Monolayer brazing diamond wheel introduction of some of the major

Using scanning electron microscopy showed white gold diamond silver wrapping around , X-ray diffraction analysis confirmed Cr3C2 generation, this carbide layer is achieved Diamond
Stone and steel substrate bonding strength between higher . Diamond grinding experiments also confirmed that tile saw blade  there will grip strength, high temperature brazing monolayer diamond grinding wheel life and grinding efficiency than electroplated sand
Wheel has been significantly improved . Monolayer coating high temperature brazing diamond diamond wheel as poor thermal stability , 800 ℃ when the transition occurs graphite , so the higher soldering temperatures will inevitably lead to
Leaving diamond diamond intensity decreased thermal damage ; while binders harmful elements make diamond graphitization corrosion , it can be coated with a layer of diamond surface active metal
And then brazing alloys . Abrasive plating techniques include chemical vapor deposition, ion plating, thermal evaporation , vacuum evaporation plating such as micro- chemical vapor deposition Cr, Ti, vacuum micro evaporation plating can improve the surface properties of diamond . Brazing process , mediated by virtue of the role of the coating , in addition to diamond and easier to achieve strong metallurgical bond between the chemical bonding , the hot air as an oxygen barrier coating on leaving the role of carbon atoms in the diamond surface reacts with oxygen speed is greatly reduced, while strong carbide forming coating elements and diamond surface carbon atoms react carbide , closed diamond surface dangling bonds , increasing the oxidation resistance , thus inhibiting binding agent Fe, Co, Ni and other elements of the diamond itself, graphitization of diamond etching process, so that after brazing still maintain the original strength of the abrasive grain type . Brazing steel substrate when the first plating layer is pre- Ni-P alloy ( melting point 880 ℃), and the arrangement of the diamond film on the alloy layer , 1050 ℃ argon brazing 5min, then cooled to room temperature. Grinding tests dry core drill bits showed that the diamond coating and binding agent as a good wettability , and effectively avoid the grit off, greatly improves the performance of the grinding wheel , to achieve a substantial increase in processing efficiency wheel life .
It should be pointed out that as the diamond coating and binding agent between the deposit with adaptability , so only suitable binder coating process to make optimum physical and mechanical properties of diamond . Single high temperature brazing problems and countermeasures wheel kept at home and abroad wheel of high temperature brazing monolayer Although achieved good results , but its manufacturing process needs to be further improved. Currently retained, mainly as follows: one in what brazing process to produce the diamond bonding interface bonding strength with high chemical diamond polishing pads  metallurgical bonding ; two suitable binding agent layer thickness and uniformity control ; three abrasive reasonable and orderly arrangement . For improving the bonding strength of the diamond and the brazing material , its key diamond brazing , brazing material between the metal substrate to produce three chemical metallurgical bonding , the solder alloy should contain a strong carbide forming elements ( such as Ti, Cr, V, etc. ) , and to seek lower temperature brazing of diamond to minimize the damage. Before brazing filler metal abrasive orderly arrangement to improve the consistency of thick cloth after brazing binder layer thickness uniformity is also very important. Work surface with abrasive wheel arrangement reasonably abrasive industry has been committed to the pursuit target , and is expected to achieve single grinding wheel .