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Anti-fatigue titanium alloy and manufacturing method thereof

A manufacturing method and technology for titanium alloys, applied in the field of titanium alloy raw material processing, can solve the problems of low density, insurmountable fatigue resistance, and imprecise smelting, and achieve good thermal processing performance, good overall integrity, and improved purity. Effect

Inactive Publication Date: 2018-04-20
宁波俐辰新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to relevant research, the failure mode of existing titanium alloy parts is mainly fatigue failure. For example, 90% of aviation blades fail due to high cycle fatigue fracture; 85% of titanium alloy structural parts fail due to processing stress fatigue diffusion fracture; in addition, there are Some titanium alloys are fatigued due to low cycle and high stress (leading to slight plastic deformation). The fundamental reason is that in addition to the essential properties of titanium alloys, there are also widespread factors such as imprecise smelting, low purity, and low density.
Therefore, the essential fatigue resistance of titanium alloy is a pain point in the prior art and it is difficult to overcome
There are many methods to improve the fatigue performance of titanium alloys in the existing patented technology, but all of them are realized through composition changes or surface modification. Among them, improving the fatigue performance of titanium alloys through composition changes is equivalent to the development of new materials. As we all know, When a new material is born, it first needs to be tested for its stability, reliability, basic physical and chemical properties and smelting process suitable for industrial production. Difficult to be directly applied to industrial production; surface modification materials can improve surface wear resistance, corrosion resistance and fatigue resistance, but cannot improve the essential fatigue resistance of titanium alloys. ) function, still can not play the role of anti-fatigue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An anti-fatigue titanium alloy, with C series titanium alloy as the original body, after vacuum evaporation-solidification treatment, melting and sintering under the protection of argon, then rapid cooling and solidification, hot isostatic pressing treatment, and then rotary forging After mechanical processing, it is finally obtained by ceramic abrasive vibration treatment, ceramic abrasive abrasive flow processing and transmission part shot peening.

[0028] The manufacturing method of the above-mentioned anti-fatigue titanium alloy comprises the following steps:

[0029] 1) Preparation before production

[0030] ① Raw material preparation: Prepare 100Kg of C-series titanium alloy ingots by weight;

[0031] ②Preparation of modified materials: prepare a sufficient amount of high-purity argon gas and a sufficient amount of ceramic pellets for shot blasting;

[0032] ③ Tooling and equipment preparation: alumina ceramic crucible, vacuum bottom heating and melting furnace...

Embodiment 2

[0047] The whole is consistent with Example 1, the difference is:

[0048] A method for manufacturing an anti-fatigue titanium alloy, comprising the following steps:

[0049] 3) Modification

[0050] ③Vacuumize to 1×10 -2 Pa, then heat the alumina ceramic crucible to 1820°C by bottom heating, turn on electromagnetic stirring after reaching the temperature, stop the operation of the mechanical pump for vacuuming, maintain the operation of the Roots pump, and control the vacuum degree at 1×10 -1 Pa-5×10 -1 Pa;

[0051] ④ Turn on the circulating water cooling device 3 minutes after reaching the temperature, and the rising alloy steam is collected in the alumina ceramic collection dish, and accumulates in the form of solid particles. After the steam completely disappears, all equipment is turned off, and then the high-purity Argon, when the furnace temperature is cooled to room temperature, open the furnace and take out the alumina ceramic crucible, and then place the alumina ...

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PUM

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Abstract

The invention discloses an anti-fatigue titanium alloy and a manufacturing method thereof. The titanium alloy is finally prepared through the following steps of vacuum evaporation-solidification treatment, smelting and sintering under the argon shield, quick-cooling solidification, hot isostatic pressure treatment, rotary forging and post-machining, ceramic abrasive vibration treatment, ceramic abrasive flow processing and shot peening strengthening of a drive part with a C-series titanium alloy as an original plastid. The anti-fatigue titanium alloy provided by the invention is high in purityand good in compactness, has antifatigue flow lines, is antifatigue in nature and good in surface integrity and has a pressure stress layer.

Description

technical field [0001] The invention relates to the field of processing titanium alloy raw materials, in particular to an anti-fatigue titanium alloy and a manufacturing method thereof. Background technique [0002] Titanium alloy has significant advantages such as high specific strength, good medium temperature performance and high elongation, and is a metal material that is more and more widely used in modern industry. [0003] According to relevant research, the failure mode of existing titanium alloy parts is mainly fatigue failure. For example, 90% of aviation blades fail due to high cycle fatigue fracture; 85% of titanium alloy structural parts fail due to processing stress fatigue diffusion fracture; in addition, there are Some titanium alloys are fatigued due to low cycle and high stress (leading to slight plastic deformation). The root cause is not only the essential properties of titanium alloys, but also widespread factors such as imprecise smelting, low purity, a...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02C22B9/04C22F1/18B24C1/10
CPCB24C1/10C22B9/04C22C1/02C22C14/00C22F1/183
Inventor 孙惠丽黄佳钰
Owner 宁波俐辰新能源有限公司