnace.
1) completely eliminates the oxidation and decarburization on the surface of the workpiece during the process of heating, clean surface without metamorphic layer can be obtained. That only when grinding mill side of cutting tools (such as twist drill grinding after make direct exposure to edge) of the decarburization layer of the grooved surface cutting performance greatly improved relations.
2) on the environment pollution-free, "three wastes" treatment is not required.
3) obviously improve the temperature measurement, the monitoring precision. Indicated value of thermocouple temperature and furnace temperature reached plus or minus 1.5 ° c. But in different parts of a large number of artifacts in the furnace temperature difference is bigger, if USES the rarefied gas forced circulation, can still be controlled within + / - 5 ° c temperature difference.
4) high degree of mechanical and electrical integration. Increase in the temperature measurement and control accuracy, on the basis of the workpiece moving, pressure adjustment, power adjustment, etc all can set programming in advance, according to the steps to implement the quenching and tempering. 5) energy consumption significantly below the salt bath furnace. Modern advanced vacuum furnace heating chamber is made of high quality insulation material of insulation walls and barriers, electric energy can be highly focused on indoor heating, energy saving effect is remarkable.

2017年1月16日星期一

Vacuum furnace large analytical performance advantage is obvious

Vacuum furnace, just as its name implies, it operates within the furnace is in a vacuum, so to avoid the defect of the many other each type coal stove.
1, completely eliminates the oxidation and decarburization on the surface of the workpiece during the process of heating, clean surface without metamorphic layer can be obtained. That only when grinding side grinding tool cutting performance greatly improved relations.
2, on the environment pollution-free, "three wastes" treatment is not required.
3, obviously improve the temperature measurement, the monitoring precision. Indicated value of thermocouple temperature and furnace temperature reached plus or minus 1.5 ° c. But in different parts of a large number of artifacts in the furnace temperature difference is bigger, if USES the rarefied gas forced circulation, can still be controlled within + / - 5 ° c temperature difference.
4, high degree of mechanical and electrical integration. Increase in the temperature measurement and control accuracy, on the basis of the workpiece moving, pressure adjustment, power adjustment, etc all can set programming in advance, according to the steps to implement the quenching and tempering.
5, significantly below the salt bath furnace energy consumption. Modern advanced vacuum furnace heating chamber is made of high quality insulation material of insulation walls and barriers, electric energy can be highly focused on indoor heating, energy saving effect is remarkable.

2017年1月9日星期一

Vacuum furnace production process can be divided into two broad categories

Vacuum furnace production process can be divided into two broad categories: electrolytic method and thermal reduction process, the former USES the vacuum furnace chloride as raw material, the latter using dolomite ore as raw material, etc. Using electrolytic process conditions is the place where power rich and low price. At present only in qinghai and vacuum furnace factory using electrolysis refining vacuum furnace. Under the influence of raw materials, and other factors, our country most of the vacuum furnace factory adopts silicon thermal vacuum furnace smelting reduction method. The method using ferrosilicon as reducing agent, this method is compared with the other vacuum furnace smelting process, the technological process is simpler, less infrastructure investment, factory fast; The production process does not produce harmful gases, slag (2 ca0 si02) for production of cement or fertilizer raw materials; Silicon metal vacuum furnace thermal vacuum furnace smelting process of high purity, large economic benefit. But the size of the reduction pot was numerically simulated small, single canned capacity is low, productivity is low, the thermal efficiency is not high, continuous production, labor intensity is big. Tank outside the solid, liquid or gaseous fuel heating, smoke take away a lot of heat, not only greatly reduces the heat utilization rate, and incomplete combustion of smoke caused serious pollution to the environment.

2017年1月3日星期二

Vacuum furnace processing technology rapid development, and expand the application range

According to the characteristics of the vacuum brazing process and technical requirements, based on the 3 room of PLC technology to achieve the continuous vacuum brazing of integrated automation system, discusses on the principle of the vacuum brazing brazing, 3 rooms continuous brazing furnace system function, technological process, the function of PLC. With the development of science and technology, make the vacuum heat treatment technology is developing rapidly, expanding the range of application. Be processed materials from titanium, niobium alloy, high temperature alloys, magnetic material to the tool steel, die steel, high speed steel, alloy structural steel, bearing steel, alloy tool steel, spring Huang Gang, etc. The application of the vacuum heat treatment at home and abroad focus on aviation, spaceflight, auto, tools, mold and other industries, and in the automotive industry in recent years, the application of the rapidly, especially in vacuum furnace. And with the advent of 3 rooms the continuous vacuum soldering furnace, realize the continuous brazing process, for enterprises to save production costs, improved the production efficiency, optimize the production process.

订阅：博文 (Atom)