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Method of improving yield of titanium alloy wire rods

A technology of titanium alloy and yield rate, which is applied in the field of titanium alloy wire preparation, can solve the problems of severe surface oxidation, rough surface, and low yield rate, and achieve the effects of reducing annealing passes, eliminating scratches, and reducing pickling processes

Active Publication Date: 2020-09-22
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for improving the yield of titanium alloy wires in order to overcome the problems of scratches, rough surfaces, severe surface oxidation and low yield of titanium alloy wires produced in the prior art. When preparing titanium alloy wire rods, wire drawing powder is not used as a lubricant, which reduces the pickling process. At the same time, roller dies are used for diameter reduction instead of fixed dies, which effectively eliminates scratches on the wire rod surface and ensures the smoothness of the surface.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This example is used to illustrate the preparation method of the finished Φ2mm TA1 wire.

[0043] A. Use the straightening device equipped at the entrance of the swaging machine to adjust the Φ8mm wire rod after hot rolling until the straightness is less than 10mm / m, and then get stuck at the entrance of the swaging machine;

[0044] B. Use a rotary forging machine to reduce the diameter of the Φ8mm wire to Φ6mm, Φ4.5mm, Φ3.4mm, Φ2.6mm and Φ2mm in turn;

[0045] C. In the diameter reduction process described in step B, when the diameters of the wire rods are Φ6mm, Φ4.5mm, Φ3.4mm and Φ2.6mm, the vacuum annealing furnace is used for annealing at 600°C, and the furnace is cooled after holding for 1 hour , where the ultimate vacuum degree of the vacuum annealing furnace is 3x10 -2 Pa, the boost rate is less than 5Pa / h;

[0046] D. During the reducing process described in step B, use DTE46 anti-wear hydraulic oil to lubricate and cool the wire rod.

[0047] The obtained f...

Embodiment 2

[0049] This example is used to illustrate the preparation method of the finished Φ2mm TB14 wire.

[0050] A. Use the straightening device equipped at the entrance of the swaging machine to adjust the Φ8mm wire rod after hot rolling until the straightness is less than 9mm / m, and then get stuck at the entrance of the swaging machine;

[0051] B. Use a rotary forging machine to reduce the diameter of the Φ8mm wire to Φ6mm, Φ4.5mm, Φ3.4mm, Φ2.6mm and Φ2mm in turn;

[0052] C. In the diameter reduction process described in step B, when the diameters of the wire rods are Φ6mm, Φ4.5mm, Φ3.4mm and Φ2.6mm, the vacuum annealing furnace is used for annealing at 830°C, and the furnace is cooled after holding for 1 hour , where the ultimate vacuum of the vacuum annealing furnace is 3.2x10 -2 Pa, the boost rate is less than 4Pa / h;

[0053] D. During the reducing process described in step B, use DTE46 anti-wear hydraulic oil to lubricate and cool the wire rod.

[0054] The obtained finish...

Embodiment 3

[0056] The finished product Φ2mm TA1 wire was prepared according to the method of Example 1. The difference was that in step C, annealing treatment was performed in a vacuum annealing furnace at 550° C., and the temperature was kept for 1.5 hours and then cooled with the furnace. The obtained finished TA1 wire with a diameter of 2 mm has a smooth surface without defects such as scratches and pits.

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PUM

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Abstract

The invention relates to the technical field of titanium alloy wire rod preparation and discloses a method of improving yield of titanium alloy wire rods. The method comprises the following steps of A, aligning the wire rods with diameters phi of 7.8-8.2 mm and clamping the wire rods at an inlet of a rotary swaging machine; B, reducing the wire rods with diameters phi of 7.8-8.2 mm to phi of 1.8-2.2 mm by using the rotary swaging machine; C, in the reducing process, when the diameters phi of the wire rods are 5.8-6.2 mm, 4.3-4.7 mm,3.2-3.6 mm and 2.4-2.8 mm separately, annealing the wire rodsby using a vacuum annealing furnace; and D, in the reducing process, lubricating and cooling the wire rods by using anti-wear hydraulic oil. The method which does not use wire drawing powder as a lubricant cancels a pickling step and reduces the diameters by using a roller die, so that scratches of the surfaces of the wire rods are eliminated and the surface smoothness is guaranteed. Meanwhile, inthe reducing process, problems of severe oxidization of the surface of a material and the like are avoided through cold working, so that the yield of the material is improved greatly.

Description

technical field [0001] The invention relates to the technical field of titanium alloy wire preparation, in particular to a method for improving the yield of titanium alloy wire. Background technique [0002] Titanium alloy has been widely used in aerospace and energy fields because of its high specific strength, good oxidation resistance and thermal corrosion resistance. Since titanium alloys are more expensive than aluminum alloys, the processing costs of titanium alloy products and the yield of finished products have a direct impact on prices during the mass promotion of titanium alloys. [0003] At present, titanium alloy wire rods are manufactured through vacuum consumable furnaces for multiple times of smelting, billeting, hot rolling, and peeling to about Φ8.0mm~Φ12.0mm wire rods. Its follow-up processing generally adopts fixed die hot drawing for diameter reduction drawing, or directly passes through fixed die under the action of dry powder lubrication for cold drawi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04C21D1/26
CPCB21C37/047C21D1/26
Inventor 申学良唐新新冯兆龙王泽龙
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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