Method for preparing TC4 titanium alloy wire

Abstract

The invention provides a method for preparing TC4 titanium alloy wire, which comprises the following steps: after annealing, placing an annealed titanium alloy wire blank into a container containing coating agent for heating and stewing, so as to ensure that the titanium alloy wire blank is coated by a protecting film layer; then placing the titanium alloy wire blank onto a linear wire drawing machine for continuous cold drawing. Through the adoption of the process, the linear velocity of the titanium alloy wire blank can be 16 to 40 m/min during cold drawing, so that the production efficiency is greatly improved; the yield is high; both the dimensional precision and surface quality of the titanium alloy wire are effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy wire processing, and in particular relates to a preparation method of TC4 titanium alloy wire. Background technique [0002] The existing processing method of titanium alloy wire usually adopts hot drawing method. When drawing, first coat a layer of graphite milk on the surface of the wire billet and then heat it to one degree for drawing. This method has high production cost and the drawn The dimensional accuracy of the wire is poor, and it is lubricated with graphite emulsion. Not only is the workplace environment harsh, but the surface defects of the drawn wire are not easy to reveal, which affects the quality of the finished wire and brings hidden dangers to the subsequent process; there are also very few cold drawn wires. The patent closest to the present invention is "a production method of titanium alloy wire" (patent number: 201310118902.0), which solves the problem that hot drawing...

AI Technical Summary

Problems solved by technology

[0002] The existing processing method of titanium alloy wire usually adopts hot drawing method. When drawing, first coat a layer of graphite milk on the surface of the wire billet and then heat it to one degree for drawing. This method has high production cost and the drawn The dimensional accuracy of the wire is poor, and it is lubricated with graphite emulsion. Not only is the workplace environment harsh, but the surface defects of the drawn wire are not easy to reveal, which affects the quality of the finished wire and brings hidden dangers to the subsequent process; there are also very few cold drawn wires. The patent closest to the present invention is "a production method of titanium alloy wire" (patent number: 201310118902.0), which solves the problem that hot drawing easily pollutes the working environment on site to a certain extent. The document is recorded as follows: "In the first cold drawing, the wire drawing die is installed in the fourth and fifth mold boxes of the linear wire drawing machine, and the titanium alloy wire billet is drawn out through the fourth and fifth linear wire drawing machine. The fifth wire drawing die is continuously cold-drawn to make titanium alloy wire billet I, then anneal the titanium alloy wire billet I, and then lead the titanium alloy wire billet I out of the second to fifth die boxes of the linear wire drawing machine. The wire drawing die is continuously cold-drawn to make titanium alloy wire billet II, anneal the titanium alloy wire billet II again, lead the titanium alloy wire billet II out again through the second to fifth wire drawing dies in the mold box of the linear wire drawing machine Titanium alloy wire billet III is made by cold drawing, annealed titanium alloy wire billet III, and then the titanium alloy wire billet III is led out through the drawing dies in the first to fifth die boxes of the linear wire drawing machine for continuous cold drawing The titanium alloy wire is finished and wound on the reel. In the above process, calcium-based wire drawing powder or sodium-based wire drawing powder is added to the mold box for each cold drawing. The linear speed of the first cold drawing is 3 meters. / min, the line speed of the second cold drawing is 4m / min, the line speed of the third cold drawing is 5m / min, and the line speed of the fourth cold drawing is 6m / min"

Looking at the above technical solutions, there are the following defects: one is that the line speed is very low during cold drawing, and the highest can reach 6 m / min, which leads to low work efficiency; the other is that the titanium alloy wire blank is only drawn when entering the mold box. Using calcium-based wire-drawing powder or sodium-based wire-drawing powder as a lubricant, the lubrication is not sufficient, the surface quality of the drawn wire is poor and it is easy to break, and the yield is low; the third is that the method recorded in the plan is not feasible in theory, everyone It is known that when cold drawing is performed, when the titanium alloy wire blank passes through a drawing die and enters the following drawing die, the wire diameter of the wire becomes smaller, so the linear speed of the latter drawing die should be controlled faster than that of the previous drawing die. Fast speed can ensure the continuous and smooth drawing of the wire, and the above scheme adopts a linear speed no matter how many wire drawing dies the wire passes through. In this way, when the wire with a smaller diameter passes through the drawing die behind will be broken, so this plan is not feasible; Fourth, when using this plan, it needs to go through multiple passes of cold drawn wire blanks to become finished products, which is inefficient

The above defects have hindered the popularization and application of cold drawn wire, so it is necessary to improve

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