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Manufacturing method for ultrathin-wall titanium tubing

A manufacturing method and ultra-thin-wall technology, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of uneven wall thickness, low pipe plasticity, high cost, etc., and achieve simple production process and good surface quality , the effect of low production cost

Active Publication Date: 2013-01-16
西安稀有金属材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tube billet-machining method requires multi-pass machining of the prepared thin-walled titanium tube to obtain an ultra-thin-walled tube. The process is long, the cost is high, the deformation of the machine is large, and the dimensional accuracy is difficult to guarantee. What is more important is the plasticity of the tube. Not high, it is difficult to meet the needs of subsequent bellows forming
Tube billet-spinning method is difficult to master due to the high deformation resistance and severe springback of titanium alloy, low yield and high cost, and it is difficult to guarantee dimensional tolerance and surface quality by hot spinning
The traditional multi-roll finish rolling method for pipes is easy to crack, difficult to feed, and easy to insert the head and tail, so the rolling process cannot be established, even if the pipe is barely rolled, the surface quality is poor and the wall thickness is uneven, which cannot meet the quality requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Manufacturing of Φ15mm×0.10mm ultra-thin-wall TA2 pipe:

[0020] Step 1. Choose a TA2 strip with a thickness of 0.15mm that meets the GB / T3622-1999 standard, and prepare a TA2 welded pipe of Φ17.1mm×0.15mm by conventional rolling-welding, and perform a vacuum at 500℃ / 1h on the welded pipe Heat treatment to obtain the heat-treated TA2 pipe, and then clean the surface defects of the heat-treated TA2 pipe (scrape to remove surface defects) to obtain a tube blank with a yield strength of 250MPa~260MPa and an elongation of 26%~28%;

[0021] Step 2. Apply lubricant (conventional lubricant used for rolling pipes) evenly on the inner surface of the tube blank described in step 1, and then use a cold rolling tube mill (LD15 cold rolling tube mill or LD30 cold rolling tube mill) to apply The tube blank after the lubricant is rolled in one pass. During the rolling process, a Φ15mm roll and a Φ14.8mm rolling mandrel are used. The tube blank feed rate is 2mm / time, and the rolling speed i...

Embodiment 2

[0026] Manufacturing of Φ25.3mm×0.20mm ultra-thin-walled TA18 pipe:

[0027] Step 1. Choose a cold-rolled TA18 seamless pipe with a chemical composition that meets the GB / T3620.1-2007 standard and a specification of Φ26×0.35mm. The pipe is subjected to 700℃ / 2h vacuum heat treatment to obtain a heat-treated TA18 pipe, and then the heat-treated state Surface defect cleaning (scraping to remove surface defects) of the TA18 pipe, yielding a tube blank with a yield strength of 530MPa and an elongation of 15% to 18%;

[0028] Step 2: Apply lubricant (conventional lubricant used for rolling pipes) evenly on the inner surface of the tube blank described in Step 1, and then use a cold rolling tube mill (LD30 cold rolling tube mill) to apply lubricant to the tube blank Carry out one round of rolling. During the rolling process, Φ25.3mm rolls and Φ24.86mm rolling mandrels are used. The tube billet feed rate is 2.5mm / time, and the rolling speed is 60 times / min. The latter tube blanks are sequ...

Embodiment 3

[0033] Manufacture of Φ50mm×0.50mm ultra-thin wall TA10 pipe:

[0034] Step 1. Select the heat-treated TA10 seamless pipe of Φ51.3mm×1.0mm whose performance meets the requirements of GB / T3625-2007 standard, and clean the surface of the TA10 pipe (scraping to remove surface defects), and the yield strength is 310MPa~ Tube blank with 315MPa and elongation of 19%~20%;

[0035] Step 2. Apply lubricant (conventional lubricant used for rolling pipes) evenly on the inner surface of the tube blank described in Step 1, and then use a cold rolling tube mill (LD60 cold rolling tube mill) to apply lubricant to the tube blank Carry out one round of rolling. During the rolling process, Φ50mm rolls and Φ49mm rolling mandrels are used. The tube feed rate is 3.0mm / time, and the rolling speed is 40 times / min. Then the rolled tube Degreasing, pickling and vacuum heat treatment are carried out in sequence to obtain an ultra-thin-walled TA10 pipe with an outer diameter of 50mm and a wall thickness of ...

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Abstract

The invention discloses a manufacturing method for ultrathin-wall titanium tubing. The method includes: firstly, deseaming a titanium tube with the wall thickness of 0.15mm-1.0mm to obtain a tube billet; and secondly, uniformly daubing lubricant on the inner surface of the tube billet prior to performing one-time rolling for the tube billet daubed with the lubricant by a cold pilger mill, and then sequentially performing oil removing, acid washing and vacuum heat treatment for the rolled tube billet so that the ultrathin-wall titanium tubing with the external diameter of 15mm-50mm, the wall thickness of 0.1mm-0.5mm and the ratio of the wall thickness to the external diameter not larger than 0.02 is obtained. The ultrathin-wall titanium tubing is manufactured smoothly by a traditional cold rolling method and by means of controlling mechanical property, rolling Q values, rolling process parameters, tube billet internal diameter and mandrel clearance, the manufactured tubing is good in surface quality, high in plasticity and uniform in size, and the method is suitable for production of various ultrathin-wall titanium tubings with the cold rolling deformability.

Description

Technical field [0001] The invention belongs to the technical field of metal pipe pressure processing, and specifically relates to a method for manufacturing an ultra-thin-walled titanium pipe. Background technique [0002] With the rapid development of my country's national economy and science and technology, titanium alloy material preparation technology and product quality have been greatly improved, which has driven the rapid expansion of the use of titanium alloys. Corrugated pipe expansion joints for pipe connection compensation in bellows-like elastic elements require pressure resistance, corrosion resistance and a certain amount of compensation. The properties of titanium alloy materials, such as working temperature, cyclic stress, corrosion resistance and process adaptability, are all suitable as bellows-like elastic elements in various industrial fields. However, titanium alloy has high resistance to cold deformation, serious springback, low plasticity, and poor cold w...

Claims

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Application Information

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IPC IPC(8): B21B17/02B21B37/00
Inventor 杨英丽吴金平郭荻子罗媛媛卢亚锋赵恒章赵彬苏航标
Owner 西安稀有金属材料研究院有限公司
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