High strength corrosion resistant rare earth cast magnesium alloy and preparation method thereof

A technology for casting magnesium alloys and magnesium alloys, which is applied in the field of metal materials or metallurgy, can solve problems such as poor corrosion resistance, low mechanical properties of materials, and unsatisfactory die-casting processes, and achieve the effect of appropriate cost and good casting process performance

Inactive Publication Date: 2009-11-11
NO 52 INST OF CHINA NORTH IND GRP CORP
View PDF1 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low mechanical properties and poor corrosion resistance of the material seriously restrict the application of magnesium alloys, especially the functional parts with special environmental requirements, the main and secondary load-bearing parts
For high-performance magnesium alloy components, the die-casting process cannot meet the needs. Since the casting process performance of magnesium alloys is generally not as good as that of cast aluminum alloys, the heat capacity of cast magnesium alloys is about one-third lower than that of cast aluminum alloys, and thin-walled complex parts cannot use gravity. metal mold casting

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

specific Embodiment 1

[0030] Castings are manufactured by using the magnesium alloy material of the present invention through a sand casting process.

[0031] Alloy composition:

[0032] Nd 2.5(wt)%;

[0033] Gd 1.2(wt)%;

[0034] Zn 0.4(wt)%;

[0035] Zr 0.4(wt)%;

[0036] Ca 0.8(wt)%;

[0037] The total content of Fe, Cu and Ni impurity elements is not more than 0.005 (wt)%;

[0038] Mg balance.

[0039] The melting steps are:

[0040] (1) Alloys are configured according to requirements, and pure magnesium, Mg-25wt% Nd master alloy, Mg-25wt% Gd master alloy, Mg-10wt% Ca master alloy, Mg-30wt% Zr master alloy, and pure Zn are mixed at 150 to 250 ℃ preheating;

[0041] (2) Paint the crucible, heat and dry, add pure magnesium at 200°C, and heat and melt;

[0042] (3) Melt temperature is 700 DEG C, add Mg-25wt% Nd master alloy first, add Mg-25wt% Gd master alloy after melting and heat and melt and stir;

[0043] (4) Melt temperature is at 720 ℃, add Mg-10wt% Ca master alloy and industrial p...

specific Embodiment 2

[0048] Differential pressure casting molding of thin-walled complex parts using the magnesium alloy material of the invention.

[0049] Alloy composition:

[0050] Nd 2.8(wt)%;

[0051] Gd 1.4(wt)%;

[0052] Zn 0.6(wt)%;

[0053] Zr 0.6(wt)%;

[0054] Ca 0.2(wt)%;

[0055] The total content of Fe, Cu and Ni impurity elements is not more than 0.005 (wt)%;

[0056] Mg balance.

[0057] The melting steps are:

[0058] (1) Alloys are configured according to requirements, and pure magnesium, Mg-25wt% Nd master alloy, Mg-25wt% Gd master alloy, Mg-10wt% Ca master alloy, Mg-30wt% Zr master alloy, and pure Zn are mixed at 150 to 250 ℃ preheating;

[0059] (2) Paint the crucible, heat and dry, add pure magnesium at 200°C, and heat and melt;

[0060] (3) Melt temperature is 700 DEG C, add Mg-25wt% Nd master alloy first, add Mg-25wt% Gd master alloy after melting and heat and melt and stir;

[0061] (4) Melt temperature is at 720 ℃, add Mg-10wt% Ca master alloy and industrial pu...

specific Embodiment 3

[0066] Squeeze casting molding of cabin parts using the magnesium alloy material of the invention.

[0067] Alloy composition:

[0068] Nd 2.2(wt)%;

[0069] Gd 1.8(wt)%;

[0070] Zn 0.4(wt)%;

[0071] Zr 0.6(wt)%;

[0072] Ca 0.1(wt)%;

[0073] The total content of Fe, Cu and Ni impurity elements is not more than 0.005 (wt)%;

[0074] Mg balance.

[0075] The melting steps are:

[0076] (1) Alloys are configured according to requirements, and pure magnesium, Mg-25wt% Nd master alloy, Mg-25wt% Gd master alloy, Mg-10wt% Ca master alloy, Mg-30wt% Zr master alloy, and pure Zn are mixed at 150 to 250 ℃ preheating;

[0077] (2) Paint the crucible, heat and dry, add pure magnesium at 200°C, and heat and melt;

[0078] (3) Melt temperature is 700 DEG C, add Mg-25wt% Nd master alloy first, add Mg-25wt% Gd master alloy after melting and heat and melt and stir;

[0079] (4) Mg-10wt% Ca master alloy and industrial pure zinc are added at a melt temperature of 720°C;

[0080] (5...

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
elongationaaaaaaaaaa
lengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high strength corrosion resistant rare earth cast magnesium alloy and a preparation method thereof, which is characterized in that: the magnesium alloy comprises the following components according to the weight percentage: 1.8 to 4.0 percent of Nd, 1.0 to 2.0 percent of Gd, 0.2 to 0.8 percent of Zn, 0.4 to 1.0 percent of Zr, 0.0 to 0.8 of Ca, not more than 0.02 percent of total content of impurity elements of Fe, Cu and Ni, and the balance of Mg complemented to 100 percent; and the preparation method comprises the following steps of: melting pure magnesium, adding Mg-Nd intermediate alloy, Mg-Gd intermediate alloy, Mg-Ca intermediate alloy and commercial pure Zn in sequence, heating up to 760 DEG C to 785 DEG C after the mixture is totally melted, adding Mg-Zr intermediate alloy, stirring fully and evenly after the Mg-Zr intermediate alloy is melted, standing for 10 to 20 minutes, removing dross, and then casting ingots or casting the cast products at the temperature of 720 DEG C to 750 DEG C. The cast magnesium alloy has the advantages of controllable melting process, appropriate cost, excellent mechanical property, corrosivity, good casting process property and the like; and the cast magnesium alloy can be used to manufacture various non-die casting magnesium alloy parts by adopting the processes of sand mold casting, low-pressure casting, counter-pressure casting or squeezing casting, etc.

Description

technical field [0001] The invention relates to a cast magnesium alloy and a preparation method thereof, in particular to a high-strength corrosion-resistant rare earth cast magnesium alloy and a preparation method thereof, and belongs to the technical field of metal materials or metallurgy. Background technique [0002] Magnesium alloy is currently the lightest metal structural material, with high specific strength, specific stiffness and good cutting performance, and has broad application prospects in the fields of automobiles, aerospace and military equipment. Cast magnesium alloys account for a large proportion of magnesium alloy applications. However, the low mechanical properties and poor corrosion resistance of the material seriously restrict the application of magnesium alloys, especially the functional parts with special environmental requirements, and the main and secondary load-bearing parts. For high-performance magnesium alloy components, the die-casting proces...

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): C22C23/06C22C1/03C22F1/06
Inventor 徐永东朱秀荣赵国田周灵展宋运坤费良军张华
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap