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Titanium alloy pipe and manufacturing method

A manufacturing method, titanium alloy technology, applied in the direction of metal rolling, etc., can solve problems such as difficulty in meeting application requirements, limited pipe length, long production process, etc., and achieve low production cost, reasonable component distribution ratio, and large single weight Effect

Active Publication Date: 2013-06-12
WUCHANG SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bar material - mechanical processing method has a very low yield, which is suitable for pipes with small quantity and short length; extruded tube billet - mechanical processing method has long production process, high cost and low yield. For pipes with an outer diameter of 140-300mm, it is necessary Large-scale extruders and supporting large-scale complete sets of tools and dies have high cost and low yield, and the length of the produced pipes is limited, which is difficult to meet the application requirements; forging (or rod-machining) is a thick-walled cylinder-with core The rod precision forging method has a long production process, high cost, and low yield. It requires a large-scale professional precision forging machine and specially prepared heat-resistant steel mandrels to match it.
The above three methods are not suitable for the manufacture of titanium alloy seamless pipes with longer length and outer diameter greater than 140mm

Method used

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  • Titanium alloy pipe and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A titanium alloy seamless pipe, the alloy composition of the pipe is: Al5.0%, Zr1.0%, Nb2.0%, Mo0.3%, and the impurity elements are controlled according to the following requirements: Fe≤0.25%, C≤0.10 %, Si≤0.15%, N≤0.05%, H≤0.015%, O≤0.20%, the balance is Ti; the unit weight of the pipe is 165Kg, and the specification is Φ145mm×15mm.

[0026] Its specific preparation process is as follows:

[0027] Step 1. Prepare raw materials such as sponge titanium, sponge zirconium, aluminum foil, NbTi, AlMo master alloy, etc., and prepare the chemical composition to meet Al5.0%, Zr1.0%, Nb2.0%, Mo0 through two vacuum consumable arc melting .3%, impurity elements are controlled according to the following requirements Fe≤0.25%, C≤0.10%, Si≤0.15%, N≤0.05%, H≤0.015%, O≤0.20%, the balance is Ti alloy ingot, Adopt conventional titanium alloy bar production method to produce Φ140±1.5mm polished bar blank, and conduct ultrasonic non-destructive testing on the bar blank;

[0028] Step 2....

Embodiment 2

[0035] A titanium alloy seamless pipe, the alloy composition of the pipe is: Al6.0%, Zr2.5%, Nb3.0%, Mo1.0%, and the impurity elements are controlled according to the following requirements: Fe≤0.25%, C≤0.10 %, Si≤0.15%, N≤0.05%, H≤0.015%, O≤0.20%, the balance is Ti; the unit weight of the pipe is 160Kg, and the specification is Φ185×17mm.

[0036] Its specific preparation process is as follows:

[0037] Step 1. Prepare raw materials such as sponge titanium, sponge zirconium, aluminum foil, NbTi, AlMo master alloy, etc., and prepare the chemical composition satisfying Al6.0%, Zr2.5%, Nb3.0%, Mo1. 0%, impurity elements are controlled according to the following requirements: Fe≤0.25%, C≤0.10%, Si≤0.15%, N≤0.05%, H≤0.015%, O≤0.20%, the balance is titanium alloy ingots of Ti, using The conventional titanium alloy bar production method produces a Φ175±2.0mm polished bar blank, and conducts ultrasonic non-destructive testing on the bar blank;

[0038] Step 2. Cut the titanium allo...

Embodiment 3

[0045] A titanium alloy seamless pipe, the alloy composition of the pipe is: Al7.5%, Zr2.0%, Nb3.5%, Mo1.5%, and the impurity elements are controlled according to the following requirements: Fe≤0.25%, C≤0.10 %, Si≤0.15%, N≤0.05%, H≤0.015%, O≤0.20%, the balance is Ti; the unit weight of the pipe is 480Kg, and the specification is Φ219×20mm.

[0046] Its specific preparation process is as follows:

[0047] Step 1. Prepare raw materials such as sponge titanium, sponge zirconium, aluminum foil, NbTi, AlMo master alloy, etc., and prepare the chemical composition satisfying Al7.5%, Zr2.0%, Nb3.5%, Mo1. 5%, impurity elements are controlled according to the following requirements: Fe≤0.25%, C≤0.10%, Si≤0.15%, N≤0.05%, H≤0.015%, O≤0.20%, the balance is titanium alloy ingots of Ti, using Conventional titanium alloy bar production method, producing Φ205±2.5mm polished or polished bar blanks, and performing ultrasonic non-destructive testing on the bar blanks;

[0048] Step 2. Cut the t...

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Abstract

The invention belongs to the technical field of titanium alloy pipe pressure processing, and specifically relates to a titanium alloy pipe and a manufacturing method. The pipe is a seamless pipe, the outer diameter of the pipe is 140-300mm, and the wall thickness is 10-30mm. The manufacturing method is as follows: manufacturing a titanium alloy stick blank, machining the outer surface of the stick blank, and performing ultrasonic non-destructive testing on the stick blank; cutting the qualified stick blank in fixed length according to the weight requirement on the finished product pipe to manufacture a bar, machining at the centre of the head part of one end of the rod to obtain a guiding hole and an excircle chamfer, uniformly coating a layer of titanium alloy antioxidant protective coating on the surface of the bar, heating to 950-1100 DEG C after the bar coating is dried, and then keeping the temperature so that the temperature of the bar is uniform and consistent, rolling the bar on a cone mill. The titanium alloy pipe provided by the invention is simple in production process, short in flow, low in production cost and high in yield, the produced pipe is good in surface quality and high in wall thickness uniformity.

Description

technical field [0001] The invention belongs to the technical field of pressure processing of titanium alloy pipes, and in particular relates to a titanium alloy pipe and a manufacturing method. Background technique [0002] With the rapid development of my country's national economy and science and technology, the preparation technology and product quality of titanium alloy materials have been greatly improved, which has led to the rapid expansion of the application field of titanium alloys. In recent years, the demand for high-strength titanium alloy large-diameter pipes has become more and more many. [0003] Especially a kind of titanium alloy (the weight percentage is composed of: Al(5.0~7.5)%, Zr(1.0~3.5)%, Nb(2.0~4.5)%, Mo(0.3~2.0)%, Fe≤0.25%, C ≤0.10%, Si≤0.15%, N≤0.05%, H≤0.015%, O≤0.20%, the balance is Ti), because of its high strength and high toughness, it has been used as a bar, forging , pipes and other forms are used in the shipbuilding field, and the amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00B21B19/02C21D8/10
Inventor 杨英丽张日恒苏航标胡宏杰吴金平杜涛
Owner WUCHANG SHIPBUILDING IND
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