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Lewis acid-base pair optimized aluminum alloy material for sub-nanometer phase and its manufacturing method

A technology for optimizing sub-nanometer and aluminum alloy materials, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., and can solve the problems that 211Z materials are difficult to overcome

Active Publication Date: 2018-09-07
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] However, from the perspective of material design, 211Z materials also have some insurmountable problems

Method used

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  • Lewis acid-base pair optimized aluminum alloy material for sub-nanometer phase and its manufacturing method
  • Lewis acid-base pair optimized aluminum alloy material for sub-nanometer phase and its manufacturing method
  • Lewis acid-base pair optimized aluminum alloy material for sub-nanometer phase and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0394] A kind of aluminum alloy light automobile steering gear replacing QT400 and its gravity casting method

[0395] 1. Product parameters:

[0396] Bore (mm)

Oil pressure (MPa)

Output torque (Nm)

Applicable front axle load (kg)

66~80

10.3~13

1000~2150

1200~3500

[0397] 2. Production process: smelting → degassing → pouring → cooling → mold opening and picking → cleaning, sawing → heat treatment

[0398] 3. Alloy formula weight percentage (%)

[0399]

[0400] 4. Melt pouring temperature≥700℃

[0401] 5. Mold preheating temperature≥250℃

[0402] 6. Tilting to pouring method, filling time ≤30s

[0403] 7. Cooling time: ≥120s

[0404] 8. Heat treatment: T6 (Solid solution plus complete artificial aging)

[0405] 9. Product microstructure index: the metallographic structure is equiaxed crystal, the average grain size is 110~120μm, the number of (T+θH) combined phases in the grain is 2 / [μm] 2

[0406] 10. Mechanical properties

[0407] Tensile strength Mpa

Embodiment 2

[0409] A kind of aluminum alloy automobile turbocharger shell replacing QT450 and its sand casting molding method

[0410] 1. Product parameters: the turbo A / R value is 4, and the boost value is 0.6Mpa.

[0411] 2. Production process: modeling → preheating → box closing → melting → refining → standing → pouring → solidification → mold opening → cleaning → solid solution → aging

[0412] 3. Alloy formula weight percentage (%)

[0413]

[0414]

[0415] 4. Modeling: Machining allowance>0.5mm, draft angle:>1°, casting fillet>R2.

[0416] 5. Sand mold preheating: temperature>100℃ (heat preservation>1 hour), and pouring after warming to room temperature.

[0417] 6. Pouring temperature: >690℃

[0418] 7. Filling time: <10s

[0419] 8. Setting time: <10min.

[0420] 9. Heat treatment state: T5-Solid solution plus incomplete artificial aging.

[0421] 10. Product microstructure index: the metallographic structure is equiaxed crystal, the average grain size is 80~120μm, the number of combined phases...

Embodiment 3

[0425] A kind of aluminum alloy large-diameter drive wheel replacing QT500 and its centrifugal casting molding method

[0426] 1. Product parameters: diameter 800mm, disc thickness 100mm, weight 80-110kg

[0427] 2. Production process: Melt→Pouring→Rotating cavity→Filling and solidifying→Stopping to open mold to take part→Solid solution→aging

[0428] 3. Alloy formula weight percentage (%)

[0429]

[0430] 4. Melt pouring temperature≥700℃

[0431] 5. Preheating temperature≥430℃

[0432] 6. Filling time≤30s

[0433] 7. Cavity speed ≥500r / min

[0434] 8. Setting time ≥5min

[0435] 9. Heat treatment state: T8-cold working after solid solution and artificial aging.

[0436] 10. Product microstructure index: The metallographic structure is equiaxed crystal, the average grain size is 85μm, and the number of (T+θH) combined phases in the grain is 5-7 / [μm] 2

[0437] 11. Product mechanical properties

[0438] Tensile strength Mpa

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Abstract

In the invention, a generalized Lewis acid and base pair is employed to generate molecular disintegration, disturbance, activation, reconfiguration and exclusion effects in a nanoscale zone of an aluminum alloy melt, so that generation of critical nucleus can be effectively promoted and an optimum molecular substance phase combination structure of the alloy can be formed before solidification. A main component design formula includes, by weight, not more than 2% of manganese, 0.05-0.5% of cadmium, 4.2-8.0% of copper, wherein Cu >= 0.8Mn + 4.05% or 0.5% <= Cu <= 3% and Cu >= 1.5Mn, total amount of the Lewis acid and base pair being (1*10<-4>)%-2.0% or 7.0-9.0%, and the balanced being aluminum. By means of the formula, crystalline state of the alloy is isometric crystal with average grain size being less than 120 [mu]m. The number of sub-nano-scale (T+[theta]H) combined phase is not less than 1 / [mu]m<2>. A concrete-like reinforced structure and a super-elastic-plastic tension structure are formed through combination between high-density (T+[theta]H) phase and a ([theta]', [theta]'', GPI zone) in the alloy substrate, so that the aluminum alloy substrate is 500 MPa or more in strength class. The substrate can be used for producing a substitute-series nodular cast iron or steel products and structures thereof through various processing methods such as cast rolling, extrusion forging and the like.

Description

Technical field [0001] The invention relates to a high-strength aluminum alloy material that can replace serial grade nodular cast iron material products or steel products and a manufacturing method thereof, in particular to an aluminum alloy material with Lewis acid-base pair optimizing sub-nanometer phase and a manufacturing method thereof. Background technique [0002] The resources of aluminum in the earth's crust far exceed those of iron (8.2wt% aluminum and 5.1wt% iron), while the global annual steel production and sales volume exceeds 1.2 billion tons, and the aluminum metal production and sales volume is only 55 million tons. This huge contrast is sufficient It reflects that the human society's level of resource development and utilization of aluminum and aluminum materials is far behind the level of development and utilization of steel materials. [0003] Ductile iron (referred to as ductile iron) is one of the main basic materials in the iron and steel industry. It is wid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/12C22C21/14C22C21/16B22C9/02B22D18/04B22D17/00C22F1/057
CPCB22C9/02B22D17/00B22D18/04C22C21/12C22C21/14C22C21/16C22F1/057
Inventor 车云张中可门三泉李祥曹跃清
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES