In order to make a variety of mechanical parts and processing tools to obtain good performance. Or a variety of metal materials to facilitate processing, often need to change their physical. Chemical and mechanical properties, such as magnetic, corrosion resistance, high temperature oxidation resistance, strength, hardness, plasticity and toughness. It is necessary to change the physical, chemical and mechanical properties of metals and alloys by changing the internal structures of the metals and alloys by heating at a certain temperature, holding for a certain time and cooling at a certain speed during machining. This method is called heat treatment. In this work, workers often contact equipment and metal parts, it is necessary to carefully master the relevant safety technology to avoid accidents.
(A) the main heat treatment process heating equipment. Heat treatment process in the main equipment is the furnace, can be divided into two types of electric furnace furnace.
Fuel Heat, such as coal stoves, oil stoves and gas furnaces, are produced by combustion of solids, liquids and gases. They rely on combustion directly to the heat energy, most of the primary energy, value of the economy, low consumption, but easy to make the surface decarburization and oxidation. Commonly used in the general requirements of the heating parts and materials heat treatment, such as tempering, normalizing, annealing and quenching water.
2. Electric furnace. To electricity as heat energy, that is, secondary energy. According to their different heating methods, is divided into resistance furnace and induction furnace. According to the different heating parts and materials, according to process requirements should be equipped with different forms of electric heating furnace.
(1) resistance furnace. Mainly by the resistor as a heating element and electric furnace. According to the requirements of the heat treatment process, can be annealed, normalizing, tempering, quenching, carburizing oxidation and nitriding, but also solve the problem of non-oxidation.
(2) induction furnace. Through the induction of electromagnetic induction, the workpiece to produce induced current, the workpiece quickly heated. Induction furnace heating is an advanced method in heat treatment process, mainly used for surface heat treatment quenching, and later gradually expanded for normalizing, quenching, tempering and chemical heat treatment, especially for some special steel and special work requirements Of the workpiece application more.
(B) general safety requirements for heat treatment operations
1. Before the operation, first familiar with the heat treatment process and the equipment to be used.
2. Operation, must wear the necessary protective equipment, such as uniforms, gloves, protective glasses and so on.
3. Do not place any object between the heating and cooling equipment.
4. Mixed carburizing agent, sandblasting and so on in a separate room, and should be provided with adequate ventilation equipment.
5. Equipment Hazardous areas (such as electric furnace power leads, bus bars, conductive rods and transmission, etc.), should be barbed wire, fence, board and other protection.
6. All tools for heat treatment shall be placed in a coherent manner and shall not be allowed to use cracked or unsuitable tools.
7. The entrances and exits of the workshop and the access roads in the workshop shall be unimpeded. In the heavy oil furnace nozzles and gas stoves around the nozzle, fire extinguishing flask should be placed; workshop should be placed fire extinguishers.
8. After heat treatment of the workpiece, do not be used to touch, so as to avoid burns.
(C) heat treatment equipment and process safety operation
1. The operation of heavy oil furnace (including gas stove), the equipment must always be checked, tubing and air pipe shall not be oil, gas leakage, the bottom should not have heavy oil. If it is found that the oil furnace is not working properly, must immediately stop the combustion. Do not stand burning furnace stove mouth, so as not to burn the body flame. In the event of a sudden stop of the delivery of air, the heavy oil delivery pipe should be quickly closed. In order to ensure safe operation, open the heavy oil nozzle, you should first release the steam or compressed air, and then release the heavy oil; close the nozzle, you should first close the heavy oil pipe, and then turn off the steam or compressed air pipe.
2. A variety of resistance furnace in use, the need to check the power connector and the power cord insulation is good, we must always pay attention to check the open and close door automatic power-off device is good, and the power distribution cabinet on the work is normal.
The liquefied gas used in the non-oxidizing heating furnace is stored in the cylinder in the state of compressed liquid, and the ambient temperature of the cylinder should not exceed 45 ℃. Liquefied petroleum gas is flammable gas, the use must ensure that the airtight pipeline to prevent accidents and fire. Because of the high content of carbon monoxide in the endothermic gas without oxidative heating, special care should be taken to ensure good indoor ventilation and to check the sealing of the piping. When the furnace temperature is lower than 760 ℃ or combustible gas and air to a certain mixture ratio, there is the possibility of explosion, this start and shutdown in the more attention should be paid to safe operation, the most reliable way is before the ventilation and shutdown With inert gas and non-flammable gas nitrogen or carbon dioxide sweep furnace and the furnace chamber.
3. Operation Salt bath furnace should be noted that the electrodes in the salt bath furnace electrodes shall not be placed on any metal objects, so as not to short-circuit the transformer. Before operation, check the operation of the ventilator and the exhaust pipe, and check the level of the molten salt in the crucible, the liquid level should not exceed 3/4 of the volume of the crucible, and the electrode bath furnace will be in the working process. Many oxides are deposited on the bottom of the furnace and these conductive materials must be removed regularly.
The use of salt furnace, it should be noted that more than a certain temperature of nitrate occurs fire and explosion. Therefore, the temperature of the nitrate salt should not exceed the maximum permissible operating temperature. In addition, special attention should be given to the nitrate solution can not be mixed with charcoal, wood chips, carbon black, oil and other organic substances, in order to avoid the combination of nitrate and carbon to form explosive substances, causing an explosion.
4. To carry out liquid cyanidation, pay special attention to prevent cyanide poisoning.
5. For high-frequency current induction heating operation, special attention should be paid to prevent electric shock. Floor between the operations should be laid rubber pads, and pay attention to prevent the cooling water spilled on the floor and other places.
6. For magnesium alloy heat treatment, should pay special attention to prevent the furnace "running temperature" caused by magnesium alloy combustion. When the occurrence of magnesium alloy on fire, smelting alloy should be immediately with the flux (50% magnesium chloride + 25% potassium chloride + 25% sodium chloride melting mixed disc broken use) to cover the magnesium alloy to extinguish, or special In the extinguishing of magnesium powder fire extinguisher to extinguish. In any case, absolutely can not use water and other ordinary fire extinguishers to extinguish, or will cause a more serious fire accident
7. In the oil quenching operation, should pay attention to take some cooling measures, so that the quenching oil tank temperature control in the 80 ℃ below large-scale quenching oil quenching should pay special attention. Large oil tank should be set up accident back to the oil pool. In order to keep the oil clean and to prevent fire, oil tank should be installed slot cover.
8. Correct the work of the work site location should be appropriate to prevent the collapse of the broken pieces of the workpiece, if necessary, should be installed in the appropriate location security baffle.
9. Hollow parts without ventilation holes are not allowed to be heated in a salt bath furnace to avoid explosion. Work with blind holes in the salt bath heating, the orifice must not be down, so as to avoid gas expansion will salt spill wounding. Pipe fitting hardening, the nozzle should not be toward themselves or others.
      Zhangjiagang City Ka Wah Furnace Industry Co., Ltd. is a collection of scientific research and development, manufacturing and sales services as one of the high-tech enterprises in Jiangsu Province. Our products are mainly used in metallurgy cold rolling industry, seamless steel pipe industry, high pressure cylinder industry, automobile engine industry, casting and forging industry, nonferrous metal heat treatment and other industries. The company's main products are: strong cycle of high hydrogen, hydrogen bell-type strong cycle of bright annealing furnace, continuous annealing furnace, metal heat treatment industrial furnace, skim line, color plate line, hot dip galvanizing line, tin line, (Copper) tube heat treatment production line, step-by-step high-pressure gas cylinder heat treatment production line, roller-type high-pressure gas cylinder heat treatment furnace, high-pressure gas cylinder heat treatment furnace, heat treatment furnace, Horizontal multi-row curing furnace and large-scale desktop heat treatment furnace. There are natural gas, liquefied gas, hot gas, cold gas, electric heating five series of low-power furnace, respectively, nitrogen, ammonia decomposition and hydrogen protection atmosphere. Production equipment supporting the main metallurgical cold-rolled, non-ferrous metal processing, building materials components, standard parts and other industries, some products exported overseas, large-scale furnace also supporting foreign well-known enterprises.
    Ka Wah Furnace has accumulated years of production history and rich experience in the design and manufacture, strong technical force, with a full range of large-scale processing equipment and advanced detection technology and equipment, is the industry with large-scale professional heat treatment equipment manufacturer, Is the ISO9000 quality system and 14000 environmental quality system certification enterprises.
Ka Wah Furnace in the output of sophisticated equipment at the same time, with great concentration to create service brands, in good faith and professional service concept, the maximum to meet customer needs. The company aims to energy efficient, clean environmental protection heat treatment equipment, and guide the industry trend, improve the level of industrial technology.