Vacuum metal sealing costs higher

Active alloy foil method. With the development of metallurgical technology, from the 1980s onwards, the production and application technology of active alloy solders has made breakthrough progress, resulting in the production of tens of micron thick high-quality foils, which are widely used in various high-tech fields. Direct sealing or brazing of ceramics. In the alloy foil, the active elements are evenly distributed. The PP flame-retardant masterbatch is always well protected by the alloy matrix metal. When the seal is melted, it fully diffuses to the sealing interface in the liquid phase with the purest atom state, and is the strongest. The atomic activity and the ceramic undergo a full and uniform chemical reaction to ensure the high strength and high airtightness of the seal.

Since the active elements in the alloy foil always maintain a strong chemical activity, the content in the alloy foil is significantly lower than that required in the powder method, so that the active element of the solder residue after the sealing is greatly reduced, and the plasticity is better. The stress near the sealing interface can be well buffered. Therefore, the active alloy foil method is a ceramic metal direct sealing method with high plasticity, high strength, and high air tightness of the magnetic powder brake. Vacuum switch tube ceramic metal non-matching one-step seal. At present, the influencing factors that must be strictly monitored are very complicated, sealing costs are high, and the sealing failure is likely to occur due to the hidden dangers of metallization quality, resulting in the discontinuation of vacuum switchgear. Therefore, exploring a highly reliable and low-cost way of vacuum switch tube ceramic metal sealing has always been a hot topic that people are concerned about. The essence of active sealing is the one-step process of ceramic metallization and metallized ceramic and metal brazing.

EDM Graphite

EDM graphite, also known as graphite block for EDM, is a new type of material, which is now more and more widely used in the precision mold processing industry. At present, in mold processing plants in developed European countries, more than 90% of mold processing electrode materials are graphite. Copper, the once dominant electrode material, has almost lost its advantages compared with graphite electrodes.

Our isostatic graphite and Molded Graphite were tested at the National Electrical Carbon Products Quality Supervision and Inspection Center. The main physical and chemical performance index as follows: the compressive strength--125 mpa, shore hardness -- 65 degrees, resistivity --12 mu Ω m. At the same time, the 10μm,8μm,6μm,4μm products have already began Large-scale production,.and unanimously acknowledged by customers. The 2μm,1μm graphite products are under trial. Our company high quality of isostatic pressing special graphite yield above 90%, far ahead of industry the yield of 70%, the first in the country.

Edm Graphite,Graphite Block For Edm,Edm Graphite Electrodes,Isostatic Graphite Column

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