Xinxiang New Zuan Diamond Tools Co.,Ltd
Address: 18# Building, Jingu Oriental Plazza,No.1 Jinsui Road, Xinxiang 453000, China
Tel: +8618003823130

Manufacturing Method Of Diamond Saw Blades

  Manufacturing method of Diamond saw Blades

  At present, the main processing methods of diamond are the following four kinds: Thin film coating tool, thick diamond welding tool, diamond sintered tool and single crystal diamond tool.

  1 Thin film coated cutters

  Thin film coated cutters are tools made from diamond films deposited by chemical vapor deposition (CVD) on collective materials with good rigidity and high temperature properties.

  Because the thermal expansion system of $literal ceramics, WC series cemented carbide and the metal W is close to the diamond, Diamond saw Blade the thermal stress produced by the film making is small, so it can be used as the matrix material of the tool body. In the WC series cemented carbide, the existence of the bonding phase co is easy to make the graphite between the diamond film and the substrate to reduce the adhesion strength, before the deposition need to be pretreated to eliminate the impact of co (generally through acid corrosion to the CO).

  Chemical vapor deposition method uses a certain method to activate the gas containing C source, and under the very low gas pressure, Diamond saw Blade the carbon atoms are deposited in a certain area, and the carbon atoms form the diamond phase in the process of condensation and deposition. At present, the CVD method for the deposition of diamond mainly includes: microwave, hot filament, DC arc injection method and so on.

  The advantage of Diamond films is that they can be applied to a variety of complex tools, such as blades with chip, end milling cutter, reamer and bit; can be used to cut many non-metallic materials, cutting force small, small deformation, smooth work, slow wear, workpiece deformation, suitable for the workpiece material good, small tolerance of fine processing. The main disadvantage is that the adhesion between diamond film and Matrix is poor, and diamond thin film tool has no heavy grinding.

  2 Diamond thick Film welding tool

  The fabrication process of diamond thick film welding tool includes: the preparation of large area diamond film, the Shape dimension of diamond film cut into cutting tool, the welding of Diamond thick film and tool base material, Diamond saw Blade the grinding and polishing of diamond thick film tool cutting edge.

  The process of preparing diamond thick films is a direct-current plasma jet CVD method. The diamond is deposited on the WC alloy (surface for mirror processing), and the diamond film will fall off automatically during the cooling process of the substrate. This method has a fast deposition speed (up to 930μm/h), and the lattice bonding is relatively close, but the growth surface is rough. Diamond film hardness, wear-resistant, non-conductive determines its cutting method is laser cutting (cutting can be in the air, oxygen and argon atmosphere in the environment). Laser cutting can not only cut the diamond thick film into the required shape and size, but also cut out the back corner of the tool, with narrow slit, Diamond saw Blade high efficiency and other advantages.

  (1) Welding of Diamond thick film tool

  Diamond with the general metal and its alloy has a high interface energy, resulting in the ordinary diamond can not be infiltrated by the low melting point alloy, weldability is very poor. At present, the weldability of diamond and metal can be improved mainly by adding strong carbide forming elements in Cu-AG alloy solder or by metallization on diamond surface.

  ① Active Brazing method

  Solder is generally used with TI-containing copper silver alloy, without adding flux in inert gas or vacuum welding. The commonly used brazing materials are ag=68 8wt%, cu=26 7wt%, ti=4 5wt%, and the common preparation methods are arc smelting and powder metallurgy. TI as an active element in the welding process with C reflect the formation of TIC, Diamond saw Blade can improve the diamond and solder wettability and bonding strength. Heating temperature is generally 850 ℃, heat preservation for 10 minutes, slow cooling to reduce internal stress.

  ② surface metallization after welding

  The metallization of diamond surface is coated with metal on diamond surface by surface treatment technology, so that its surface has the properties of metal or class metal. Generally in the diamond surface plating ti, ti and C reaction-generated tic, tic and Ag-cu alloy solder has good wettability and bonding strength. At present, the commonly used titanium plating methods are: vacuum physical vapor deposition (PVD, mainly including vacuum evaporation plating, vacuum sputtering plating, vacuum ion plating, etc.), chemical vapor plating and powder covering sintering. The PVD process is low, the temperature of diamond is lower than 500 ℃, Diamond saw Blade the coating and diamond are physical adhesion, no chemical metallurgy. The CVD process ti reacts with the diamond to form a strong metallurgical bond, which has high reaction temperature and damages diamond.

  (2) Sharpening of thick-film diamond tool

  The processing methods of diamond thick film tools are: Mechanical grinding, hot metal disk grinding, ion beam, laser beam and plasma etching.

  3 Diamond Sintered Tool

  The diamond grains with the average granularity of 32~37μm were machined by rolling and grinding failure method, and the diamond grains were directly made by high temperature and high pressure. The grain powder is stacked on the Wc-16wt%co alloy, and then isolated with TA foil, sintered in 5.5GPa, 1500 ℃ under the conditions of 60 minutes, Diamond saw Blade made of diamond sintering body, with this sintering system into the vehicle knife has a high wear resistance.

  4 Single crystal Diamond tool

  The single crystal diamond cutter is usually fixed on the knife head by a single crystal diamond, and the knife head is fixed on the tool lever with a screw or a pressing plate. The methods of fixing diamond on the head of the knife are: mechanical strengthening method (the diamond bottom surface and the pressure surface are polished, fixed on the knife head with pressure plate, powder metallurgy method (the diamond is placed in the alloy powder, by pressure in the vacuum sintering, so that the diamond is fixed on the knife head); bonding and brazing (using inorganic binders or other binders to fix the diamond). Diamond saw Blade Due to the difference of thermal expansion coefficient between diamond and Matrix, the diamond is easy to loosen and fall off.