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A kind of preparation method of high-strength beta titanium alloy wire for spring

A technology of titanium alloy wire and wire, which is applied in the field of preparation of high-strength β titanium alloy wire for springs, to achieve high strength, good size consistency, and reduce the effect of hydrogen absorption process

Active Publication Date: 2020-08-11
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be used for the upper and lower lock springs of aircraft landing gear and door balance springs. It also has corrosion resistance when used in the field of ships. It is an ideal spring residual material. At present, there is no process for preparing β-type titanium alloy wire for springs in China. report

Method used

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  • A kind of preparation method of high-strength beta titanium alloy wire for spring
  • A kind of preparation method of high-strength beta titanium alloy wire for spring
  • A kind of preparation method of high-strength beta titanium alloy wire for spring

Examples

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preparation example Construction

[0022] A method for preparing a β-type titanium alloy wire for springs, which uses free forging, precision forging, rolling, and hot drawing processes to prepare β-type titanium alloy wires for springs with a diameter of Ф1 mm to Ф3 mm. Specifically include the following steps:

[0023] Step 1: Using β-type titanium alloy ingot as raw material, free forging at 1100℃~1170℃ into rods of Ф120~Ф150mm, and then removing scale and forging cracks by centerless lathe;

[0024] Step 2: Precisely forge the bar prepared in step 1 into a bar of Ф40-Ф60 mm, use a centerless lathe to remove the scale on the surface, and use a grinder to grind the surface cracks;

[0025] Step 3: Roll the bar prepared in step 2 into a bar of Ф8-Ф9mm, use a centerless lathe to remove the scale on the surface, and use a grinder to grind the surface cracks;

[0026] Step 4: Continuously heat the surface-treated rod in step 3 in a tube furnace at 700°C to 720°C at a speed of 13 to 15m / min to form an oxide layer...

Embodiment 1

[0032] Taking the preparation of Φ3.0mmβ-type titanium alloy welding wire as an example, the preparation steps are as follows:

[0033] Step 1: A β-type titanium alloy ingot is used as a raw material, and the billet is forged at 1170°C, and the finished product is forged at 800°C to make a Ф130mm bar, and then the scale is removed by a centerless lathe to remove forging cracks.

[0034] Step 2: Precision forging the bar prepared in step 1 into a Ф50mm bar by precision forging, using a centerless lathe to remove the scale on the surface, and using a grinder to grind surface cracks.

[0035] Step 3: The bar prepared in step 2 is rolled into a Ф8.5mm bar by rolling, the scale on the surface is removed by using a centerless lathe, and the surface cracks are ground by a grinder.

[0036] Step 4: Continuously heat the surface-treated bar in step 3 in a tube furnace at 700°C and a speed of 13m / min to form an oxide layer, and when the bar comes out of the furnace, it is equipped with ...

Embodiment 2

[0047] Taking the preparation of Φ2.0mmβ-type titanium alloy welding wire as an example, the preparation steps are as follows:

[0048] Step 1: A β-type titanium alloy ingot is used as a raw material, through free forging at 1150°C, and the billet is made into a Ф130mm bar at 810°C, and then the scale is removed by a centerless lathe to remove forging cracks.

[0049] Step 2: Precision forging the bar prepared in step 1 into a Ф50mm bar by precision forging, using a centerless lathe to remove the scale on the surface, and using a grinder to grind surface cracks.

[0050] Step 3: The bar prepared in step 2 is rolled into a Ф8.5mm bar by rolling, the scale on the surface is removed by using a centerless lathe, and the surface cracks are ground by a grinder.

[0051] Step 4: Continuously heat the surface-treated bar in step 3 in a tube furnace at 710°C and a speed of 14m / min to form an oxide layer, and when the bar comes out of the furnace, it is equipped with a drawing machine w...

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Abstract

A preparation method of a high-strength beta titanium alloy wire material for springs comprises the following steps: freely forging a beta-type titanium alloy ingot into a bar with diameter being 120-150 mm, and then descaling and removing forging cracks by a centerless lathe; forging the bar into a bar with the diameter being 40-60 mm, rolling a bar with diameter being 8-9 mm, descaling the surface of the bar by the centerless lathe and coping surface cracks; continuously heating at 700-720 DEG C and at the speed of 13-15 m / min in a tubular furnace so as to form an oxide layer, lightly drawing the bar once by the use of a drawing die during discharge, and simultaneously coating the surface of the wire material with graphite cream; hot-drawing to prepare a wire blank with the diameter being 1.2-3.2 mm; and carrying out solid solution treatment and finally polishing to prepare the wire material with the diameter being 1.0-3 mm. The prepared beta titanium alloy wire material has the characteristic of high strength (being greater than or equal to 1300 MPa), is used for solving the problem that steel springs have low specific strength and are not corrosion resistant, and meets requirements of titanium alloy springs for aerospace use.

Description

technical field [0001] The invention belongs to the field of titanium alloy material processing, and relates to a preparation method of high-strength beta titanium alloy wire for springs. Background technique [0002] Spring products are widely used in aviation, aerospace, automobiles and other fields. Although aviation springs are mostly small parts in aircraft structures, devices, and systems, once they break and fail, they will often cause the loss of a certain device or a certain system function, resulting in serious damage. s consequence. Therefore, safety and reliability are the first requirements for aviation springs. Aviation springs were originally made of carbon steel, but under alternating stress, the springs are prone to corrosion fatigue and fracture. Subsequently, stainless steel springs gradually developed, and 18-8 austenitic stainless steel and semi-austenitic precipitation hardening stainless steel are the most common spring stainless steels. With the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/04B21C3/14C22F1/18
CPCB21C3/14B21C37/047C22F1/183
Inventor 薛祥义郭凯张利军周中波郑筠张天明
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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