If the cutting fluid containing hydrogen is used, hydrogen will be decomposed and released at high temperature during the cutting process, which will be absorbed by titanium and cause hydrogen embrittlement. It may also cause high temperature stress corrosion cracking of titanium alloys.
The chloride in the cutting fluid may also decompose or volatilize toxic gases when used, and take safety protective measures when used, otherwise it should not be used; After cutting, the parts should be thoroughly cleaned with a chlorine-free cleaning agent in time to remove chlorine-containing residues.
It is prohibited to use lead or zinc-based alloys made of work, fixtures and titanium alloy contact, copper, tin, cadmium and their alloys are also prohibited.
All works, fixtures or other devices in contact with titanium alloys must be clean; After cleaning titanium alloy parts, to prevent grease or fingerprint pollution, otherwise it may cause salt (sodium chloride) stress corrosion later.
Under normal circumstances, when cutting titanium alloy, there is no danger of ignition, only in the micro cutting, the fine chips cut off have ignition combustion phenomenon. In order to avoid fire, in addition to a large amount of pouring cutting fluid, it should also prevent the accumulation of chips on the machine tool, replace the tool immediately after blunt, or reduce the cutting speed, increase the feed to increase the chip thickness. In case of fire, talc powder, limestone powder, dry sand and other fire extinguishing equipment should be used to extinguish the fire, it is strictly prohibited to use carbon tetrachloride, carbon dioxide fire extinguishers, and can not be watering, because water can accelerate combustion, and even lead to hydrogen explosion.
