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Preparation method of beta titanium alloy tube

A beta titanium alloy and pipe technology is applied in the field of preparation of beta titanium alloy pipes, which can solve the problems of low pressure resistance value, poor use safety and low material utilization rate of pipes, and achieve low production cost, high utilization rate and surface quality. Good results

Active Publication Date: 2013-12-11
西安秦钛智造科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only the material utilization rate is low, the processing cycle is long, and the processing cost is high, but also the prepared pipe is in a hot-processed state, without processing flow lines, the pipe has a low pressure resistance value, and the use safety is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of Ф49mm×2mmβ titanium alloy pipe:

[0025] Step 1. The specification is Ф65mm×5mm by conventional skew rolling and piercing process, and the nominal composition is Ti-4Al-4Mo-4V-3Cr-1Fe-2Sn (that is, the chemical composition is calculated by weight percentage: Al4%, Mo4%, V4% , Cr3%, Fe1%, Sn2%, the balance is Ti and unavoidable impurities) β-titanium alloy tube blank, and then evenly apply lubricant (chlorinated paraffin lubricant) on the inner and outer surfaces of the β-titanium alloy tube blank, and then A cold-rolled pipe mill (LG60 two-roller cold-rolled pipe mill) is used to carry out billet rolling one by one. The deformation of billet rolling is controlled to be 48%, and the rolling rate is 20 times / min. The obtained specification is Ф55mm×3mm rough rolled tube billets;

[0026] Step 2. Carrying out the first solution treatment of the rough-rolled tube billet described in step 1, the specific process is: placing the rough-rolled tube billet in an ...

Embodiment 2

[0031]Preparation of Ф53mm×1.5mmβ titanium alloy pipes:

[0032] Step 1. The specification is Ф89mm×8mm by conventional drilling and extrusion process, and the nominal composition is Ti-3Al-6Mo-3V-1Cr-1.5Fe-3Sn (that is, the chemical composition is calculated by weight percentage: Al3%, Mo6%, V3%, Cr1%, Fe1.5%, Sn3%, the balance is Ti and unavoidable impurities) β-titanium alloy tube blank, and then evenly apply lubricant (chlorinated paraffin wax lubrication) on the inner and outer surfaces of the β-titanium alloy tube blank agent), and then use a cold-rolled pipe mill (LG60 two-roll cold-rolled pipe mill) to carry out one billet rolling, control the deformation of the billet rolling to 51%, and the rolling rate to be 20 times / min to obtain the specification It is a rough rolled tube billet of Ф68mm×5mm;

[0033] Step 2. Carrying out the first solution treatment of the rough-rolled tube billet described in step 1, the specific process is: placing the rough-rolled tube billet...

Embodiment 3

[0038] Preparation of Ф89mm×2.5mmβ titanium alloy pipes:

[0039] Step 1. The specification is Ф116mm×10mm by conventional drilling and extrusion process, and the nominal composition is Ti-5Al-3Mo-6V-4Cr-0.5Fe-1.5Sn (that is, the chemical composition is calculated by weight percentage: Al5%, Mo3% , V6%, Cr4%, Fe0.5%, Sn1.5%, the balance is Ti and unavoidable impurities) β titanium alloy tube blank, and then evenly apply lubricant (chlorine paraffin wax lubricant), and then use a cold rolling mill (LG90 two-roll cold rolling mill) to carry out one billet rolling, control the deformation of the billet rolling to 43%, and the rolling rate is 20 times / min , to obtain a rough-rolled tube billet with a specification of Ф108mm×6mm;

[0040] Step 2. Carrying out the first solution treatment of the rough-rolled tube billet described in step 1, the specific process is: placing the rough-rolled tube billet in an electric heating furnace at a temperature of (T β +20)°C for 30 minutes, t...

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Abstract

The invention provides a preparation method of a beta titanium alloy tube. The method comprises the following steps of: 1, performing one-pass cogging and rolling on the beta titanium alloy tube by using a cold pilger mill to obtain a rough rolled tube blank; 2, performing first solution treatment on the rough rolled tube blank; 3, removing defects on the inner and outer surfaces of the rough rolled tube blank, and then performing multi-pass precision rolling by using the cold pilger mill, and orderly performing second solution treatment, sandblasting treatment and acid pickling treatment after each pass of precision rolling to obtain a finish-rolled tube blank; and 4, performing aging treatment to obtain the beta titanium alloy tube having the outer diameter of 20 mm to 133 mm and the wall thickness of 1 mm to 5 mm. The preparation method provided by the invention is simple in preparation process, high in material utilization rate, low in production cost and short in production period; the beta titanium alloy tube prepared by using the preparation method provided by the invention is even in structure; the crystalline grains of the beta titanium alloy tube are fine and dispersed; and the beta titanium alloy tube is excellent in mechanical properties, and can be widely applied to the fields such as war industry, civilian use and the like.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy pipe processing, and in particular relates to a method for preparing a beta titanium alloy pipe. Background technique [0002] The β-titanium alloy refers to the formation of a metastable β-phase matrix during quenching treatment. During the aging treatment, the dispersed secondary α-phase is gradually precipitated on the β-matrix, so that the alloy obtains high strength. By adjusting the temperature and time of the aging treatment, the quantity and size of the secondary α phase can be controlled, so that the strength and plasticity of the β-type titanium alloy can be varied in a wide range, and the matching of strength and toughness can be obtained to meet different needs. High-strength β-titanium alloy pipe not only has high specific strength, but also has corrosion resistance and fatigue performance better than steel and aluminum. It is widely used in aerospace fields such as engine pipe...

Claims

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Application Information

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IPC IPC(8): C22C14/00C21D8/10
Inventor 赵彬戚运莲赵恒章郭荻子杜宇毛小南曾立英辛社伟李倩周伟
Owner 西安秦钛智造科技有限公司
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