Advantage of vacuum brazing of cutter bits for asphalt milling machine
Vacuum brazing can use a special vacuum brazing furnace or a vacuum quenching furnace. Cutter
Vacuum brazing is performed in a vacuum furnace, so the method is brazing in the furnace. Vacuum brazing tool
The welding process is as follows: cleaning the pre-welded part of the steel body, the brazing material and the carbide tip → filling the brazing material, carbide cutter tip → put the cutter bits into the fixture → start heating furnace → cool.
The characteristics of using a vacuum furnace brazing tool:
First, because brazing is performed in a vacuum state, it does not need to use brazing flux, so its brazing quality is stable, the weld is dense without air hole; or slag, and the weld flat and smooth, high quality;
Second, due to the brazing under vacuum, There will not happen the Oxidation or decarburization in the steel body and carbide tip.
it can significantly improve the durability of the tool;
Third, under vacuum, brazing, The quenching is completed in one heating, which can reduce the damage caused by repeated heating to the cemented carbide and the steel body. It can greatly simplify the process and improve productivity;
Fourth, special tooling can be used during quenching, which can meet the requirement The hardness of the carbide tip with high wear resistance requirements is greater than or equal to HRC45. and the steel body with good toughness, The hardness of the shank part is reduced to HRC38 ～ HRC43, which can significantly improve the durability of the cutter bits
