Flame-proof magnesium alloy added with beryllium and strontium and preparation method thereof

A technology of magnesium alloy and beryllium addition is applied in the field of non-ferrous metal preparation, which can solve the problems of complex equipment, coarse grains, and non-dense magnesium oxide film.

Inactive Publication Date: 2008-01-16
TAIYUAN UNIV OF TECH
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The smelting of magnesium alloys is completed in a resistance melting furnace. During the smelting process, oxidative combustion often occurs, which brings technological difficulties to the smelting of magnesium alloys and the casting of products, and the environmental pollution is serious and the product qualification rate is low.
[0004] In order to solve the problem of oxidative combustion of magnesium alloys in the smelting process, flux covering or gas protection methods are generally used, but there are problems of environmental pollution and complex equipment, such as the commonly used sulfur hexafluoride SF 6 Gas is an internationally banned polluting gas, and the flux coverage will cause pollution to the magnesium alloy liquid, which cannot meet the product requirements, and will also cause waste of materials and energy
[0005] Magnesium alloys are easy to oxidize and burn because the magnesium oxide film is loose and not dense, which cannot prevent the contact between air and magnesium. Therefore, adding alloy elements to magnesium alloys to form a dense protective film can also play a role in flame retardancy. Adding rare earths or calcium can also improve the flame retardancy. It is generally used in heat-resistant magnesium alloys, and the calcium element will reduce the mechanical properties of the alloy, while the rare earths can only improve the flame retardancy. Adding beryllium to the magnesium alloy It can also improve flame retardancy, but improper proportion or excessive beryllium will also cause grain coarsening and reduce mechanical properties. The current flame retardancy methods have disadvantages and deficiencies, and are not ideal

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flame-proof magnesium alloy added with beryllium and strontium and preparation method thereof
  • Flame-proof magnesium alloy added with beryllium and strontium and preparation method thereof
  • Flame-proof magnesium alloy added with beryllium and strontium and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0130] The present invention will be further described below in conjunction with accompanying drawing:

[0131] As shown in Figure 1, it is a flow chart of the preparation process, which must be strictly carried out according to the preparation process and operated according to the procedures.

[0132]The combination ratio of chemical materials required for preparation is determined according to the preset range of values, with grams and milliliters as the unit of measurement, and for industrial production, with kilograms and liters as the unit of measurement, and calculated in proportion.

[0133] The magnesium, aluminum, and zinc elements used in the preparation are smelted in bulk, and the manganese, beryllium, and strontium are added and smelted in the form of master alloys, namely: magnesium-manganese master alloy, aluminum-beryllium master alloy, and aluminum-strontium master alloy.

[0134] The beryllium element in the aluminum-beryllium master alloy can effectively pre...

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
Surface roughnessaaaaaaaaaa
Average grain sizeaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a flame-retardant Mg alloy doped with Gl and Sr and a preparation method thereof. The alloy is made from Mg, Al, Zn, and Mg-Mn intermediate alloy as raw materials, Al-Gl intermediate alloy and Al-Sr intermediate alloy as fire retardants and Al-Sr intermediate alloy as an agent for enhancing mechanical property of the alloy. The preparation method is carried out in a vertical smelting furnace, and comprises smelting at 710 plus or minus 5 DEG C, refining at 760 plus or minus 5 DEG C, standing, casting at 700 plus or minus 5 DEG C, adding smelting and refining agents, incubating at a constant temperature, standing to obtain a molten liquid of flame-retardant Mg alloy, casting in a die, cooling, cutting and shaping to obtain flame-retardant Mg alloy ingot. During the smelting process, the addition of Al-Gl intermediate alloy and Al-Sr intermediate alloy can efficiently prevent the combustion and oxidation of Mg alloy and simultaneously improve the mechanical property of Mg alloy. This method has the advantages of rigor process, reasonable formation, short process flow, less environmental pollution, and good compactness and uniformity of metallurgical structure of Mg alloy ingot product. The average crystal grain of the product is less than or equal to 90 micron, the tensile strength reaches 200 MPa, and the impact ductility reaches 15J / cm<2>.

Description

technical field [0001] The invention relates to a flame-retardant magnesium alloy added with beryllium and strontium and a preparation method thereof, belonging to the technical field of nonferrous metal preparation methods. Background technique [0002] Magnesium alloy is one of the lightest metal materials currently available in industry. It has high specific strength and specific stiffness, good electrical and thermal conductivity, magnetic shielding, damping and shock absorption, and machinability. It is used in automobiles, electronics and Widely used in aerospace field. [0003] The smelting of magnesium alloys is completed in a resistance melting furnace. During the smelting process, oxidative combustion often occurs, which brings technological difficulties to the smelting of magnesium alloys and the casting of products, and the environmental pollution is serious and the product qualification rate is low. [0004] In order to solve the problem of oxidative combustion...

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
IPC IPC(8): C22C23/02C22C1/03C22C1/06B22D21/04
Inventor 韩富银冯弘王红霞梁伟张金山
Owner TAIYUAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products