In the field of metal material processing, in particular, it relates to a drawing lubrication method of titanium niobium wire. The technical problem to be solved in the invention is to provide a drawing lubrication method for titanium and niobium wire material, which includes the following steps: a. Put the titanium and niobium wire material into the mixed molten salt of sodium chloride and barium carbonate for heat preservation, and then wash it with water and pull it out; B. Repeat step A to pull the titanium and niobium wire to the required size. The titanium niobium wire produced by the method has the advantages of high dimensional accuracy and high yield.
Titanium-niobium alloy wire is generally used to make aircraft rivets. With the rapid expansion of aviation industry, the demand for titanium-niobium alloy wire is increasing in recent years. Titanium alloy wire is generally made of poly crystal drawing die or high crystal drawing die after multiple cold drawing and vacuum annealing. Because of the material properties of titanium niobium alloy, the wire is easy to stick to the mold during drawing deformation.
A titanium alloy wire material production method ", using calcium base wire drawing powder or sodium base wire drawing powder as lubricant, using poly crystal wire drawing die or high crystal wire drawing die to make titanium alloy wire blank through multi-mode continuous cold drawing and vacuum annealing. But titanium niobium alloy can not be produced because of the serious adhesion. Nowadays, the preparation and processing of titanium-niobium alloy wire with good surface quality, less process, high yield and low cost has become a bottleneck, which needs to be solved urgently. Therefore, it is necessary to develop a new lubrication method for TiNb alloy wire.
Titanium niobium wire reacts with salt bath furnace solution at high temperature to get titanium carbide film on the surface of wire, which plays a role of lubrication and anti-stick mould in the process of drawing the fixed mould. At the same time, titanium and niobium wire was annealed without oxidation at high temperature in salt bath furnace, which eliminated the work hardening caused by the previous drawing and prepared for the next drawing. The method has the advantages of high surface quality, high yield, less working procedure and low cost, etc. Therefore, the invention provides a new choice for the drawing production of titanium niobium wire and has broad application prospect.
A layer of dense compound is formed on the surface of titanium niobium wire by the reaction of active salt ingredients with titanium niobium in salt bath furnace at high temperature, which can lubricate and prevent sticking mold in subsequent drawing process. At the same time, the intermediate annealing of titanium and niobium wire is realized by heating without oxidation and decarburization in salt bath furnace.
