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Processing technology for spring made of titanium alloy wire with special-shaped section

A technology of titanium alloy wire and special-shaped section, applied in the field of metal material processing, can solve the problems of reduced service life, poor corrosion resistance, easy to be corroded, etc., and achieve the effects of increased service life, high fatigue life, and not easy to corrode failure.

Active Publication Date: 2017-10-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the ocean and air transport industries are developing rapidly. The springs used in the manufacturing of ships and aircraft are mainly steel springs. The disadvantage of steel springs is that they have poor corrosion resistance and are easily corroded in marine environments, resulting in a significant reduction in service life.

Method used

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  • Processing technology for spring made of titanium alloy wire with special-shaped section
  • Processing technology for spring made of titanium alloy wire with special-shaped section
  • Processing technology for spring made of titanium alloy wire with special-shaped section

Examples

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Effect test

Embodiment 1

[0028] In this embodiment, titanium alloy wire with special-shaped cross-section is prepared by forging, precision forging, hot drawing, and cold swaging. The specific process is as follows:

[0029] (1) Heat a titanium alloy ingot with a diameter of φ220mm at 1160°C, heat it for 4.5 hours, and then forge the alloy ingot into a φ85mm billet (the forging deformation is 85%) through the forging blanking process;

[0030] (2) Turn the surface of the forged billet to φ80mm, heat it at 1020°C for 2 hours, and then precision forge the alloy billet into a φ30mm forged rod (the precision forging deformation is about 86%);

[0031] (3) Polish the surface of the forged rod to φ28mm, heat it at 840°C for 40 minutes, and then pass the hot drawing process. The deformation of the hot drawing pass is between 11% and 15%, and prepare a rod with a diameter of φ12mm. The tensile properties of the as-drawn rods at room temperature are shown in Table 1.

[0032] Table 1 Tensile properties of hot...

Embodiment 2

[0038] In this embodiment, titanium alloy wire with special-shaped cross-section is prepared by forging, precision forging, hot drawing, and cold swaging. The specific process is as follows:

[0039] (1) Make a titanium alloy ingot with a diameter of φ220mm at 1170°C, heat it for 3.5 hours, and then forge the alloy ingot into a φ95mm billet (the forging deformation is 81%) through the forging blanking process;

[0040] (2) Turn the surface of the forged billet to φ89mm, heat it at 1030°C for 2.5 hours, and then precision forge the alloy billet into a φ35mm forged rod (the precision forging deformation is about 85%);

[0041] (3) Polish the surface of the forged bar to φ33mm, heat it at 860°C for 50 minutes, and then use the hot drawing process. The deformation of the hot drawing pass is between 11% and 15%, and prepare a φ15mm bar. The room temperature tensile properties of the as-drawn rods are shown in Table 3.

[0042] Table 3 Tensile properties of hot-drawn rods at room t...

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Abstract

The invention relates to a processing technology for a spring made of a titanium alloy wire with a special-shaped section and belongs to the field of metal material processing. Titanium alloy components include the following elements in percentage by mass: 2-4 of Al, 8-11 of V, 4-8 of Cr, 4-8 of Mo, 3.5-6 of Zr and the balance of Ti. The spring is wound by using the titanium alloy wire with the special-shaped section, the titanium alloy wire with the special-shaped section, which is used for winding the spring, is prepared by using processes of ingot forging and cogging, finish forging, hot drawing and cold rotary forging, and the section of the wire can be shaped like a square, a rectangle, a regular hexagon and a regular octagon. Compared with a steel spring, the titanium alloy spring has favorable corrosion resistance and fatigue resistance and is stable in performance and obviously prolonged in life when being used in environments such as sea and other corrosive environments. In addition, the titanium alloy is relatively low in density which accounts for about 60% of that of steel, and therefore, a weight reducing effect can also be achieved if the steel spring is replaced with the titanium alloy spring.

Description

technical field [0001] The invention relates to a process for processing a titanium alloy wire spring with a special-shaped cross-section, belonging to the field of metal material processing. Background technique [0002] The spring is a kind of energy storage element that uses the elastic function to achieve repeated actions. When the displacement occurs under the load, the spring deforms elastically. After the load is removed, the spring returns to its original shape. With the help of this action characteristic, the spring can be installed in various In the equipment, functions such as buffering, reset, measurement, and control of mechanical movement are realized. Therefore, spring elements have been widely used in machinery manufacturing, electronics, hardware, automobiles and other industries. Depending on the application, the types of springs are complex and diverse, and can be processed into coil springs, scroll springs, leaf springs, etc. The metal materials commonl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21F3/02B21C37/04C22C14/00C22F1/18
CPCB21C37/04B21F3/02C22C14/00C22F1/183
Inventor 王健李红恩金伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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