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Preparation method of Titanium-Copper (Ti-Cu) type titanium alloy semi-solid blank

A titanium alloy, semi-solid technology, applied in the field of semi-solid billet preparation, can solve problems such as increasing costs, achieve the effects of saving costs, realizing strain induction, and shortening the process flow

Active Publication Date: 2013-06-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the existing method has a semi-solid secondary heating process and increases the cost, and provides a method for preparing a Ti-Cu type titanium alloy semi-solid blank

Method used

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  • Preparation method of Titanium-Copper (Ti-Cu) type titanium alloy semi-solid blank
  • Preparation method of Titanium-Copper (Ti-Cu) type titanium alloy semi-solid blank
  • Preparation method of Titanium-Copper (Ti-Cu) type titanium alloy semi-solid blank

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specific Embodiment approach 1

[0030] Specific embodiment one: the preparation method of Ti-Cu type titanium alloy semi-solid blank of the present embodiment is as follows:

[0031] 1. Mix titanium metal and copper metal to obtain a mixture. The mass fraction of titanium metal in the mixture is 82%-86%, and the mass fraction of copper metal is 14%-18%. Then the mixture is smelted and poured to obtain a diameter of 50mm -60mm, length of 350mm-400mm cylinder bar, and then cutting, to obtain a length of 85mm-95mm Ti-Cu type titanium alloy billet;

[0032] 2. Install the upsetting mold tooling on the working table of the movable beam and the lower fixed beam of the hydraulic press respectively and preheat it to 220°C-235°C, and set the volume concentration at 125°C-145°C to 8%-25% graphite aqueous solution is evenly sprayed on the surface of the punch and die of the upset die;

[0033] 3. Install the semi-solid thixotropic forging die or semi-solid extrusion die on the workbench of the movable beam and the fix...

specific Embodiment approach 2

[0042] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the purity of the titanium metal described in step 1 is above 99.95%, and the purity of the copper metal is above 99.97%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0043] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1, the melting temperature is 1570°C-1600°C and the vacuum degree is 1.9×10 -1 Pa-7.9×10 -2 Under the condition of Pa, the mixture is smelted for 30min-35min. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a Titanium-Copper (Ti-Cu) type titanium alloy semi-solid blank, and relates to a preparation method of a semi-solid blank. The preparation method solves the technical problems that a semi-solid secondary heating process exists in an existing method, and accordingly cost is increased. The preparation method comprises the following steps: preparing a Ti-Cu type titanium alloy blank by using titanium metal and copper metal; heating the Ti-Cu type titanium alloy blank under the protection of argon by using an electric furnace, then conducting upsetting thermal-compression deformation to the blank, further keeping the blank warm under semi-solid temperature, and then conducting semi-solid thixo-forging or semi-solid thixo-extrusion to the blank to obtain the Ti-Cu type titanium alloy semi-solid blank. No semi-solid secondary heating process exists in the preparation method, and therefore production efficiency of Ti-Cu type titanium alloy parts is improved and cost is saved. The preparation method is applied to the filed of semi-solid blank preparation.

Description

technical field [0001] The invention relates to a method for preparing a semi-solid billet. Background technique [0002] Titanium alloy is an important structural metal developed in the 1950s. Titanium alloy is widely used in various fields because of its high strength, good corrosion resistance, and high heat resistance. The density of titanium alloy is generally about 4.51g / cubic centimeter, which is only 60% of steel. The strength of pure titanium is close to that of ordinary steel. Some high-strength titanium alloys exceed the strength of many alloy structural steels. Therefore, the specific strength (strength / density) of titanium alloy is much greater than that of other metal structural materials, and parts with high unit strength, good rigidity and light weight can be produced. Many countries in the world have recognized the importance of titanium alloy materials, researched and developed them one after another, and obtained practical applications. In the 1950s and ...

Claims

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Application Information

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IPC IPC(8): B22D17/00
Inventor 姜巨福王迎
Owner HARBIN INST OF TECH