Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Semi-solid flow variable rheolytic pressure casting forming method for flame-retardant magnesium alloy

A semi-solid rheological and magnesium alloy technology, which is applied in the field of flame-retardant magnesium alloy semi-solid rheological die-casting, metal forming, and Ce-containing flame-retardant magnesium alloy semi-solid forming process, can solve the problem of low performance of AZ91-Ca alloy, semi-solid Solid state process is difficult to control, the solidification time of alloy liquid is long, etc., to achieve the effect of good application prospect, good industrial application prospect, easy and rapid industrialization

Inactive Publication Date: 2018-07-24
SHANGHAI JIAO TONG UNIV
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prior art, publication number CN 104001895A "Flame Retardant Magnesium Alloy Semi-solid Rheological Squeeze Casting Forming Method", adopts squeeze casting method to carry out semi-solid rheological deformation of flame retardant magnesium alloy AZ91-Ca, although alloy crystal The grains have been refined, but the performance of AZ91-Ca alloy is low
At the same time, due to the slow speed of squeeze casting, the solidification time of the alloy liquid is longer, and the semi-solid process is difficult to control

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

[0030] The flame-retardant magnesium alloy includes the following components in percentage: 6.5wt.% Al, 2.5wt.% Zn, 0.5wt.% Y, 0.2wt.% Ca, 1.5wt.% Ce, The balance is Mg.

[0031] The preparation method of the flame-retardant magnesium alloy includes three process steps of smelting, semi-solid slurry preparation and subsequent die-casting.

[0032] First, the smelting process is in SF 6 and CO 2 It is carried out under the protection condition of mixed gas (volume ratio 1:100), and the specific steps are: mix the dried pure Mg, pure Al, pure Zn, pure Ca, Mg-Y master alloy and Mg-Ce master alloy After melting, the temperature is raised to 720°C for refining and slag removal, and the temperature of the melt is lowered to about 640°C.

[0033] The subsequent semi-solid slurry preparation process is: extracting the magnesium alloy liquid with a quantitative scoop, and then putting an inert gas injection device into the magnesium alloy liquid for blowing and stirring treatment, a...

Embodiment 2

[0038] The flame-retardant magnesium alloy includes the following components in percentage: 9.5wt.% Al, 0.5wt.% Zn, 2.5wt.% Y, 2wt.% Ca, 0.5wt.% Ce, and The amount is Mg.

[0039] The preparation method of the flame-retardant magnesium alloy includes three process steps of smelting, semi-solid slurry preparation and subsequent die-casting.

[0040] First, the smelting process is in SF 6 and CO 2 It is carried out under the protection condition of mixed gas (volume ratio 1:100), and the specific steps are: mix the dried pure Mg, pure Al, pure Zn, pure Ca, Mg-Y master alloy and Mg-Ce master alloy After melting, the temperature is raised to 720°C for refining and slag removal, and the temperature of the melt is lowered to about 640°C.

[0041] The subsequent semi-solid slurry preparation process is: extracting the magnesium alloy liquid with a quantitative scoop, and then putting an inert gas injection device into the magnesium alloy liquid for blowing and stirring treatment, ...

Embodiment 3

[0046] The flame-retardant magnesium alloy includes the following components in percentage: 8wt.% Al, 1.5wt.% Zn, 1.5wt.% Y, 1wt.% Ca, 1wt.% Ce, and the balance is Mg.

[0047] The preparation method of the flame-retardant magnesium alloy includes three process steps of smelting, semi-solid slurry preparation and subsequent die-casting.

[0048] First, the smelting process is in SF 6 and CO 2 It is carried out under the protection condition of mixed gas (volume ratio 1:100), and the specific steps are: mix the dried pure Mg, pure Al, pure Zn, pure Ca, Mg-Y master alloy and Mg-Ce master alloy After melting, the temperature is raised to 700°C for refining and slag removal, and the temperature of the melt is lowered to about 640°C.

[0049] The subsequent semi-solid slurry preparation process is: extracting the magnesium alloy liquid with a quantitative scoop, and then putting an inert gas injection device into the magnesium alloy liquid for blowing and stirring treatment, and...

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
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a semi-solid flow variable rheolytic pressure casting forming method for a flame-retardant magnesium alloy. The alloy comprises the following components of , by mass, 6.5- 9.5 wt% of Al, 0.5-2.5 wt% of Zn, 0.5-2.5 wt% of Y, 0.2-2 wt% of Ca, 0.5-1.5 wt% of Ce and the balance Mg. The method comprises the following steps of preparation of flame-retardant magnesium alloy semi-solid slurry and semi-solid rheological pressure casting. According to the semi-solid flow variable rheolytic pressure casting forming method, three elements of Y, Ca and Ce are simultaneously added into Mg-Al-Zn, oxidation and combustion of the magnesium alloy can be further prevented, so that the strength and the heat treatment strengthening effect of the magnesium alloy are improved; filling andsolidification are carried out under a low-pressure high-speed condition through a pressure casting process, the semi-solid slurry flows in a laminar flow mode during the filling process, so that theoverall structure of the casting is compact, the surface quality is high, and the room temperature mechanical property of the obtained flame-retardant magnesium alloy is excellent.

Description

technical field [0001] The invention relates to a metal forming method, in particular to a flame-retardant magnesium alloy semi-solid rheological die-casting forming method, which is especially suitable for the semi-solid forming process of Ce-containing flame-retardant magnesium alloy, and belongs to the technical field of semi-solid forming of metal materials. Background technique [0002] From the perspective of the processing object, semi-solid processing is a forming technology between solid state and liquid state. For alloys with wide solid-liquid quadrants, solid-liquid coexistence is a controllable melt state, so it is possible to process them. Generally, there are dendrites in the alloy. On the one hand, these dendrites are not easy to slide each other, which affects the deformation ability of the material. On the other hand, they are not conducive to dislocation movement and affect the mechanical properties of the alloy. Compared with traditional liquid and solid-...

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 Applications(China)
IPC IPC(8): C22C23/02B22D17/00C22C1/03
CPCC22C23/02B22D17/007C22C1/03
Inventor 刘文才茆继美吴国华张亮魏广玲丁文江
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com