Since the titanium alloy material tends to fill the grinding wheel, it brings difficulties to the grinding of titanium alloy rods and Titanium Hot Rolled Sheet. During grinding, the high-temperature rise at the interface between the metal and the grinding wheel causes the grinding surface to have High residual stress, meanwhile, the surface finish is not ideal.
The following methods can be used to basically solve these difficulties:
(1) Choose a suitable grinding wheel, such as a silicon carbide grinding wheel, with medium grain size (60~80), medium hardness (J~M), a surface speed of 700~1200m/min, aluminum oxide (aluminum oxide powder or corundum) The grinding wheel should be used at a lower speed, such as 550~600min. Medium grain size is also required.
(2) Use a lower grinding wheel speed and feed rate; due to the low speed of the grinding wheel, fewer sparks are generated.
(3) Cooling with buffer or cutting fluid coolant, using ceramic bond and chlorinated or vulcanized cutting oil, can get good results. Whatever type of coolant is used, it needs to be well-filtered to eliminate "fishtail" stains due to the recirculation of titanium particles.
(4) Titanium sparks may catch fire when encountering oil mist, but immersing the workpiece in oil can reduce this danger. The anti-rust ammonium nitrite aqueous solution completely eliminates the risk of fire.
But even the best grinding conditions will reduce the fatigue performance of the workpiece
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