Because the diamond blade has the very high chemical stability, it is difficult to complete welding with chemical reaction and other metal attack, therefore, how to firmly complete the strong cohesion of diamond blade and metal, become the technical difficulties in manufacturing diamond tools and discussion topics urgently processing. With brazing method directly welded diamond blade has a lot of difficulties, is also a concern by the public.
To complete the brazing demand of diamond blades:
(1) the wettability: when soldering, solder wetting required by welding information talent guarantee welding parts of blades without defects. Due to the appearance of diamond is very high, poor wettability, and find out about the diamond appearance all have good wettability of filler metals and metal matrix is the key to the brazing of victory.
(2) bond performance: the solder should not only have good wettability, but also can produce chemical reaction with the welding material, which can form chemical bond to join, and finish the welding with sufficient adhesion.
(3) the residual stress, the coefficient of thermal contraction of diamond and metal are nearly ten times, in the cooling process after welding will constitute a large residual stress, which affects the welding strength and damage to diamond.
(4) the corrosion of the diamond, diamond at high temperature oxidation or round blade graphitization, the effect of corrosion on the diamond also has some metal, and therefore essential to choose the suitable working environment and solder, reduced to corrosion phenomenon of diamond to the lowest level.
