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A kind of titanium alloy (tc11) rolling tube and its preparation method

A technology of TC11 and rolling tubes, which is applied in the field of TC11 rolling tubes and its preparation, can solve problems such as difficult processing, and achieve the effects of good metal internal organization, reduced power consumption costs, and excellent performance

Active Publication Date: 2016-12-21
忠世高新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of titanium alloys, there is an increasing demand for titanium alloys with high strength, high toughness, high temperature resistance and corrosion resistance, especially the demand for titanium alloy pipes is increasing, and the processing of titanium alloy pipes is becoming more and more difficult. Most of the titanium alloy TC11 pipes are used in oil fields, nuclear power plants, chemical industry and other industries, but the current titanium alloy TC11 pipes are usually coiled and welded by plates, hollowed out by bars, and hinged inside the car after cross-rolling and perforation. At present, there is no such pipe in China. A company capable of rolling titanium alloy (TC11) pipes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Concrete preparation process is as follows:

[0024] 1. TC11 tube blank obtained by cross-rolling piercing Add graphite lubricant to the inner surface of the billet and mandrel (metal material, solid round bar, the rod specification depends on the inner diameter of the billet or finished tube), and carry out warm (hot) rolling. The online heating temperature is 750 ° C. The first The rolling deformation of each pass is 30%, and the rolling speed is 35 times / min. After the rolled tube is air-cooled, it is oxidized and annealed at 600°C for 2 hours. After washing, check for defects and repair and scrape defects;

[0025] 2. 50 inner hinges on one side of the tube billet from the first pass, graphite lubricant is added to the inner surface and mandrel, and warm (hot) rolling is carried out. The online heating temperature is 700°C, and the rolling deformation of the second pass The temperature is 35%, the rolling speed is 30 times / min, and the rolled tube billets are ox...

Embodiment 2

[0031] Concrete preparation process is as follows:

[0032] 1. TC11 tube blank obtained by cross-rolling piercing The inner surface of the billet and mandrel (metal material, solid round bar, the rod specification depends on the inner diameter of the billet or the finished tube) is added with graphite lubricant, and the warm (hot) rolling is carried out. The online heating temperature is 1200 ° C. The first The rolling deformation of each pass is 45%, and the rolling speed is 40 times / min. After the rolled tube is air-cooled, it is oxidized and annealed at 900°C for 3 hours. After washing, check for defects and repair and scrape defects;

[0033]2. 50 inner hinges on one side of the tube billet from the first pass, graphite lubricant is added to the inner surface and mandrel, and warm (hot) rolling is carried out. The online heating temperature is 1200°C, and the rolling deformation of the second pass The rolling speed is 40%, the rolling speed is 35 times / min, and the rol...

Embodiment 3

[0039] Concrete preparation process is as follows:

[0040] 1. TC11 tube blank obtained by cross-rolling piercing Add paraffin wax and molybdenum disulfide lithium-based grease lubricants to the inner and outer surfaces of the tube billet, and carry out cold rolling. The rolling deformation in the first pass is 15%, and the rolling speed is 20 times / min. After washing and pickling, wash with water, 50 internal hinges on one side, and carry out oxidation annealing temperature at 900 ° C for 2.5 hours. After oxidation annealing, the tube blank must be washed with alkali, washed with water after alkali wash, and inspected for defects and repaired.

[0041] 2. Add paraffin wax and molybdenum disulfide lithium-based grease lubricant to the inner and outer surfaces of the tube billet in the first pass, and carry out cold rolling. The rolling deformation in the second pass is 30%, and the rolling speed is 30 times / min. , the rolled tube billet is pickled, pickled and then washed w...

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Abstract

The present invention relates to a titanium alloy, specifically a titanium alloy TC11 finished tube and a preparation method thereof. The alloy composition by weight is: Ti balance, Al(5.8~7.0)%, Si(0.2~0.35)%, Zr( 0.8~2.0), Mo(2.8~3.8)%, Fe≤0.1%, C≤0.05%, N≤0.04%, H≤0.0125%, O≤0.15%; properties of titanium alloy (TC11) tube prepared by the above method The tensile strength is 800~1300MPa, the elongation is 8~25%, the metallographic structure is uniform, and there are two metallographic structures of stress relief annealing and complete recrystallization annealing.

Description

technical field [0001] The invention relates to a titanium alloy pipe and its preparation, in particular to a TC11 rolled pipe and its preparation method. Background technique [0002] With the continuous development of titanium alloys, there is an increasing demand for titanium alloys with high strength, high toughness, high temperature resistance and corrosion resistance, especially the demand for titanium alloy pipes is increasing, and the processing of titanium alloy pipes is becoming more and more difficult. Most of the titanium alloy TC11 pipes are used in oil fields, nuclear power plants, chemical industry and other industries, but the current titanium alloy TC11 pipes are usually coiled and welded by plates, hollowed out by bars, and hinged inside the car after cross-rolling and perforation. At present, there is no such pipe in China. A company that can roll out titanium alloy (TC11) pipes. Contents of the invention [0003] The purpose of the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22F1/18C21D8/10
Inventor 张忠世郭淑君张政宏
Owner 忠世高新材料股份有限公司
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