Pasty brazing filler metal for brazing diamond in air as well as preparation method and application of pasty brazing filler metal

Abstract

The invention discloses a pasty brazing filler metal for brazing a diamond in air as well as a preparation method and application of the pasty brazing filler metal. The pasty brazing filler metal for brazing the diamond in the air is prepared from 88wt% to 92wt% of brazing filler metal, 1wt% to 2wt% of soldering flux and a rest part, wherein the rest part is prepared from a binder and water; the brazing filler metal is prepared from BNi-2 and titanium powder in a mass ratio of (1 : 0.05) to (1 : 0.1); the soldering flux is prepared from aluminum fluoride and potassium fluoride in a mass ratio of (1 : 0.1) to (1 : 1.8). According to the pasty brazing filler metal for brazing the diamond in the air, which is provided by the invention, a vacuum or protective atmosphere is not needed in a brazing process; the brazing can be completed in the air; therefore, the machining flexibility is greatly improved; the production cost is decreased; the production efficiency is improved; meanwhile, the use level of the brazing filler metal is also more easily controlled; the service life of a tool can be drastically prolonged; the preparation method of the pasty brazing filler metal for brazing the diamond in the air is simple, is easy in condition control, and is suitable for large-scale production.

Description

technical field [0001] In particular, the invention relates to a paste solder for brazing diamond in air, its preparation method and application. Background technique [0002] Diamond tools are especially suitable for processing hard and brittle materials, especially non-metallic materials, such as stone, wall and floor tiles, glass, ceramics, etc.; they can also be used for processing non-ferrous metals, alloys, wood, such as copper, aluminum, hard alloys, hardened steel, cast iron Wait. At present, diamond tools have been widely used in construction, building materials, geology, metallurgy, machinery, electronics, ceramics, wood, automobiles and other industries. [0003] In practical application, the solder for brazing diamond needs to have the following characteristics: 1. The solder has good wettability and bonding strength to the diamond and the substrate; 2. The solder is preferably not corrosive or slightly erosive to the diamond; 3. 1. The softening point of the s...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the solders used by most manufacturers contain about 10℅ of chromium or titanium. However, when elements such as Ti and Cr are heated in air, they are easily oxidized and lose their activity.

The solution in the prior art is usually under vacuum or inert gas protection conditions when brazing diamonds. Compared with brazing in air, this greatly increases processing costs and reduces production efficiency