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Treatment method for prolonging fatigue life of titanium alloy by using pulsed magnetic field treatment

A pulsed magnetic field and fatigue life technology, applied in the direction of improving energy efficiency, process efficiency, additive manufacturing, etc., can solve the problems of inability to eliminate internal defects of materials, difficult to effectively control the reinforcement layer, and time-consuming, etc., to improve fatigue performance. , The effect of improving residual stress and short treatment time

Inactive Publication Date: 2021-11-19
成都昆吾科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although it can eliminate material defects and improve stress distribution to a certain extent, traditional heat treatment and hot isostatic pressing take a long time, and traditional heat treatment still has disadvantages such as high cost and environmental pollution.
Moreover, the surface treatment technology cannot eliminate the internal defects of the material and is not suitable for the modification of parts with complex shapes, and there is a problem that the strengthening layer is difficult to effectively control

Method used

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  • Treatment method for prolonging fatigue life of titanium alloy by using pulsed magnetic field treatment
  • Treatment method for prolonging fatigue life of titanium alloy by using pulsed magnetic field treatment
  • Treatment method for prolonging fatigue life of titanium alloy by using pulsed magnetic field treatment

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Effect test

Embodiment 1

[0030] like figure 1 Shown are the flow steps of the entire processing method. First, for the preparation of titanium alloy samples, select the appropriate TC4 titanium alloy powder according to GB / T3620.1-2016, the powder particle size is 45-105μm, and its main components are titanium, aluminum and vanadium. Selective laser melting method (SLM ) to obtain titanium alloy blanks, according to GB / T 228.1-2010, mechanically process titanium alloy blanks to obtain standard tensile samples. It should be noted that the purpose of the standard testing samples used here is to be accurate and standard. , Reliably evaluate the performance of additively manufactured titanium alloy parts before and after pulsed magnetic field treatment. It does not mean that the effect of pulsed magnetic field treatment is only achieved in the case of standard samples, and can be achieved for titanium alloy parts prepared by additive manufacturing. The expected effect of the process.

[0031] Prepare me...

Embodiment 2

[0040] like figure 1 Shown are the flow steps of the entire processing method. First of all, for the preparation of titanium alloy parts, select the appropriate TC4 titanium alloy powder according to GB / T3620.1-2016, the powder particle size is 45-105μm, and its main components are titanium, aluminum and vanadium, and the selective laser melting method (SLM) is used. The titanium alloy parts blanks are prepared, and the parts for testing are prepared according to a certain type of titanium alloy bone plate. The schematic diagram of the titanium alloy bone plate is as follows Figure 5shown. According to the use requirements in practical applications, and to achieve good treatment effect and reliable performance improvement, the titanium alloy bone plate blank is first subjected to plasma polishing treatment, and then pulsed magnetic field treatment. It should be noted that the bone plate product used here belongs to a relatively common application product in practical applic...

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Abstract

The invention discloses a treatment method for prolonging the fatigue life of a titanium alloy by using pulsed magnetic field treatment. The treatment method is characterized in that on the premise of ensuring the dimensional accuracy of a part, the interior residual stress is released by performing micro-scale adjustment on the matrix structure of the part under the instantaneous high-energy pulse action of the pulsed magnetic field, so that the microstructure and stress state of the part are improved, and the effect of improving the mechanical property of the part is achieved. According to the main process, 0-3 T of pulse magnetic field intensity is applied to a titanium alloy part prepared through an additive manufacturing method, the pulse frequency is controlled to be 10-100, and therefore the internal participation stress of the titanium alloy part is reduced, and the fatigue performance is improved. According to the method, the internal stress state and defects of the titanium alloy can be improved within a short time, the treatment process is fast, the stability is good, the deformation is avoided, and the dimensional accuracy of parts is guaranteed. The treatment method provided by the invention is simple in process, easy to operate, excellent in product performance, free of pollution and capable of meeting the requirement of green production.

Description

technical field [0001] The invention relates to the technical field of improving the performance of titanium alloys, in particular to a processing method for improving the fatigue life of titanium alloys by utilizing pulsed magnetic field processing. Background technique [0002] Titanium alloys have the advantages of high specific strength, excellent corrosion resistance and good biocompatibility, and are widely used in medical, aerospace and other fields. In recent years, the continuous development of additive manufacturing technology has shortened the production cycle of titanium alloy parts, and the demand for titanium alloy parts in these fields has gradually increased. However, the prepared parts often have defects such as a large number of pores and vacancies, and accumulate a large amount of stress, which is easy to cause severe deformation and cracking of the parts, and the thermal conductivity of titanium alloys is poor, forming a large temperature gradient in addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F3/00B22F10/60
CPCC22F3/00B22F10/60Y02P10/25
Inventor 周博皓吴明霞杨屹胡臻尚
Owner 成都昆吾科技有限公司
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