TB9 titanium alloy wire bar and rolling method thereof

A technology of titanium alloy wire and titanium alloy, applied in metal rolling and other directions, can solve the problems of easy fracture, poor core plasticity, large difference in application performance of TB9 wire and bar, and achieve improved service life, uniform performance, stress Consistent effect

Active Publication Date: 2017-09-08
西部超导材料科技股份有限公司
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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 rolling method of TB9 titanium alloy wire and rod, which solves the problems that the TB9 wire and rod obtained by the existing method have large differences in application performance, poor core plasticity, and are easy to break when used.

Method used

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  • TB9 titanium alloy wire bar and rolling method thereof
  • TB9 titanium alloy wire bar and rolling method thereof
  • TB9 titanium alloy wire bar and rolling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1. Select a TB9 titanium alloy forging billet with a specification of Φ60mm and an uneven transverse structure, place it in a box-type resistance furnace and heat it at 30°C above the phase transition point, and the holding time in the furnace is 90 minutes;

[0037] Step 2, rolling the billet obtained by heating in step 1 on the rolling mill equipment, and rolling to Φ25mm (target specification) in 6 passes, with a deformation of 10% to 15% in each pass, and between rolling passes Stall for 10s.

[0038] Embodiment 1 adopts the Φ 25mm rolling after 6 passes of rolling, and the single-fire deformation amount is 80%. The TB9 titanium alloy wire bar obtained in Embodiment 1 has a fine and uniform structure, see figure 2 a and figure 2 b, The edge grain size of the obtained TB9 titanium alloy rod is 6 grades, the core grain size is 5.5-6 grades, and the grain size difference between the edge and core grain sizes of the structure is 0.5 grades.

Embodiment 2

[0040] Step 1: Select a TB9 titanium alloy forging billet with a specification of Φ55 mm and an uneven transverse structure, place it in a box-type resistance furnace and heat it at 60°C above the phase transition point, and the holding time in the furnace is 70 minutes;

[0041] Step 2, rolling the billet obtained by heating in step 1 on the rolling mill equipment, and rolling to Φ20mm in 6 passes, with a deformation of 10% to 15% in each pass, and stagnation between rolling passes for 8s.

[0042] Embodiment 2 adopts the Φ 20mm rolling after 6 passes of rolling, and the single-fire deformation amount is 85%. The TB9 titanium alloy wire bar obtained in Embodiment 2 has a fine and uniform structure, see image 3 a and image 3 b, The edge grain size of the obtained TB9 titanium alloy rod is 6 grades, the core grain size is 5.5-6 grades, and the grain size difference between the edge and core grain sizes of the structure is 0.5 grades.

Embodiment 3

[0044] Step 1, select a TB9 titanium alloy forging billet with a specification of Φ45mm and uneven transverse structure, place it in a box-type resistance furnace and heat it at 80°C above the phase transition point, and the holding time in the furnace is 60 minutes;

[0045] Step 2, rolling the billet obtained by heating in step 1 on the rolling mill equipment, and rolling to Φ14mm in 10 passes, with a deformation of 10%-15% in each pass, and a stagnation of 6s between rolling passes.

[0046] Embodiment 3 adopts Φ14mm rolling after 10 passes of rolling, and the single-fire deformation amount is 88%. The TB9 titanium alloy wire bar obtained in Embodiment 3 has a fine and uniform structure, see Figure 4 a and Figure 4 b, The obtained TB9 titanium alloy bar has an edge grain size of 8 grades, a core grain size of 8 grades, and a grade difference of 0 grades between the edge and core grain sizes of the structure.

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Abstract

The invention discloses a rolling method of a TB9 titanium alloy wire bar. The rolling method specifically comprises the steps that a TB9 titanium alloy forged blank is heated for 40-150 min above the phase transformation point, and a rolled bar blank is obtained; and then, the rolled bar blank is subjected to rolling of 6-14 passes through a rolling machine, and the wire bar with the target specification is obtained. The invention further discloses the TB9 titanium alloy wire bar prepared through the above method. The structure of the TB9 titanium alloy wire bar is controlled through the heating temperature and the rolling deformation, the TB9 titanium alloy wire bar prepared through the method is fine in structure, the grain size reaches the sixth level or above, and the rate difference of the structure edge part and the core grain size is lower than the first level. The material cross section performance is uniform and consistent after the TB9 wire bar fine and uniform in structure is subjected to heat treatment, the stress state is consistent during application, and the application life of the TB9 titanium alloy wire bar can be effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to a TB9 titanium alloy wire rod, and also relates to a rolling method of the TB9 titanium alloy wire rod. Background technique [0002] TB9 (nominal composition Ti-3Al-8V-6Cr-4Mo-4Zr) titanium alloy is a metastable β-type high-strength titanium alloy, which has excellent comprehensive properties such as high specific strength, corrosion resistance, and high heat treatment performance. It has good cold formability and can be processed into products such as plates, rods and wires. The rivets and springs produced by it are widely used in aerospace and automotive fields. [0003] TB9 titanium alloy wire bar is mainly used for bolts, rivets, springs and other applications. The uniformity of its structure has an important impact on the performance of its parts. In the state of uneven structure, the cross-sectional properties of the material after heat treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/16C21D8/06
CPCB21B1/16C21D8/06
Inventor 郑念庆田成杜小联和永岗侯峰起杨辉董卫选朱燕丽
Owner 西部超导材料科技股份有限公司
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