vacuum equipment

Vacuum pumping of vacuum pumps mainly depends on the water-ring liquid seal in the pump body. The water-ring liquid seal determines the pumping rate and vacuum degree of the pump. Early water-ring liquid seals were nourishing flow. There are some problems in process control, economic operation and environmental protection of direct row. When C02 gas is sucked, industrial water can not be used to prevent scaling of equipment and pipelines. In addition, some enterprises have acid corrosion and Cl-corrosion in the operation system of vacuum pumps. Stainless steel lining and desalted water are used in the selection of pump body. (2) In addition, the maximum working fluid volume of 12 vacuum pumps is 155 m3/h at the same time. Considering economic operation and environmental protection, working fluid must be recycled. How to ensure the circulation of working fluid and Control, through demonstration, a feasible scheme is finally determined, that is, for the first time, four va...

Vacuum quenching technology is becoming more and more popular, but at the same time, its problems are pointed out. One is the evaporation of alloying elements such as Cr and Mn, and the surface abnormal structure produced by vacuum evaporation of Cr from heat-resistant fixture to workpiece. The countermeasures are taken. It is to reduce the vacuum and introduce control gas into the furnace. Secondly, the problem of insufficient cooling capacity is that for the SKH51 die, the pressure nitrogen cooling of 5-6 Bar and the pressure nitrogen cooling of 20 Bar for the SKD6l die-casting die are nearly solved. Third, the problem of quenching deformation. Vacuum quenching and small quenching deformation are its commodity characteristics, but we all know that this is a misunderstanding. Although the deformation is small, it is also tending to improve the furnace structure to reduce quenching deformation recently. Fourth, oxidation coloring problem, although the workpiece can actu...

Vacuum heat treatment, that is, the combination of vacuum technology and heat treatment, refers to the combination of all the parts of the heat treatment process under vacuum. China divides vacuum into low, medium, high and ultra-high vacuum. At present, most vacuum heat treatment furnaces have a working vacuum of 1.33~1.33×10ˉ³ Pa. Vacuum heat treatment can almost achieve all heat treatment processes, such as quenching, annealing, tempering, carburizing, nitriding, gas quenching, oil quenching, nitrate quenching, water quenching, etc. in the quenching process, vacuum brazing, Sintering, surface treatment, etc. The vacuum heat treatment furnace has high thermal efficiency, can realize rapid temperature rise and temperature drop, can realize no oxidation, no decarburization, no carburization, can remove the phosphorous chips on the surface of the workpiece, and has the functions of degreasing and degassing, thereby achieving the effect of surface bright pu...

Industrial furnace is a kind of thermal equipment which uses the heat of fuel combustion or energy conversion to heat materials or workpieces in industrial production. Generally speaking, boilers are also industrial furnaces, but it is customarily not included in the scope of industrial furnaces. The structure of industrial furnace, heating process, temperature control and atmospheric environment directly affect the quality of finished products. In forging furnace, increasing the heating temperature of metals can reduce the resistance of deformation, but too high temperature will lead to grain growth, oxidation or overheating, which seriously affects the quality of the workpiece. During the heat treatment process, if the steel is heated to a temperature higher than the critical temperature and then suddenly cooled, the hardness and strength of the steel can be improved. If heated below the critical temperature, slow cooling can reduce the hardness and improve the toughne...

Notices for Vacuum High Temperature Atmosphere Furnace What are the precautions for the vacuum high temperature atmosphere furnace? The following is a detailed description of the eleventh characteristics of the vacuum high temperature atmosphere furnace by Liyu Xiaobian. 1. Except for those who want to do experiments, other people should not stay in the high temperature furnace tube area. 2. When the experiment is finished, if no one continues to use it, please turn off the special gas, keep N2 flowing, keep the furnace tube at standby temperature, and check if there are other power sources that should be turned off, such as clean hood lights, small electric stoves for boiling acid or other, turn off at will. 3. When dealing with HF, please wear gloves. If you accidentally encounter HF, please flush immediately, add 2% water with calcium gluconate, rub the scratch 15'. 4. Quartz glass products should be used carefully so as not to break and cause serious cuts. 5. Avo...