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Vacuum heat treatment furnace in automobile exhaust gas purifier
The specific role of vacuum heat treatment furnace in the manufacture of automobile exhaust gas purifier
Because the carrier of the automobile exhaust gas purifier is composed of a casing, a gasket, a catalyst and the like. We want them to be grouped together and to purify the exhaust, which involves the union between the components and the union between the catalyst and the components. The vacuum heat treatment furnace is a device that successfully combines various components by utilizing its own advantages.
The specific role of vacuum heat treatment furnace in the manufacture of automobile exhaust gas purifier
(1) The vacuum heat treatment furnace is heated under vacuum, and the vacuum has the functions of preventing oxidation and degassing.
a. Anti-oxidation function makes the surface of the workpiece free from decarburization and carburization, and can remove the phosphorous and rust on the surface of the workpiece. Purifying the surface of the workpiece allows the solder and catalyst to adhere better to the surface of the workpiece, improving the quality of the product.
b, degassing effect. Improve the surface purity of the material and improve the fatigue strength, plasticity and toughness of the material. Thereby improving the mechanical properties and service life of the workpiece.
(2) The heating temperature is high, which can effectively degrease and remove oil, evaporate various impurities, and purify the surface of the workpiece, thereby further improving product quality.
(3) The heating rate in the vacuum heat treatment furnace is controllable, and the temperature deviation in the constant temperature zone is small. It can be heated slowly, so the temperature of each part of the workpiece is balanced, the temperature difference is small, the thermal stress is small, and the deformation amount after molding is small. Can easily match the various standard parts to ensure the product yield and quality. The welding of the traditional process can not only prevent oxidation, but also the temperature of the welded part is too high, so that the temperature difference between the parts of the workpiece is large, and the deformation amount after molding is huge, failing to meet the requirements of the product.
(4) The workpiece in the vacuum heat treatment furnace gradually increases with temperature, the solubility of hydrogen will become smaller and smaller, and the hydrogen permeating the inside of the workpiece will gradually precipitate out, so there is no danger of hydrogen embrittlement in the vacuum heat treatment furnace.
(5) Vacuum heat treatment is controlled by microcomputer, the error rate is small, and the process stability and repeatability are good.
(6) The most important point is that the vacuum heat treatment furnace saves energy, does not need flammable gas, saves raw materials, has low cost, and is suitable for large-scale production.