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A kind of preparation method of gr23 titanium alloy wire material for milling

A titanium alloy wire and wire material technology, which is applied in the field of titanium alloy processing, can solve the problems of longitudinal structure elongation, oxide scale residue, and difficulty in controlling the α pollution layer on the surface, so as to achieve the effect of ensuring dimensional accuracy and bright surface

Active Publication Date: 2022-03-04
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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  • A kind of preparation method of gr23 titanium alloy wire material for milling
  • A kind of preparation method of gr23 titanium alloy wire material for milling
  • A kind of preparation method of gr23 titanium alloy wire material for milling

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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 Gr23 titanium alloy wire material for powder making. The Gr23 alloy wire billet with uniform horizontal and vertical structures is heated below the phase transition point in a tubular heating furnace, and the oxidized surface is obtained by multi-pass drawing. The silk blank; the silk blank is cold-drawn with a roller die for multiple passes, and pickled with an acid solution to obtain a silk blank without scale and surface contamination layer, and the pickling surface; the silk blank is annealed in an intermediate vacuum , to obtain cold continuous rolling billets with good cold processing performance; cold continuous rolling of cold continuous rolling billets with twelve square-hole rollers to obtain special-shaped wires, and draw the special-shaped wires into round wires through double-roller die cold drawing ; Carry out vacuum heat treatment on the wire to obtain Gr23 alloy wire with bright surface. The Gr23 alloy wire prepared by the method of the present invention has no surface oxide skin and residual surface contamination layer, uniform and fine horizontal and vertical structures, both are equiaxed structures, and the H content is low, which meets the requirements of the plasma atomization method to prepare high-quality spherical powder for raw materials. requirements.

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 Patents(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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