Low-cost efficient preparation method for two-phase titanium alloy round rod

A titanium alloy, low-cost technology, applied in the field of low-cost and high-efficiency preparation of two-phase titanium alloy round rods, can solve the problems of long forging processing routes, large material losses, and high costs of standard round rods, and improve processing technology and yield , reduce the invisible loss of materials, and compress the production cycle

Pending Publication Date: 2020-05-12
西安圣泰金属材料有限公司
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of long forging processing route, high material loss, high cost and low efficiency of medium-sized two-phase titanium alloy rod forging and processing that require high performance, the present invention provides a low-cost and high-efficiency preparation method for two-phase titanium alloy round rod, The technical problem to be solved in the present invention is realized through the following technical solutions:

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  • Low-cost efficient preparation method for two-phase titanium alloy round rod
  • Low-cost efficient preparation method for two-phase titanium alloy round rod
  • Low-cost efficient preparation method for two-phase titanium alloy round rod

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Embodiment 1

[0038] See Figure 1-Figure 7 . The embodiment of the present invention provides a low-cost and high-efficiency preparation method for a two-phase titanium alloy round rod, which includes the following steps:

[0039] Step 1, one fire forging:

[0040]Take the columnar ingot and place it in a box-type resistance furnace, heat it, and carry out upsetting and drawing forging for three times. After the last upsetting and drawing, forge and press the four edges in the long direction, and then take it out and air-cool it to obtain a rectangular parallelepiped with a regular octagonal cross section. forged billet.

[0041] Among them, the ingot is a two-phase titanium alloy ingot that has undergone vacuum self-consumption melting for three times. The weight of the ingot is 2800kg-3200kg, the cross-sectional diameter of the ingot is 590mm-610mm, and the ingot is cut into several equal parts. 510mm, the weight of a single ingot is about 650kg.

[0042] The ingot heating temperatur...

Embodiment 2

[0061] Take a Ф590×505 ingot, and measure the phase transition point T of the ingot β =995°C, put it in a box-type resistance furnace, and perform the first fire forging process: first forge a billet of (420×420×780)mm, and then pass through (420×420×780)mm→(560×560× 438)mm three-upsetting and three-drawing forging, the heating temperature of the ingot is 1150°C, and the holding time is 340min. After the last upsetting and drawing forging is completed, the drawing and drawing are directly carried out, and the four edges in the long direction are forged. The size of the cuboid is: the cross section is square The side length of the polygon is 152mm, the length of the cuboid is 1240mm, the final forging temperature is 885°C, air-cooled after forging, the length direction is divided into 620mm, and the first forging blank of (octagonal shape 152×620)mm is obtained.

[0062] Polish the oxide skin on the surface of the first forging billet, place it in a box-type resistance furnace,...

Embodiment 3

[0068] Take a Ф595×510 ingot, and measure the phase transition point T of the ingot β =988°C, placed in a box-type resistance furnace, for the first fire forging process: first forge a billet of (430×430×767) mm, and then pass through (430×430×767) mm→(565×565× 444)mm three-upsetting and three-drawing forging, the heating temperature of the ingot is 1130°C, and the holding time is 340min. After the last upsetting and drawing forging is completed, the drawing-length forging is directly carried out, and the four edges in the long direction are forged. The size of the cuboid is: the cross-section is square The side length of the polygon is 156mm, the length of the cuboid is 1210mm, the final forging temperature is 870°C, air-cooled after forging, the length direction is divided into 605mm, and the first forging blank of (octagonal shape 156×605)mm is obtained.

[0069] Polish the oxide skin on the surface of the first forging billet, place it in a box-type resistance furnace, and...

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Abstract

The invention provides a preparation method for a two-phase titanium alloy round rod, wherein three times of forging is realized according to a measured phase transformation point T[beta] of an ingotblank, and multi-directional thermo-plasticity forging deformation is realized according to heating temperature of three heating numbers in a high-to-low sequence; and forging with right-octagonal cross sections is used for two heating numbers under the phase transformation point. The forging mode avoids defects such as serious cracking caused by rapid cooling of corner angles of a forging blank with a right-square cross section as well as organizational unevenness caused by generation of deformation dead zones during forging with a right-square cross section can be avoided. Uniform and equal-axial alpha + beta two-phase processing organizations are obtained through polygonal multi-directional upsetting-stretching forging and large-deformation rolling under the phase transformation point Tbeta, so organizational evenness of the cross section of the round rod is improved; heating numbers of forging can be effectively reduced; surface cracking defects of forging can be reduced; intangible losses of materials are reduced; processing manufacturability and a yield are increased; production cost is reduced; production duration is reduced; production efficiency and a production capacity are increased; and requirements for industrial batched production can be better satisfied.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of titanium alloy materials, and in particular relates to a low-cost and high-efficiency preparation method of two-phase titanium alloy round rods. Background technique [0002] Titanium alloy has low density, low modulus, biocompatibility, excellent corrosion resistance, high specific strength, especially two-phase titanium alloy, which has the characteristics of high strength and high plasticity, and is widely used in the field of biomedicine Surgical implants, and raw materials for engine components in aerospace. These two fields have very high technical requirements for titanium alloy raw materials. Due to the long-term service under complex working conditions, two-phase titanium alloys are required to have uniform and fine equiaxed grains. Generally, they are required to reach the A1-A5 level specified in ISO20160. Obtain performance indicators of high strength, high toughness, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/06B21J1/00B21J1/06B21J5/00B21J5/08B21J5/06B21D3/00
CPCB23P23/06B21J1/003B21J1/06B21J5/002B21J5/08B21J5/06B21D3/00
Inventor 樊亚军曹继敏罗乾伟王戈雷雨李进辉
Owner 西安圣泰金属材料有限公司
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