Welding tooth common sense
The alloy is sintered by ultrafine powder under high pressure at a temperature of 1200 °C, and the alloy welding is biased towards low temperature welding. The purpose is to protect its metallographic structure from being damaged during welding, the welding temperature should not be higher than 750 °C, and the temperature is uniform, and it is best to weld with teeth. When welding teeth, pay attention to whether there is carbide in the alloy, keep the alloy clean and do not have dust or constant temperature in the workshop, the tooth holder is not allowed to have rust spots or oxides, the flux should not be too thick or too thin, and it should be adjusted into a paste, and the granular flux cannot be used. Pay attention to precipitation, mix the flux when reusing, it is best to drop on the alloy, not paste outside the root of the substrate teeth. The use of silver wire can not pursue the silver content is too high, generally at 45% can be. The main metal elements of silver welding wire are silver, copper, nickel, silver low temperature, nickel and zinc enhance fluidity, copper increases strength, as long as the appropriate amount of manganese, indium and selenium is added, the adhesion is stronger. Manganese has pores, indium and selenium elements are too expensive, the general welding strength of the welding wire is 5-16KG per square centimeter, and the strength of each tooth depends on the size of the alloy welding area, and the strength of each tooth cannot be less than 50KG, and the industrial type is more than 100KG. After welding, the saw blade is immediately placed in a 100°C oven for tempering, which reduces the stress caused by the welding teeth and refines the internal structure of the alloy, and improves the durability and wear resistance.