Purposes: 
 ZRJ3 series of pre-vacuum protective atmosphere furnace belongs to my company an exclusive patent, Patent No.: 200520096581.X, high energy-saving high-precision temperature control well cycle operation vacuum furnace. Mainly used in aerospace, aviation aircraft manufacturing industry, precision parts, light oxidation annealing, as well as the automotive industry, precision machinery manufacturing, precision mechanical parts or forgings bright, no oxidation decarbonization heating, quenching, annealing, tempering heat treatment and spheroidization annealing. Pre-vacuum protective atmosphere furnace can be used in non-ferrous metals industry, copper, brass light oxidation annealing can also be used for aluminum annealing. The product meets the military standard of the Chinese Ministry of Aviation Industry GJB509-98-88I class vacuum protective atmosphere furnace. 

 Structure description: 
 ZRJ3 pre-vacuum protective atmosphere furnace, pit furnace shell is mainly made of steel plate, made of steel welding structure of the furnace. Lining of energy-saving refractory bricks, lining and the furnace shell in 0.6g/mm3 super lightweight beads sandwiched between home silicate fiber felt, filling the gap expansion of the insulating powder is a typical energy-saving furnace lining, saving 30-60%, the use of heating element resistance high temperature resistance the wire 0Cr25A15 or 0Cr27Al7Mo2; resistance wire of up to five years, the vacuum furnace tank 1Cr18Ni9Ti stainless steel plate or import high-temperature stainless steel plate rolling using the automatic protection dense welding, pressed into the testing room by the large X-ray flaw detection test. Lid using stainless steel holding furnace cover, lid panel and the tank with dual water-cooled vacuum rubber seal, pre-installed on the vacuum lid vacuum sealed stainless steel fan above 60KW, temperature uniformity allows the tank, installed in the vacuum furnace panel vacuum interface, sent to protect the atmosphere interface, the vacuum pressure gauge. The lid and the tank furnace can be used to shop driving the vacuum tank hanging out the natural air-cooled or water to force rapid cooling, so that loading and unloading of the workpiece. In order to improve production efficiency, order two vacuum tank alternating continuous operation. 60KW above pre-vacuum furnace into a multi-zone temperature control, warming law of allocation of power. Multiple microcomputer temperature control cabinet, and automatically displays the measured furnace temperature, calculation of heating up the slope of the temperature value and set value, over-temperature alarm and automatic technology curve records. Not given in paragraph 8 of the technology curve, temperature control accuracy of soil 1 ° C, when used as a ball annealing process requires 780 ° C to 680 ° C rapid furnace cooling system, when ordering vacuum furnace hot nitrogen out of the furnace nitrogen rapid cycle then heat to reduce nitrogen temperature cold nitrogen into the tank after the fast-cooling circulation system.