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Preparation method of large-diameter hydrogen embrittlement prevention titanium alloy spring

A titanium alloy spring and large-diameter technology, which is applied in the direction of manufacturing springs from wires, manufacturing tools, and heat treatment equipment, can solve problems such as unsatisfactory corrosion resistance of titanium alloys, avoid hydrogen embrittlement, improve surface quality, Effect of improving lubricating performance

Active Publication Date: 2021-11-26
西安赛福斯材料防护有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to prevent hydrogen embrittlement of titanium, commonly used surface treatment methods include physical vapor deposition, electroplating, etc., but the corrosion resistance of titanium alloys after surface treatment by these techniques is not satisfactory

Method used

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  • Preparation method of large-diameter hydrogen embrittlement prevention titanium alloy spring

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Experimental program
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Embodiment 1

[0031] This embodiment includes the following steps:

[0032] Step 1. Forging TB9 titanium alloy by free forging process, and the temperature used for forging is 1100°C, the holding time is 3h, and then rolling at 800°C for 120min to obtain a hot-rolled titanium alloy billet; the TB9 titanium alloy is made of The composition of the following mass content: Al 3.0%, V 8.5%, Cr 5.5%, Zr 4.5%, Mo 3.5%, Pd 0.1%, the total mass content of impurities including Fe, C, N, H, O is 1.05%, The balance is Ti;

[0033] Step 2, performing solution treatment on the hot-rolled titanium alloy billet obtained in step 1 at 890° C. for 30 minutes, and then peeling and polishing to obtain a titanium alloy wire with a diameter of 5 mm;

[0034] Step 3, coiling the titanium alloy wire obtained in step 2, then performing an aging treatment at 480° C. for 12 hours, and then performing a shot blasting treatment to obtain a titanium alloy spring wire;

[0035] Step 4. Put the titanium alloy spring wire o...

Embodiment 2

[0042] This embodiment includes the following steps:

[0043] Step 1. Forging TB9 titanium alloy by free forging process, and the temperature used for forging is 1150°C, the holding time is 1.5h, and then rolling at 880°C for 90 minutes to obtain a hot-rolled titanium alloy billet; the TB9 titanium alloy It is composed of the following components by mass content: Al 4.0%, V 7.5%, Cr 6.5%, Zr 3.5%, Mo 4.5%, Pd 0.08%, and the total mass content of impurities including Fe, C, N, H, O is 1.05% , the balance is Ti;

[0044] Step 2, performing solution treatment on the hot-rolled titanium alloy billet obtained in step 1 at 900° C. for 30 minutes, and then peeling and polishing to obtain a titanium alloy wire with a diameter of 25 mm;

[0045] Step 3, coiling the titanium alloy wire obtained in step 2, then performing an aging treatment at 520° C. for 8 hours, and then performing a shot blasting treatment to obtain a titanium alloy spring wire;

[0046] Step 4. Put the titanium all...

Embodiment 3

[0053] This embodiment includes the following steps:

[0054] Step 1. Forging TB9 titanium alloy by free forging process, and the temperature used for forging is 1130° C., the holding time is 2 hours, and then rolling at 930° C. for 120 minutes to obtain a hot-rolled titanium alloy billet; the TB9 titanium alloy is made of The composition of the following mass content: Al 3.0%, V 8.5%, Cr 6.5%, Zr 3.5%, Mo 4.5%, Pd 0.1%, the total mass content of impurities including Fe, C, N, H, O is 1%, The balance is Ti;

[0055] Step 2. The hot-rolled titanium alloy billet obtained in step 1 is subjected to solution treatment at 970°C for 30 minutes, and then peeled and polished to obtain a titanium alloy wire with a diameter of 13.1 mm;

[0056] Step 3, coiling the titanium alloy wire obtained in step 2, then performing an aging treatment at 560° C. for 4 hours, and then performing a shot blasting treatment to obtain a titanium alloy spring wire;

[0057] Step 4. Put the titanium alloy ...

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Abstract

The invention discloses a preparation method of a large-diameter hydrogen embrittlement prevention titanium alloy spring. The method comprises the following steps of 1, selecting a TB9 titanium alloy, and sequentially forging and rolling to obtain a hot-rolled titanium alloy blank; 2, solid solution, scaling and polishing to obtain a titanium alloy wire; 3, aging and shot blasting strengthening after rolling forming to obtain a titanium alloy spring wire; 4, soaking and drying to obtain a titanium alloy spring wire with a coating layer; 5, winding to obtain a titanium alloy spring; 6, tempering and shaping; 7, sand blasting and cleaning; 8, micro-arc oxidation to form a coating; and 9, sand blasting treatment to obtain the hydrogen embrittlement prevention titanium alloy spring. The lubricating coating layer is formed on the surface of the titanium alloy spring wire through infiltration, cracks of the titanium alloy spring wire in the winding process are avoided, forming of a large-diameter product is guaranteed, meanwhile, the ceramic oxidation film coating is prepared in combination with micro-arc oxidation, external hydrogen is prevented from diffusing into a titanium alloy matrix, and the problem of hydrogen embrittlement of the titanium alloy spring in the service process is solved.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium alloy springs, and in particular relates to a preparation method of a large-diameter anti-hydrogen embrittlement titanium alloy spring. Background technique [0002] Titanium alloy springs have the characteristics of small size, light weight, excellent corrosion resistance and fatigue resistance. Because their service life is 5 to 10 times that of steel springs, they have been used in aerospace, automotive and chemical equipment. In addition, the application of titanium alloy springs in petrochemical industry, metallurgical industry, mining industry and food processing industry, shipbuilding and navigation industry will have broad development space. The quality of the titanium alloy spring determines the service life of the spring. In the spring production process, the impurity content in the material, the surface quality of the spring and the heat treatment process are important f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21F35/00B21C37/04C22C14/00C22F1/18C21D1/18C21D9/02C25D11/26C21D1/68
CPCB21F35/00B21C37/04C22C14/00C22F1/183C21D1/18C21D9/02C25D11/026C25D11/26C21D1/68
Inventor 陶路路呼丹高广睿屈静王宝云
Owner 西安赛福斯材料防护有限责任公司
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