(1) Due to the small elastic modulus of titanium alloy, the clamping deformation and stress deformation of the workpiece during processing are large, which will reduce the machining accuracy of the workpiece; When installing the workpiece, the clamping force should not be too large, and auxiliary support can be added if necessary.
(2) If a cutting fluid containing hydrogen is used, it will decompose and release hydrogen gas at high temperatures during the cutting process, which is absorbed by titanium and causes hydrogen embrittlement; It may also cause stress corrosion cracking of titanium alloy at high temperature.
(3) Chlorides in cutting fluid may also decompose or volatilize toxic gases during use. Safety precautions should be taken during use, otherwise they should not be used; After cutting, the parts should be thoroughly cleaned with a chlorine free cleaning agent in a timely manner to remove chlorine residues.
(4) It is prohibited to use tools and fixtures made of lead or zinc based alloys to come into contact with titanium alloys, and the use of copper, tin, cadmium, and their alloys is also prohibited.
(5) All tools, fixtures, or other devices in contact with titanium alloys must be clean; After cleaning titanium alloy parts, it is necessary to prevent grease or fingerprint contamination, otherwise it may cause stress corrosion of salt (sodium chloride) in the future.
(6) In general, when cutting titanium alloys, there is no risk of ignition. Only in micro cutting, the small chips cut can ignite and burn. In order to avoid fire, in addition to pouring a large amount of cutting fluid, it is also necessary to prevent chips from accumulating on the machine tool. After the tool is blunt, it should be replaced immediately, or the cutting speed should be reduced, and the feed rate should be increased to increase the chip thickness. If there is a fire, fire extinguishing equipment such as talc powder, limestone powder, and dry sand should be used to extinguish it. Carbon tetrachloride and carbon dioxide fire extinguishers are strictly prohibited, and water should not be used because water can accelerate combustion and even cause hydrogen explosions.