Short-process manufacturing method for titanium and titanium alloy pipes

A titanium alloy and short-process technology, which is applied in the field of titanium alloy pipe preparation, can solve the problems of destroying the as-cast structure, etc., and achieve the effects of increasing deformation, high material utilization rate, and short processing cycle

Active Publication Date: 2021-05-11
江苏宇钛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process adopts an annular heating furnace with an improved heating method. Through the annular segmental heating method, combined with the forging deformation of the radial forging machine, the rapid, efficient, and short-process preparation of titanium and titanium alloy ingots is realized. However, this process only The purpose of destroying the as-cast structure can be achieved, and subsequent processing is required to further change the structure and properties in order to obtain a material with excellent structure

Method used

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  • Short-process manufacturing method for titanium and titanium alloy pipes
  • Short-process manufacturing method for titanium and titanium alloy pipes
  • Short-process manufacturing method for titanium and titanium alloy pipes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In this embodiment, a TC4 titanium alloy seamless pipe with a specification of ODФ300*IDФ150 mm is produced through this short-flow production process.

[0048] S1: Prepare a titanium alloy pipe blank with ODФ620mm*IDФ200mm.

[0049] S2: Apply an anti-oxidation coating on the surface of the tube blank, heat it to 1060°C, and keep it warm for 2 hours.

[0050] S3: Clamp the tube blank to the radial forging machine, and the first chuck clamps the tube blank. Prepare a Ф185mm mandrel and insert it into the tube blank. The hammer head is at the other end of the tube, and the mandrel at this end has a taper of 60°. The second chuck is clamped on the mandrel at the same end as the hammer head.

[0051] S4: The first radial forging, the deformation of the tube blank is 40%, the four hammerheads perform radial reciprocating motion, the hammering speed is 2000 times / min, the first chuck and the second chuck control the tube blank and mandrel Move along the direction of the cen...

Embodiment 2

[0059] In this embodiment, a TC4 titanium alloy seamless pipe with a specification of ODФ500*IDФ350 mm is produced through the short-flow production process.

[0060] S1: Prepare a titanium alloy pipe blank with ODФ820mm*IDФ400mm.

[0061] S2: Apply an anti-oxidation coating on the surface of the tube blank, heat it to 1080°C, and keep it warm for 4 hours.

[0062] S3: Clamp the tube blank to the radial forging machine, and the first chuck clamps the tube blank. Prepare a Ф380mm mandrel and insert it into the tube blank. The hammer head is at the other end of the tube, and the mandrel at this end has a taper of 60°. The second chuck is clamped on the mandrel at the same end as the hammer head.

[0063] S4: The first radial forging, the deformation of the tube blank is 80%, the four hammerheads perform radial reciprocating motion, the hammering speed is 1000 times / min, the first chuck and the second chuck control the tube blank and mandrel Move along the direction of the cent...

Embodiment 3

[0071] In this embodiment, a TC4 titanium alloy seamless pipe with a specification of ODФ200*IDФ150 mm is produced through the short-flow production process.

[0072] S1: Prepare a titanium alloy pipe blank with ODФ520mm*IDФ200mm.

[0073] S2: Apply an anti-oxidation coating on the surface of the tube blank, heat it to 1070°C, and keep it warm for 6 hours.

[0074] S3: Clamp the tube blank to the radial forging machine, and the first chuck clamps the tube blank. Prepare a Ф180mm mandrel and insert it into the tube blank. The hammer head is at the other end of the tube, and the mandrel at this end has a taper of 60°. The second chuck is clamped on the mandrel at the same end as the hammer head.

[0075] S4: The first radial forging, the deformation of the tube blank is 60%, the four hammerheads perform radial reciprocating motion, the hammering speed is 1500 times / min, the first chuck and the second chuck control the tube blank and mandrel Move along the direction of the cent...

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Abstract

The invention discloses a short-process manufacturing method for titanium and titanium alloy pipes. The method comprises the processes of pipe blank heating, multiple-time radial forging, double annealing and machining, so that the titanium alloy pipes are obtained. The pipe blank heating temperature is 80 DEG C-100 DEG C higher than the titanium alloy beta phase transformation point, and the heat preservation time is larger than or equal to 2h. The multiple-time radial forging process comprises three times of radial forging, wherein the hammering speed of the first time of radial forging is 1000-2000 times per minute, and the pipe blank deformation is controlled to be 40% to 80%; the hammering speed of the second time of radial forging is 2000-3000 times per minute, and the pipe blank deformation is controlled to be 30% to 60%; and the hammering speed of the third time of radial forging is 50-100 times per minute, and the pipe blank deformation is controlled to be 30% to 40%. The manufacturing method is short in processing period and low in cost, the titanium alloy pipes with equiaxial or binary structures and excellent mechanical properties can be directly obtained, and the material utilization rate is high.

Description

technical field [0001] The invention relates to the technical field of preparation of titanium alloy pipes, in particular to a short-flow preparation method for titanium and titanium alloy pipes. Background technique [0002] Titanium alloy seamless pipe is a long pipe made of titanium alloy material with a hollow section and no seams around it. It was originally mainly used to make aircraft engine compressor parts and structural parts of rockets, missiles and high-speed aircraft. Since the mid-1960s, it has been gradually applied to general industrial manufacturing fields such as electrodes in the electrolysis industry, condensers in power stations, heaters in petroleum refining and seawater desalination, and environmental pollution control devices. Therefore, titanium alloy seamless pipes have broad application prospects. [0003] At present, the traditional process of manufacturing titanium alloy seamless pipe first adopts hot forging process to refine the structure of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J1/06B21J7/14C22F1/18C21D1/26C21D9/08
CPCB21J5/002B21J1/06B21J7/14C22F1/183C21D1/26C21D9/08
Inventor 王长江陈小龙姬会爽沈礼锐黄响梁志杰周志杰朱云鹏
Owner 江苏宇钛新材料有限公司
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