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Preparation method of Gr23 titanium alloy wire for powder preparation

A technology of titanium alloy wire and wire material, which is applied in the field of titanium alloy processing, can solve the problems of residual scale, elongated longitudinal structure, and difficulty in controlling the surface α pollution layer, etc., and achieve the effect of bright surface

Active Publication Date: 2020-09-11
西部超导材料科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of Gr23 titanium alloy wire for powder making, which solves the difficulty of controlling the scale residue of Gr23 titanium alloy wire used to prepare high-purity spherical powder, the surface α pollution layer, and the longitudinal microstructure. elongated question

Method used

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  • Preparation method of Gr23 titanium alloy wire for powder preparation
  • Preparation method of Gr23 titanium alloy wire for powder preparation
  • Preparation method of Gr23 titanium alloy wire for powder preparation

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preparation example Construction

[0036] A preparation method for powder-making Gr23 titanium alloy wire, specifically comprising the following steps:

[0037] Step 1, wire hot drawing:

[0038] The annealed Gr23 titanium alloy wire billet (such as figure 1 Shown); heating with a tubular resistance furnace, the heating temperature is below the phase transition point 90 ℃ ~ 130 ℃, the drawing speed is (4 ~ 16) m / min, the hot drawing pass is 4 ~ 6 passes, each The deformation of each pass is 5.5%-20%, and the cumulative deformation of hot drawing is 39.5%-53%. After hot drawing, the R-state cold-drawn wire billet 1 with an oxidized surface is obtained;

[0039] Step 2, roll die cold drawing, pickling:

[0040] For the cold-drawn wire billet 1 obtained in step 1, two passes of cold drawing are adopted with a double roller die, the deformation of each pass is 6% to 9%, and the cumulative deformation of drawing by the roller die is 12% to 17%. After drawing, the oxide scale on the surface of the wire material h...

Embodiment 1

[0049] Step 1: Use an annealed Φ7.5mm Gr23 titanium alloy round wire blank with uniform horizontal and vertical structures, and heat it with a tubular resistance furnace. The heating temperature is 130°C to 120°C below the phase transition point, and the number of hot drawing passes is 5. Passes, the amount of deformation per pass is 9% to 18%, the hot drawing speed is (4 to 6) m / min, and the hot drawing is to Φ5.15mm.

[0050] In step 2, the silk blank obtained in step 1 is cold-drawn for 2 passes with a duplex roller die, and the deformation of each pass is 8% to 9%, and drawn to Φ4.7mm. Cleaning with acid solution after drawing, pickling and its volume ratio HF:HNO 3 :H 2 O=1:2:7. Obtain silk blanks with no scale and no α-pollution layer pickling surface.

[0051] Step 3: Perform intermediate annealing on the Φ4.7mm pickled surface silk blank obtained in step 2 with a vacuum heat treatment furnace. -2 Pa, the holding time is 60min-90min, and the cold continuous rolling ...

Embodiment 2

[0055] Step 1: Use an annealed Φ3.15mm Gr23 titanium alloy round wire billet with uniform horizontal and vertical structures, and heat it with a tubular resistance furnace at a temperature of 120°C to 110°C below the phase transition point, and the number of hot drawing passes is 4. Passes, the amount of deformation in each pass is 10% to 20%, the hot drawing speed is (6~8) m / min, and the hot drawing is to Φ2.275mm.

[0056] In step 2, the silk blank obtained in step 1 is cold-drawn for 2 passes with a duplex roller die, and the deformation of each pass is 7%-8%, and drawn to Φ2.11mm. Cleaning with acid solution after drawing, pickling and its volume ratio HF:HNO 3 :H 2 O=1.2:3:10. Obtain silk blanks with no scale and no α-pollution layer pickling surface.

[0057] Step 3: The Φ2.11mm pickling surface silk billet obtained in step 2 is subjected to intermediate annealing in a vacuum heat treatment furnace, the holding temperature is 715°C-730°C, and the vacuum degree in the ...

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Abstract

The invention discloses a preparation method of a Gr23 titanium alloy wire for powder preparation. The preparation method comprises the steps of heating a Gr23 titanium alloy wire blank with uniform transverse and longitudinal structures through a tube heating furnace below the phase transformation point, and conducting multi-pass drawing to obtain a wire blank with the oxidized surface; conducting multi-pass cold drawing on the wire blank through a roller die, and conducting acid pickling through an acid solution to obtain the wire blank without oxide skin, a surface pollution layer and an acid pickling surface; conducting intermediate vacuum annealing on the wire blank to obtain a cold continuous rolled wire blank with the good cold workability; conducting cold continuous rolling on thecold continuous rolled wire blank through twelve square-pore rollers to obtain a special-shaped wire, and conducting cold drawing on the special-shaped wire through a duplex roller die to form a roundwire; and conducting vacuum heat treatment on the wire to obtain the Gr23 titanium alloy wire with the bright surface. The Gr23 titanium alloy wire prepared through the method has no surface oxide skin and surface pollution layer residues, is uniform and fine in transverse and longitudinal structure, is of an equiaxial structure, has the low H content and meets the requirement for raw materials for preparing high-quality spherical powder through a plasma atomization method.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to a preparation method of Gr23 titanium alloy wire for powder making. Background technique [0002] Additive manufacturing refers to an advanced manufacturing technology that produces three-dimensional solids by adding materials layer by layer through continuous physical layer superposition. At present, the main preparation methods of titanium and titanium alloy spherical powder for additive manufacturing are inert gas atomization method, plasma atomization method, electrode induction melting gas atomization method, plasma rotating electrode method, etc. [0003] Titanium alloy wire is used in the preparation of titanium alloy spherical powder by plasma atomization method. The main reason why the preparation of high-purity titanium alloy spherical powder is difficult is that the preparation of high-quality titanium alloy wire is difficult, and impurit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/18B21C1/04B21C9/00B22F9/14B02C19/00C22F1/02C22F1/18C23G3/02
CPCB21C1/04B21B1/18B21C9/00B02C19/00C22F1/183C22F1/02B22F9/14C23G3/028
Inventor 杨辉白洁付航涛侯峰起和永岗张小航楼美琪王凯旋杜予晅刘向宏
Owner 西部超导材料科技股份有限公司
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