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Method for manufacturing superplastic forming and diffuse bonding magnesium alloy product

A technology of superplastic forming and diffusion bonding, which is applied in the direction of manufacturing tools, welding equipment, hollow objects, etc., and can solve the problems of poor forming performance and restricting the development of magnesium alloy sheet forming.

Inactive Publication Date: 2007-01-31
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the close-packed hexagonal crystal structure of magnesium alloy, its formability at room temperature is poor, which restricts the development of magnesium alloy sheet forming.

Method used

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  • Method for manufacturing superplastic forming and diffuse bonding magnesium alloy product
  • Method for manufacturing superplastic forming and diffuse bonding magnesium alloy product
  • Method for manufacturing superplastic forming and diffuse bonding magnesium alloy product

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0005] Specific Embodiment 1: This embodiment is to manufacture superplastic forming and diffusion-bonded magnesium alloy products in this way: a. Prepare plates: chemically clean the connecting surfaces of two or more magnesium alloy plates, and remove the surface of the plates. Oxide film to expose the fresh surface to increase the contact area and achieve better joint quality; b. Preparation of gasification agent: The gasification agent undergoes a chemical reaction near the superplastic temperature of the magnesium alloy, and the product is accompanied by a large amount of The gas, in the closed space, produces a very high internal pressure, using this air pressure for superplastic molding, the gasification agent is a solid substance, and the gasification agent is placed between the two plates; c, heating, Pressurization process: put the sheet material with gasifying agent into the mold, the mold is composed of upper mold 4 and lower mold 5, the upper mold 4 and lower mold ...

specific Embodiment approach 2

[0006] Specific embodiment 2: The sheet material of this embodiment adopts Mg-Zn-Zr thin plates 1 and 2 with a thickness of 1.2 mm. a. Chemically clean the connecting surface of the two plates to remove the oxide film and pollutants on the surface of the plates, such as oil, rust, dirt, etc., to expose the fresh surface to increase the contact area and form a firm connection between the joints; b , Place 3g of gasifying agent 3 on three positions between the two plates, such as figure 1 Shown; c, sheet material 1 and sheet material 2 that are clamped with gasification agent 3 are packed in upper die 4 and lower die 5, and the process of heating and pressing is carried out in the superplastic molding machine, as figure 2 As shown, the sheet is heated to the superplastic forming temperature of magnesium alloy at 350°C, and a pressure of 10 MPa is applied at the same time, so that the upper mold 4 and the lower mold 5 are in close contact with the sheet 1 and sheet 2 to form a c...

specific Embodiment approach 3

[0007] Specific embodiment three: The sheet material of this embodiment adopts Mg-Zn-Zr thin plates 1 and 2 with a thickness of 0.8 mm. a. Chemically clean the connecting surface of the two plates to remove the oxide film and pollutants on the surface of the plates, such as oil, rust, dirt, etc., to expose the fresh surface to increase the contact area and form a firm connection between the joints; b , Place 3g of gasifying agent 3 on three positions between the two plates, such as figure 1 Shown; c, the sheet material 1 and 2 that are clamped with gasification agent 3 are packed in die upper die 4 and lower die 5, and the heating and pressing process is to carry out in superplastic molding machine, as figure 2 As shown, the sheet is then heated to the superplastic forming temperature of magnesium alloy at 300°C, and a pressure of 10 MPa is applied at the same time, so that the upper mold 4, the lower mold 5 and the sheet are in close contact to form a closed space, as shown ...

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Abstract

The way to produce Mg metal alloy concerns a kind of way to produce the Mg metal alloy of type and connection. It is achieve in this way: a. wash the connection surface of two or more Mg metal alloy plate chemically to throw away the oxide film on the surface; b. put the air dose between the plates; c. put the plates in the molding equipment, heat to the shape temperature and at the same time, add press to make the up and down plate connected closely, the press is 1--10MPa, keep the temperature for 30--90mins; d. increase the press to 15--50MPa, time is 1--24 hours, then cool it and take off the film. The way in the invention put the two advantages together, make the parts can type only once, it has the advantages of good type, accurate type, no rebound and remaining dint, high usage.

Description

Technical field: [0001] The invention relates to a method for manufacturing superplastic forming and diffusion bonding (SPF / DB) magnesium alloy products. Background technique: [0002] The SPF / DB composite process means that the temperature of the superplastic forming and diffusion connection of the material is in the same temperature range, so the forming and connection can be put together to form the SPF / DB process. It is at the superplastic forming temperature of the material, A method of obtaining integral joints in two or more layers of panels. SPF / DB technology can form integral parts with complex shapes, which has great advantages in reducing structural weight and reducing production costs. SPF / DB technology has been successfully applied to aluminum alloy and titanium alloy components. Magnesium and its alloys are currently the lightest structural materials available. They have irreplaceable properties of aluminum alloys and titanium alloys, such as high specific st...

Claims

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Application Information

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IPC IPC(8): B29C51/10B23K20/22B23K20/16B21D13/08B21D51/12B21D53/00B21J5/12B21C23/02
Inventor 于彦东张凯峰
Owner HARBIN UNIV OF SCI & TECH
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