Preparation method of Ti6Al4V alloy bar with high sound velocity uniformity

A technology for alloy rods and uniformity, applied in the field of titanium alloy processing, can solve problems such as large fluctuations in sound velocity, poor consistency of microstructure and mechanical properties, etc.

Active Publication Date: 2022-07-15
西部超导材料科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of preparation method of Ti6Al4V alloy bar with high sonic velocity uniformity, solve the different parts of Ti6Al4V alloy bar The problem of large fluctuations in sound velocity and poor consistency of microstructure and mechanical properties

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  • Preparation method of Ti6Al4V alloy bar with high sound velocity uniformity
  • Preparation method of Ti6Al4V alloy bar with high sound velocity uniformity
  • Preparation method of Ti6Al4V alloy bar with high sound velocity uniformity

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preparation example Construction

[0029] The invention provides a preparation method of a Ti6Al4V alloy bar with high sound velocity uniformity, see figure 1 , which includes the following steps:

[0030] Step 1, precision forging:

[0031] The original Ti6Al4V alloy round billet with uniform horizontal and vertical structure is placed in a stepping resistance furnace, heated at 40 ° C ~ 100 ° C below the phase transition point, and passed through 1 ~ 2 fires, and the number of fine forging passes per fire is 3 ~ 5 passes, the precision forging deformation of each pass is 5%~30%, and the precision forging reaches the target specification; among them, the total precision forging deformation is 41.0%~91.3%, and only one fire precision forging is required when the total deformation is less than 79.5%. , when the total deformation is greater than 79.5%, two-fire precision forging is required;

[0032] Step 2, high temperature solution heat treatment:

[0033] The billet obtained in step 1 is placed in a box-typ...

Embodiment 1

[0042] This embodiment provides a method for preparing a Ti6Al4V alloy rod with high sound velocity uniformity, which specifically includes the following steps:

[0043] Step 1, make the Ti6Al4V alloy billet with a uniform horizontal and vertical structure of Φ95mm (see the high-magnification structure diagram of the horizontal and vertical directions). figure 2 ) placed in a stepping resistance furnace, heated at 40°C below the phase transition point, passed through 2 fires, each fire forging pass is 5 passes, each pass is 15%~30% deformation, and precision forging to Φ28mm , the total deformation is 91.3%;

[0044] Step 2, place the Φ28mm billet obtained in step 1 in a box-type heat treatment furnace, and perform high-temperature solution heat treatment at 20°C below the phase transition point, holding time for 1h, and air-cooled after being released from the furnace;

[0045] Step 3, placing the Φ28mm billet after the high temperature solution heat treatment in step 2 in ...

Embodiment 2

[0050] This embodiment provides another method for preparing a Ti6Al4V alloy rod with high sound velocity uniformity, which specifically includes the following steps:

[0051] Step 1, make the Ti6Al4V alloy billet with a uniform horizontal and vertical structure of Φ95mm (see the high-magnification structure diagram of the horizontal and vertical directions). figure 2 ) placed in a stepping resistance furnace, heated at 70°C below the phase transition point, passed through 2 fires, each fire forging pass is 3 passes, each pass 10%~25% deformation, precision forging to Φ42mm , the total deformation is 80.5%;

[0052] Step 2, place the Φ42mm billet obtained in step 1 in a box-type heat treatment furnace, and perform high-temperature solution heat treatment at 40°C below the phase transition point, holding time for 1.5h, and air-cooled after being released from the furnace;

[0053] Step 3, place the Φ42mm billet after the high-temperature solution heat treatment in step 2 in a...

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Abstract

The invention belongs to the technical field of titanium alloy processing, and relates to a preparation method of a Ti6Al4V alloy bar with high sound velocity uniformity. The method comprises the following steps: firstly, selecting a Ti6Al4V alloy bar blank with uniform transverse and longitudinal tissues, heating below a phase transformation point, and precisely forging to a target specification; then, high-temperature solid solution heat treatment is conducted on the bar billet of the target specification; carrying out common annealing heat treatment on the bar blank subjected to the high-temperature solid solution heat treatment; then carrying out low-temperature aging heat treatment on the bar blank subjected to the common annealing treatment; and finally, surface defects and oxide skin of the bar blank subjected to low-temperature aging heat treatment are removed, and the Ti6Al4V alloy bar with the high sound velocity uniformity is obtained. According to the Ti6Al4V alloy bar prepared through the preparation method, the sound velocity uniformity of different parts of the same batch can be controlled to be +/-10 m/s, the microscopic structure and mechanical property consistency is good, and relevant standard requirements can be met.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, relates to the preparation of Ti6Al4V alloy, and in particular relates to a preparation method of a Ti6Al4V alloy bar with high sound velocity uniformity. Background technique [0002] Ti6Al4V alloy is a typical two-phase titanium alloy with excellent properties such as high strength, high specific strength and low elastic modulus. In addition to being an important structural material in the aerospace industry, it also has a wide range of applications in the biomedical field. Such as ultrasonic welders used for the production of welding medical protective masks, medical packaging bags, etc. In order to ensure the stable connection of the multi-layer structure of medical protective masks and realize fast and stable welding of medical packaging, the uniformity of ultrasonic sound velocity of the welder is the key. At the same time, in order to prevent instability and failure of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
CPCC22F1/183
Inventor 刘向宏韩飞孝孙小平郑念庆杨涛菅申申王凯旋杜予晅冯勇
Owner 西部超导材料科技股份有限公司
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