Method for producing titanium alloy pipe

A technology of titanium alloy tubes and production methods, applied in the direction of furnace types, furnaces, heat treatment furnaces, etc., can solve the problems of unfavorable cost saving, waste of energy, etc., and achieve the effects of reducing process passes, high production efficiency, and saving production costs

Active Publication Date: 2014-11-26
常熟市异型钢管有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current titanium alloy cold rolling production process, oxidation annealing or vacuum annealing is usually carried out after each cold rolling pass, once heated to an annealing temperature of 600-900°C, kept for 1-3 hours, and then air-cooled to room temperature, and so on. Multi-pass rolling and annealing are required from the blank tube to the finished product, which wastes energy and is not conducive to cost saving

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Carry out dimensional inspection, surface inspection, and quality inspection on the raw material tube billet, and use a direct reading spectrometer 750B to analyze the chemical composition and elements of the titanium tube, and the mass components are Fe0.20%, C0.08%, N0.03%, H0.015% , O0.18%, and the balance is Ti. The inspector will inspect the surface one by one, mark the places with cracks, folds, scars, pits and other defects, and carry out local grinding, so that the removed parts are smooth and have no edges and corners. Then the raw material is processed by two-roll rolling. During the processing, an appropriate amount of chlorinated paraffin can be added to reduce the friction coefficient and provide corresponding rolling force. The rolling energy consumption is low, the surface brightness is high, and the wall thickness of the titanium tube is uniform. . Degreasing and pickling is carried out on the rolled titanium alloy pipe, the mass ratio of the pickling s...

Embodiment 2

[0012] Carry out dimensional inspection, surface inspection, and quality inspection on the raw material tube billet, and use a direct reading spectrometer 750B to analyze the chemical composition and elements of the titanium tube. The mass components are Fe0.16%, C0.07%, N0.03%, and H0.013%. , O0.16%, and the balance is Ti. The inspector will inspect the surface one by one, mark the places with cracks, folds, scars, pits and other defects, and carry out local grinding, so that the removed parts are smooth and have no edges and corners. Then the raw material is processed by two-roll rolling. During the processing, an appropriate amount of chlorinated paraffin can be added to reduce the friction coefficient and provide corresponding rolling force. The rolling energy consumption is low, the surface brightness is high, and the wall thickness of the titanium tube is uniform. . Degreasing and pickling is carried out on the rolled titanium alloy pipe, the mass ratio of the pickling ...

Embodiment 3

[0014] Carry out dimensional inspection, surface inspection, and quality inspection on the raw material tube billet, and use a direct reading spectrometer 750B to analyze the chemical composition and elements of the titanium tube. The mass components are Fe0.08%, C0.04%, N0.02%, and H0.009%. , O0.10%, and the balance is Ti. The inspector will inspect the surface one by one, mark the places with cracks, folds, scars, pits and other defects, and carry out local grinding, so that the removed parts are smooth and have no edges and corners. Then the raw material is processed by two-roll rolling. During the processing, an appropriate amount of chlorinated paraffin can be added to reduce the friction coefficient and provide corresponding rolling force. The rolling energy consumption is low, the surface brightness is high, and the wall thickness of the titanium tube is uniform. . Degreasing and pickling is carried out on the rolled titanium alloy pipe, the mass ratio of the pickling ...

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PUM

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Abstract

The invention discloses a method for producing a titanium alloy pipe. The method comprises the following steps of: performing material inspection, coping and blanking, two-roll cold rolling, oil removing, acid washing, coping and shaving, primary vacuum annealing, three-roll cold rolling, oil removing, acid washing, secondary vacuum annealing, straightening, cutting and finished product acid washing, wherein the primary vacuum annealing and the secondary vacuum annealing have the same process step; feeding a titanium alloy pipe into a vacuum annealing furnace, and heating to 340-360 DEG C; preserving heat for 2-2.5 hours; heating to 650-700 DEG C; preserving heat for 2.5-3 hours; cooling along with a furnace to 400-450 DEG C; and discharging and cooling to the room temperature. In the method, a vacuum annealing way of two-stage heating and two-stage cooling is adopted, the macrostructure phase transformation of the titanium alloy pipe is uniform, crystal grains are refined, the mechanical performance is high, an annealing oxide film is not needed, the elongation rate of the titanium alloy pipe can be up to 170 percent, process steps are reduced, the production efficiency is increased, and production cost is saved.

Description

technical field [0001] The invention relates to a production method of an alloy pipe, in particular to a production method of a titanium alloy pipe. Background technique [0002] Titanium alloy tubes are widely used in petroleum and petrochemical industries; aerospace fields; products of military enterprises; nuclear power industry; centrifuges and reactors in pharmaceutical factories, etc. Titanium alloy tubes have high mechanical properties, excellent stamping performance, and good cutting performance, and have high corrosion resistance to chlorides, sulfides and ammonia. In the current titanium alloy cold rolling production process, oxidation annealing or vacuum annealing is usually carried out after each cold rolling pass, once heated to an annealing temperature of 600-900°C, kept for 1-3 hours, and then air-cooled to room temperature, and so on. Multi-pass rolling and annealing are required from the blank tube to the finished product, which wastes energy and is not con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/06C21D1/26C21D1/773C21D9/08C22F1/18
Inventor 张根明殷正新
Owner 常熟市异型钢管有限公司
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