Quick annealing method for titanium seamless pipe

A seamless tube, rapid annealing technology, applied in the improvement of process efficiency, furnace type, furnace and other directions, can solve the problems of high cost and low production efficiency, and achieve high production efficiency, small footprint, and low water consumption. Effect

Inactive Publication Date: 2007-12-12
WESTERN TITANIUM TECH
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Problems solved by technology

[0023] The purpose of the present invention is to provide a rapid annealing method for titanium seamless pipes, so as to solve the technical problems of low production efficiency and high cost in the background technology

Method used

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  • Quick annealing method for titanium seamless pipe

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Embodiment Construction

[0053] Technical principle of the present invention is:

[0054] Using the "skin effect" of intermediate frequency induction heating, the temperature of the titanium tube wall is rapidly raised above the recrystallization temperature of titanium, which inhibits the "recovery" process of the cold-worked metal when the temperature rises, and instantly releases the deformation energy stored in the metal during cold-work. Obtain a high-density recrystallization core and a high solid-state phase transition rate, and quickly complete the recrystallization process; then quickly cool the titanium tube to room temperature, inhibit the "grain growth" and "high temperature oxidation" process, and will usually be vacuum annealed The annealing process should be completed within a few minutes after completion in hundreds to thousands of minutes, so as to obtain a fine-grained structure and excellent mechanical properties, and form a layer of oxidation on the surface of the pipe that has a ce...

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Abstract

This invention discloses a method for annealing ti-seamless tubes. It comprises following steps: putting titanium tube into intermediate frequency induction annealing furnace orderly, heating to crystallization temperature rapidly when crossing intermediate frequency induction annealing furnace, restraining 'recovery' process, finishing recrystallization rapidly, cooling to room temperature fast, restraining ' grain growth' and high temperature oxidation. It only need several minutes for heating, thermal insulating and cooling for one titanium tube. It solves the technical problems of low production efficiency and high cost in background technology. The invention is characterized by automatic control, suitability for different length tubes annealing, mass or small production and excellent performance.

Description

technical field [0001] The invention relates to an annealing method during the processing of metal pipes, in particular to a rapid annealing method for titanium seamless pipes. Background technique [0002] Titanium and titanium alloy pipes will undergo work hardening during cold working such as rolling or drawing. Before further processing, they generally need to be annealed at a high temperature of 600°C to 800°C to eliminate their internal stress and restore the processing plasticity of the pipe, which is beneficial Further processing such as diameter reduction and wall reduction to achieve the required size. Most of the finished pipes are soft or semi-hard, and need to be fully annealed for recrystallization or incomplete annealed to eliminate internal stress before use. [0003] Due to the strong chemical activity of titanium and its alloys at high temperatures, they will interact with gas components such as oxygen, nitrogen, and hydrogen in the air or heating atmosphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C21D1/26C21D1/42C21D9/08C21D11/00
CPCY02P10/25
Inventor 奚正平邓炬李明强张树启邓超尉北玲
Owner WESTERN TITANIUM TECH
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