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A kind of forming method of thin-diameter thin-walled high-strength beta titanium alloy pipe

A technology of beta titanium alloy and forming method, which is applied in the direction of furnace type, furnace, heat treatment equipment, etc., to achieve the effect of low room temperature strength, high geometric dimension accuracy and strong cold working ability

Active Publication Date: 2017-05-17
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is an urgent need to develop a cold forming process for titanium alloy thin-diameter thin-walled pipes, which has not been reported at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The β titanium alloy pipe to be formed in this embodiment is a thin-diameter thin-walled high-strength β-titanium alloy pipe with a nominal composition of Ti-13Nb-13Zr, an outer diameter of 4.0 mm, and a wall thickness of 0.25 mm; the thin-walled high-strength thin-diameter pipe of this embodiment The forming method of β titanium alloy pipe comprises the following steps:

[0027] Step 1, solid solution treatment: the outer diameter is 5.0mm, the beta titanium alloy tube billet that wall thickness is 0.25mm is placed in the tubular annealing furnace, at a temperature of (T β +60) °C under the condition of heat preservation for 30min, after being water-cooled out of the furnace, the β titanium alloy tube blank after solution treatment is obtained; the T β is the β-phase transition temperature of the β-titanium alloy billet, T β The unit of is ℃; the solution treatment is preferably carried out under inert atmosphere protection or vacuum conditions to prevent oxidation of...

Embodiment 2

[0037] The β titanium alloy pipe to be formed in this embodiment is a thin-diameter thin-walled high-strength β titanium alloy pipe with a nominal composition of Ti-13Nb-13Zr, an outer diameter of 2 mm, and a wall thickness of 0.15 mm; The forming method of the titanium alloy pipe comprises the following steps:

[0038] Step 1, solid solution treatment: the outer diameter is 2.5mm, the inner diameter is 0.15mm beta titanium alloy tube billet is placed in the tubular annealing furnace, at a temperature of (T β +50) ° C under the condition of heat preservation for 20min, after being air-cooled out of the furnace, the β titanium alloy tube blank after solution treatment is obtained; the T β is the β-phase transition temperature of the β-titanium alloy billet, T β The unit of is ℃; the solution treatment is preferably carried out under inert atmosphere protection or vacuum conditions to prevent oxidation of the β titanium alloy tube blank;

[0039] Step 2, surface treatment: imm...

Embodiment 3

[0048] The β titanium alloy pipe to be formed in this embodiment is a thin-diameter thin-walled high-strength β titanium alloy pipe with a nominal composition of Ti-25Nb-3Zr-3Mo-2Sn (TLM), an outer diameter of 1.0 mm, and a wall thickness of 0.1 mm; Embodiment The forming method of thin-diameter thin-walled high-strength beta titanium alloy pipe comprises the following steps:

[0049] Step 1, solid solution treatment: place the beta titanium alloy tube blank with an outer diameter of 1.5 mm and a wall thickness of 0.1 mm in a tubular annealing furnace, protected in an inert atmosphere, and the temperature is (T β +20) ° C under the condition of heat preservation for 60min, after being water-cooled out of the furnace, the β titanium alloy tube blank after solution treatment is obtained; the T β is the β-phase transition temperature of the β-titanium alloy billet, T β The unit of is ℃; the solution treatment is preferably carried out under inert atmosphere protection or vacuum ...

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Abstract

The invention provides a molding method for a beta titanium alloy tube with a small diameter, a thin wall and high strength. The molding method comprises the following steps that firstly, solution treatment is conducted on a beta titanium alloy tube blank; secondly, the beta titanium alloy tube blank obtained after the solution treatment is immersed into etching treatment fluid for etching, and drying is conducted after ultrasonic cleaning; thirdly, pre-drawing lubrication is conducted; fourthly, multi-mold drawing processing is conducted; fifthly, after the outer diameter and the wall thickness of the drawn beta titanium alloy tube blank are detected; sixthly, oil removal, oxide layer removal and straightening treatment are conducted in sequence; and seventhly, reinforcing treatment is conducted, and the beta titanium alloy tube with the small diameter, the thin wall and the high strength is obtained with the outer diameter of 1.0 mm-5.0 mm, the wall thickness of 0.1 mm-0.3 mm and tensile strength of 800 MPa-1100 MPa. The beta titanium alloy tube molded by adopting the molding method is good in surface quality, high in geometry dimensional precision and good in mechanical property, and belongs to the high-strength beta titanium alloy category.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material processing, and in particular relates to a forming method of a thin-diameter thin-walled high-strength beta titanium alloy pipe. Background technique [0002] Titanium alloy has the characteristics of high specific strength, excellent corrosion resistance, non-magnetic, good biocompatibility, etc. It is widely used in the fields of weaponry, aerospace, medical equipment, etc. Its main products are rods, tubes, forgings, wire wait. Compared with titanium alloy rods, strips, plates and other products, seamless metal pipes are products with long process and complicated processing technology, especially the technology for preparing high-precision, high-performance, low-cost thin-diameter thin-walled pipes (capillaries) It is more difficult. At present, the development of metal capillary in China is relatively backward, and only some low-strength, high-plastic materials can be produce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18C21D9/08C21D8/10
Inventor 刘汉源于振涛张亚峰赵利渊何卫敏王昌程军
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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