Unlock instant, AI-driven research and patent intelligence for your innovation.

Mognesium alloy

A magnesium alloy, weight percentage technology, applied in the field of magnesium alloy, can solve the problems of low tensile strength and elongation after fracture, difficult to meet the forging production technology, elongation after fracture, magnesium alloy is easy to break, etc.

Active Publication Date: 2008-06-25
NANJING YUNHAI SPECIAL METALS CO LTD
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the magnesium alloys produced by smelting in the magnesium alloy industry have relatively low mechanical performance indicators such as tensile strength, yield strength, and elongation after fracture, which often cannot meet the requirements of some post-production stages that have higher requirements for such indicators. Die-casting, heat treatment or high-speed cutting and machining forging process
Especially in the process of forging and stretching magnesium alloys, the lower tensile strength and elongation after fracture make magnesium alloys easy to break, resulting in difficulties in processing
Take a magnesium alloy disclosed in CN1670231 as an example (the composition and its weight percentage content are Al: 6.5-7.5%, Mn: 0.20-0.70%, Zn: 0.40-1.0%, Si: ≤ 0.10%, Fe: ≤ 0.004 %, Cu: ≤0.05%, Ni: ≤0.010%, and the remaining Wei Mg), its tensile strength in die-casting state is 280Mpa, yield strength is 136Mpa, and elongation after fracture is 9%; although it can meet the technical requirements of forging automobile wheels However, the tensile strength and elongation after fracture are still low, and it is difficult to meet the forging production technology that has higher requirements for such mechanical properties.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The AZ91D magnesium alloy production waste whose component percentages are all industrial standard values ​​is used as the returned charge, and the returned charge is controlled to account for 60% of the total feeding amount of the entire smelting process. Put 375Kg of magnesium ingots, 18.6Kg of aluminum ingots, and 7.9Kg of zinc ingots into the slag-cleaned crucible after pretreatment, add a piece of flux, add 606kg of recycled material when it is half-melted, and continue melting, adding covering agent during the process to prevent burning , the final temperature of the magnesium solution is controlled at 670°C, and the time is controlled at 3h. After melting, nitrogen gas is blown into the molten magnesium at a temperature of 670°C, and mechanically stirred. At the same time, manganese powder and refining agent are added for refining. The refining time is controlled at 25 minutes, and the temperature is controlled at 680°C at the end of refining. Sampling and analyz...

Embodiment 2

[0013] The AZ91D magnesium alloy production waste whose component percentages are all industrial standard values ​​is used as the returned charge, and the returned charge is controlled to account for 60% of the total feeding amount of the entire smelting process. Put 376Kg of magnesium ingots, 16.6Kg of aluminum ingots, and 8.5Kg of zinc ingots into the slag-cleaned crucible after pretreatment, add a piece of flux, and add 606kg of recycled material when it is half-melted, and continue to melt. During the process, add a covering agent to prevent burning , the final temperature of the magnesium solution is controlled at 680°C, and the time is controlled at 4h. After melting, nitrogen is blown into the molten magnesium at a temperature of 680°C, and mechanically stirred. At the same time, manganese powder and refining agent are added for refining. The refining time is controlled at 25 minutes, and the temperature is controlled at 700°C at the end of refining. Sampling and analyz...

Embodiment 3

[0015] The AZ91D magnesium alloy production waste whose component percentages are all industrial standard values ​​is used as the returned charge, and the returned charge is controlled to account for 60% of the total feeding amount of the entire smelting process. Put 376Kg of magnesium ingots, 14.2Kg of aluminum ingots, and 9.4Kg of zinc ingots into the slag-cleaned crucible after pretreatment, add a piece of flux, add 606kg of recycled material when it is half-melted, and continue melting, adding covering agent during the process to prevent burning , the final temperature of the magnesium liquid is controlled at 690°C, and the time is controlled at 6h. After melting, nitrogen gas is blown into the molten magnesium at a temperature of 690°C, and mechanically stirred. At the same time, manganese powder and refining agent are added for refining. The refining time is controlled at 25 minutes, and the temperature is controlled at 730°C at the end of refining. Sampling and analyzin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a new type magnesium alloy that contains Al 6.6-7.4%, Mn 0.20-0.28%, Zn 1.0-1.3%, Si less than 0.08%, Fe less than 0.004%, Cu less than 0.025%, Ni less than 0.002%, Be 0.0005-0.0015%, and the rest is Mg. The invention is mainly improving the zinc content to improve the tensile strength and broken specific elongation. The equal tensile strength could be 378MPa, and the yield strength could be 136MPa, and broken specific elongation is 12%. It adds beryllium element and improves the anti oxidation.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy production, in particular to a magnesium alloy with high tensile strength and good elongation. Background technique [0002] At present, the magnesium alloys produced by smelting in the magnesium alloy industry have relatively low mechanical performance indicators such as tensile strength, yield strength, and elongation after fracture, which often cannot meet the requirements of some post-production stages that have higher requirements for such indicators. Die-casting, heat treatment or high-speed cutting and machining forging processes. Especially in the process of forging and stretching magnesium alloys, the lower tensile strength and elongation after fracture make magnesium alloys easy to break, resulting in difficulties in processing. Take a magnesium alloy disclosed in CN1670231 as an example (the composition and its weight percentage content are Al: 6.5-7.5%, Mn: 0.20-0.70%, Zn: 0.4...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02
Inventor 陶卫建
Owner NANJING YUNHAI SPECIAL METALS CO LTD