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Titanium alloy for spring parts and preparation method of alloy

A technology for titanium alloys and spring parts is applied in the field of titanium alloys for spring parts and their preparation, which can solve the problem of low tensile strength of titanium alloys, and achieve the effects of excellent mechanical properties, simple and easy method, and stable performance.

Active Publication Date: 2013-02-20
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the tensile strength of titanium alloys for commercial spring parts at home and abroad is not higher than 1500MPa

Method used

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  • Titanium alloy for spring parts and preparation method of alloy
  • Titanium alloy for spring parts and preparation method of alloy

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Experimental program
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Effect test

Embodiment 1

[0028] The titanium alloy for the spring part of this embodiment is composed of the following components by mass percentage: 2.9% aluminum, 3.1% molybdenum, 3.5% vanadium, 2.5% chromium, 2.5% iron, and the balance is titanium and unavoidable impurities.

[0029] The preparation method of the titanium alloy for the spring member of the present embodiment may further comprise the steps:

[0030] Step 1. Weigh the A1-85V master alloy, A1-60Mo master alloy, pure aluminum, pure chromium, pure iron and sponge titanium respectively, mix them and press them into a consumable electrode, and then place the consumable electrode in a vacuum Carry out three vacuum consumable arc melting in a consumable arc melting furnace to obtain a titanium alloy ingot with a diameter of 360 mm;

[0031] Step 2. Using a hydraulic press with a rated pressure of 3150 tons, the titanium alloy ingot described in step 1 is subjected to 3 times of blank forging at an initial forging temperature of 1150 ° C. Th...

Embodiment 2

[0035] The titanium alloy for the spring part of this embodiment is composed of the following components by mass percentage: 3.9% aluminum, 2.6% molybdenum, 2.5% vanadium, 3.5% chromium, 2.8% iron, and the balance is titanium and unavoidable impurities.

[0036] The preparation method of the titanium alloy for the spring member of the present embodiment may further comprise the steps:

[0037]Step 1. Weigh the A1-85V master alloy, A1-60Mo master alloy, pure aluminum, pure chromium, pure iron and sponge titanium respectively, mix them and press them into a consumable electrode, and then place the consumable electrode in a vacuum Carry out three vacuum consumable arc melting in a consumable arc melting furnace to obtain a titanium alloy ingot with a diameter of 280mm;

[0038] Step 2. Using a hydraulic press with a rated pressure of 2,000 tons, the titanium alloy ingot described in step 1 is subjected to three times of blank forging under the condition of an initial forging temp...

Embodiment 3

[0042] The titanium alloy for the spring part of this embodiment is composed of the following components by mass percentage: 3.8% aluminum, 3.5% molybdenum, 3.1% vanadium, 2.2% chromium, 3.2% iron, and the balance is titanium and unavoidable impurities.

[0043] The preparation method of the titanium alloy for the spring member of the present embodiment may further comprise the steps:

[0044] Step 1. Weigh the A1-85V master alloy, A1-60Mo master alloy, pure aluminum, pure chromium, pure iron and sponge titanium respectively, mix them and press them into a consumable electrode, and then place the consumable electrode in a vacuum Carry out three vacuum consumable arc melting in a consumable arc melting furnace to obtain a titanium alloy ingot with a diameter of 480mm;

[0045] Step 2. Using a hydraulic press with a rated pressure of 3150 tons, the titanium alloy ingot described in step 1 is subjected to 6 times of blank forging at an initial forging temperature of 1100 ° C. The...

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Abstract

The invention provides a titanium alloy for spring parts. The titanium alloy comprises the following components in mass ratio: 2.0-4.0% of aluminum, 2.0-4.0% of molybdenum, 2.0-4.0% of vanadium, 2.0-4.0% of chromium, 2.5-4.0% of ferrum and the balance being titanium and unavoidable impurities. The invention also provides a preparation method of the titanium alloy. The preparation method comprises the following steps of: (1) weighing raw materials according to mass ratio and pressing the raw materials into a consumable electrode, and carrying out vacuum consumable arc melting for three times to obtain an ingot, (2) carrying out cogging forging on the ingot and carrying out forming forging or forming processing to obtain a bar billet, and (3) carrying out solid solution and aging treatment on the bar billet to obtain the titanium alloy for spring parts. The titanium alloy for spring parts is simple, practicable, low in cost and suitable for large-scale industrial production, and has excellent mechanical properties; and the prepared spring parts have fatigue life greater than or equal to 5*105 times and are stable in performance, and the industrial production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy materials, and in particular relates to a titanium alloy for spring parts and a preparation method thereof. Background technique [0002] Titanium and titanium alloys are suitable for use as springs due to their high specific strength and corrosion resistance. The size of titanium springs is 20% smaller than that of steel springs, and the weight is reduced by more than 40%. The service temperature range of titanium alloy spring is -250 ℃ ~ 600 ℃, which is the spring with the largest range of high and low temperature resistance; its fatigue strength and yield ratio are relatively high, and its resistance to crack growth and fatigue resistance are better than those of stainless steel. Springs are better. [0003] As early as the 1970s, Mcdonnell Douglas Company of the United States began to use Ti-13V-11Cr-3A1 (Ti-13-11-3) alloy spring parts in civil aircraft. Compared with steel springs, t...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02C22F1/18
Inventor 曾立英葛鹏李倩周伟赵永庆毛小南戚运莲
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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