Warm machining method for making titanium or Ti-alloy pipe

A titanium alloy tube, warm processing technology, applied in the direction of metal rolling, can solve the problems of poor internal and external surface quality, influence, large investment and so on

Inactive Publication Date: 2003-01-15
JIANGSU XINGRONG HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although its yield is higher than that of the piercing and rolling method (method 1), its internal and external surface quality is poor and its use is limited
And it needs a large extruder, which requires a huge investment, but it is rarely used now
Moreover, the above-mentioned three methods in the prior art have not treated the surface of the tube blank, and the defec

Method used

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Embodiment Construction

[0016] The present invention will be further described through the following specific embodiments, so that the technical solutions and features of the present invention to achieve its purpose can be understood more clearly.

[0017] One of the specific embodiments of the present invention, rolling is that the grade is TA 2 Titanium hollow tube produced by casting method. Rolling is carried out on the improved XR-SG90 three-roll planetary rolling tube. The initial size of the tube blank is φ90×25mm. Before rolling, the tube blank is processed by special milling equipment with three heads, and the cutting depth is 0.3mm, so that the surface of the tube blank is flawless and bright. Then preheat on-line, using argon protection electric induction coil to heat, so that the 200mm head of the tube blank is preheated to 900°C, and the rest is preheated to 500°C to 600°C. Then import the improved XR-SG90 three-roller planetary pipe mill for rolling processing. After the superimposi...

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Abstract

A warm machining technology for making Ti or Ti-alloy pipe includes such steps as machining surface of pipe blank, preheating to a temp between ambient temp and recrystallizing temp, high-speed rolling at temp higher than recrystallizing temp, and fast cooling. Its advantages are simple process, high utilization rate of material, low cost and high quality.

Description

technical field [0001] The invention belongs to the metal pipe rolling technology. Specifically speaking, it is a kind of continuous casting or perforated titanium and titanium alloy hollow tube billet, which is processed by surface machining, purified and preheated, using the principle of warm processing and deformation heat treatment. In rolling with high elongation coefficient and high deformation rate, after dynamic recrystallization occurs, online rapid cooling is performed to process and manufacture titanium and titanium alloy pipes. Background technique [0002] The existing methods for processing and manufacturing titanium and titanium alloy pipes include perforated billet rolling method, titanium and titanium alloy strip forming welding method and extrusion method. The piercing and rolling method is to cast titanium and titanium alloys into a solid billet, forge a long billet with a precision forging machine, heat it, send it to a 2-roll or 3-roll piercer to wear i...

Claims

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Application Information

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IPC IPC(8): B21B9/00B21B19/00B21B23/00B21C23/08B23P13/00C22F1/14
Inventor 肖克建田福生祁威
Owner JIANGSU XINGRONG HI TECH
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