A basic overview of vacuum heat treatment furnace

A basic overview of vacuum heat treatment furnace

Two professional vacuum heat treatment of vacuum technology and heat treatment technology that combines an integrated, refers to the whole and part of heat treatment process in a vacuum. Our country could be divided into low, medium and high vacuum and high vacuum. Vacuum heat treatment can achieve almost all heat treatment process, such as quenching, annealing, tempering, carburizing, nitriding, during the quenching process can realize gas quenching, quenching oil, water nitrate quenching, quenching, etc., can also be vacuum brazing, sintering and surface treatment, etc. Vacuum heat treatment furnace thermal efficiency is high, which can realize the rapid heating and cooling, which can realize no oxidation and decarburization, carburizing, can remove phosphorus crumbs on the surface of the workpiece, and has the effect such as degreasing degassing, so as to achieve the surface brightness purification effect. Generally speaking, the processed workpiece in the heating furnace is slow, and internal temperature difference is small, the thermal stress is small, so little deformation. Product qualified rate is high. Can reduce costs, have degassing effect, so as to improve the mechanical properties of the work and life. Good working environment, safety operation, no pollution and no pollution. Be processed workpiece no hydrogen embrittlement risk, to prevent surface of the titanium and refractory metal shell hydrogen embrittlement, stability and repeatability of vacuum heat treatment process. A series of advantages, the development of vacuum heat treatment equipment and technology is more and more attention and applied more and more widely.
General metal materials in the heating furnace in air, due to the existence of oxygen in the air oxidation, water vapor, carbon dioxide and other gases, these gases and metal oxidation is easy to make the heated surface of the metal oxide film or oxide skin, completely out of the original metallic luster. At the same time, these gases react with the carbon in the metal, make its surface decarburization. If contains carbon monoxide and methane gas in furnace, still can make the metal surface carburization. For the chemical nature very lively Ti, Zr and refractory metal W, Mo, Nb, Ta, etc., in the air heating furnace, in addition to generate oxide, nitride, hydride, to absorb the gas and internal diffusion to metal, metal material performance deteriorated badly. The oxidation and decarbonization, carburization, breathe in, and even produce the ills, such as corrosion in a controlled atmosphere furnace or salt bath furnace heating, sometimes hard to avoid. To solve this problem, often in front of the workpiece heat treatment have machining allowance, after the heat treatment process to remove oxidation and decarburization layer, etc.