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A kind of titanium alloy tube and its production method

A production method and technology for titanium alloy pipes, which are applied in the directions of pipes, rigid pipes, metal rolling, etc., can solve the problems of many inner surface defects of titanium alloy pipes, difficult grinding of titanium alloy pipes, and low qualified rate of flaw detection, so as to avoid repeated problems. Oxidation and outgassing, avoiding defects, and low inspection pass rate

Active Publication Date: 2016-08-24
PANGANG GROUP CHENGDU STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the titanium alloy tube is produced by heating furnace → skew rolling piercing → pipe rolling → sizing → cooling bed cooling process, due to the low heating temperature (about 1000 ℃), the capillary temperature from the perforated capillary to the front of the rolling mill is low (generally 850-900 ℃) ℃), when rolling, the life of the mandrel is low, the inner surface of the rolled titanium alloy tube has many defects, the pass rate of flaw detection is low, and it is difficult to grind the inner surface of the small-sized titanium alloy tube

Method used

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  • A kind of titanium alloy tube and its production method
  • A kind of titanium alloy tube and its production method
  • A kind of titanium alloy tube and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Example 1: Production Specifications Titanium alloy tube

[0092] Process flow: Packaging after passing.

[0093] The specific production method is as follows: first, the titanium alloy The round blank is placed in an inclined-bottom heating furnace with a micro-oxidizing atmosphere with a volume concentration of 2-5% of the residual oxygen in the furnace and heated to a temperature of 970-990°C and kept at this temperature for 25 minutes to obtain a heated titanium alloy round billet. Blank. made of titanium alloy The round billet is obtained by the manufacturer through smelting, forging and machining in a vacuum consumable electric arc furnace. The quality meets the requirements of cross-rolling and piercing. Its chemical composition is calculated by weight percentage: Al: 6.39%, V: 4.07%, Fe: 0.11 % and the balance Ti, the chemical composition complies with the provisions of GB / T3620.2-2007.

[0094] After the heated titanium alloy round billet comes ou...

Embodiment 2

[0107] Example 2: Production Specifications Titanium alloy tube

[0108] Process flow: Packaging after passing.

[0109] The specific production method is as follows: first, the titanium alloy The round billet is placed in an inclined-bottom heating furnace with a micro-oxidizing atmosphere with a volume concentration of 2-5% of residual oxygen in the furnace and heated to a temperature of 970-990°C and kept at this temperature for 25 minutes to obtain a heated titanium alloy round billet. Blank. made of titanium alloy The round billet is obtained by the manufacturer through smelting, forging and machining in a vacuum consumable electric arc furnace. The quality meets the requirements of cross-rolling and piercing. Its chemical composition is calculated by weight percentage: Al: 6.39%, V: 4.07%, Fe: 0.11 % and the balance Ti, the chemical composition complies with the provisions of GB / T3620.2-2007.

[0110] After the heated titanium alloy round billet comes out o...

Embodiment 3

[0118] Example 3: Production Specifications Titanium alloy tube

[0119] Process flow: Packaging after passing.

[0120] The specific production method is as follows: first, the titanium alloy The round billet is placed in an inclined-bottom heating furnace with a volume concentration of 2-5% of the residual oxygen in the furnace and heated to a temperature of 970-990°C and kept at this temperature for 20 minutes to obtain a heated titanium alloy round billet. Blank. made of titanium alloy The round billet is obtained by the manufacturer through smelting, forging and machining in a vacuum consumable electric arc furnace. The quality meets the requirements of cross-rolling and piercing. Its chemical composition is calculated by weight percentage: Al: 6.39%, V: 4.07%, Fe: 0.11 % and the balance Ti, the chemical composition complies with the provisions of GB / T3620.2-2007.

[0121] After the heated titanium alloy round billet comes out of the furnace, it is transport...

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Abstract

The invention relates to a titanium alloy tube and a production method thereof. The method comprises the following steps: heating by using an inclined-bottom type heater furnace; cross piercing; sizing; straightening at a temperature; primary acid pickling; cold rolling; annealing; straightening at a temperature and secondary acid pickling. The titanium alloy tube produced by the method has the following characteristics that for the titanium alloy tube with the external diameter of 60.32-88.90mm, the external diameter tolerance ranges from 0 to 0.79mm, the wall thickness tolerance is larger than or equal to -10 percent, and the requirements of the design size tolerance of the external diameter tolerance are met; the yield strength is 758-965mm, the tensile strength is larger than or equal to 862MPa, the elongation is larger than or equal to 11.0 percent, and the titanium alloy tube conforms to the performance of 110ksi steel grade.

Description

【Technical field】 [0001] The invention belongs to the technical field of production of titanium alloy pipes, and in particular relates to a titanium alloy pipe and a production method thereof. 【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 has good corrosion resistance, and a uniform and dense oxide film is formed immediately on the surface of titanium in the atmosphere, which has the ability to resist erosion by various media. Generally, titanium has good corrosion resistance in oxidizing and neutral media, and has better corrosion resistance in seawater, wet chlorine and chloride solutions. [0003] If the titanium alloy tube is produced by heating furnace → skew rolling piercing → pipe rolling → sizing → cooling bed cooling process, due to the low heating temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00F16L9/02
CPCB21B23/00C23G3/04
Inventor 曾理成海涛边华川江健邹友富郭元蓉刘仁明彭海龙
Owner PANGANG GROUP CHENGDU STEEL & VANADIUM
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