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Preparation method of titanium alloy spring made of wire with specially-shaped section

A technology of titanium alloy spring and special-shaped section, which is applied in the direction of making spring from wire, wire processing and application, can solve the problem of low stiffness coefficient of titanium alloy spring, increase the cross-sectional area of ​​wire, stable performance, and difficult to control spring precision. Effect

Active Publication Date: 2014-12-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the shear modulus of titanium alloy is only half of that of steel. Under the condition of the same structural size, the stiffness coefficient of titanium alloy spring is smaller

Method used

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  • Preparation method of titanium alloy spring made of wire with specially-shaped section
  • Preparation method of titanium alloy spring made of wire with specially-shaped section
  • Preparation method of titanium alloy spring made of wire with specially-shaped section

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this embodiment, the titanium alloy ingot is forged into a forged bar with a diameter of 70 mm, and the forged bar is rolled into a square wire with a cross-section of 12.5 mm×12.5 mm by a special-shaped profile rolling equipment.

[0029] (1) Forging: At 1170°C, the temperature is kept for 3 hours, and the forging process is used to forge the titanium alloy ingot into a φ70mm bar;

[0030] (2) Hot rolling: keep the temperature at 900°C for 1 hour, and use the hot rolling process to roll the titanium alloy forged bar into a square wire with a cross-section of 12.5mm×12.5mm through rolling equipment.

[0031] (3) Solution treatment: The rolled bar was subjected to solution treatment at 830°C for 10 min, and the tensile properties of the solution wire were measured. The specific results are shown in Table 1.

[0032] Table 1 Tensile properties of wire after solution treatment

[0033]

[0034] It can be seen from Table 1 that the wire has good plasticity after solu...

Embodiment 2

[0040]In this embodiment, the titanium alloy ingot is forged into a forged rod with a diameter of 60 mm, and the forged rod is rolled into a hexagonal wire with a side length of 7.5 mm by special-shaped rolling equipment.

[0041] (1) Forging: At 1140°C, heat preservation for 4 hours, using forging process, forging titanium alloy ingots into φ60mm rods;

[0042] (2) Hot rolling: heat preservation at 880°C for 2 hours, using a hot rolling process, rolling the titanium alloy forged rod through rolling equipment into a hexagonal wire with a side length of 7.5mm;

[0043] (3) Solution treatment: heat preservation at 820° C. for 15 minutes, carry out solution treatment on the wire, and measure the tensile properties of the wire in solution state. The specific results are shown in Table 3.

[0044] Table 3 Tensile properties of wire after solution treatment

[0045]

[0046] It can be seen from Table 3 that the plasticity of the wire after solution treatment is good, especially ...

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Abstract

The invention relates to a preparation method of a titanium alloy spring made of a wire with a specially-shaped section and belongs to the technical field of springs. The spring is formed by winding of the titanium alloy wire with the specially-shaped section; the titanium alloy wire comprises the components in percentage by mass as follows: 2-4 of Al, 6-10 of V, 4-8 of Cr, 2-6 of Mo, 2-6 of Zr, 0.1-0.3 of Fe, 0.03-0.15 of Si and the balance of Ti. The section of the titanium alloy spring wire can be rectangular, square, orthohexagonal or oval. The titanium alloy wire wound into the spring is prepared with forging, pressing and hot rolling technologies, the wire is subjected to solution treatment before being wound into the spring, and a finished product of the spring is subjected to aging and strengthening treatment. A titanium alloy which is used for preparing the spring can play a weight reduction role, and meanwhile, the titanium alloy has the good corrosion resistance and the long fatigue life in an ocean environment. With the adoption of the wire with the specially-shaped section, the section area can be increased under the condition that specifications of wires are similar, so that the rigidity of the spring is improved, and the usage requirement of the titanium alloy spring under the high workload can be met.

Description

technical field [0001] The invention belongs to the technical field of springs, in particular to a preparation method of a wire titanium alloy spring with a special-shaped section. Background technique [0002] Due to its deformation recovery characteristics, springs have been widely used in many fields. Using the characteristic that the spring element will generate a restoring force after deformation, it can be used for shock absorption, clamping, energy storage and measurement. According to different uses, there are mainly compression springs, tension springs and torsion springs. The materials used are mainly metal materials, and among the springs made of metal materials, steel springs are the most widely used, including carbon steel, alloy steel and stainless steel, which have been widely used in aerospace, machinery manufacturing, automobiles, ships and other fields. [0003] At present, with the development and continuous progress of equipment manufacturing technology,...

Claims

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Application Information

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IPC IPC(8): B21F35/00C22C14/00
Inventor 王健景绿路金伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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