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A kind of aluminum alloy material replacing qt450 air cap and centrifugal casting method thereof

An aluminum alloy material and centrifugal casting technology, which is applied in the field of aluminum alloy material and its preparation, can solve the problems of increasing the use cost of ships and ships, low mechanical properties, poor tensile strength and corrosion resistance, etc.

Inactive 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

[0013] There are also relevant researches on aluminum alloy air caps in China. Because of the limitations of the basic materials, its mechanical properties are low, especially the tensile strength and corrosion resistance, which seriously affect the life of the air caps and increase the cost of ships and ships. , and even increase the security risk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] 1. The weight percentage of an aluminum alloy air cap material that replaces QT450 is: Magnesium Mg: 0.2%, Copper Cu: 6.3%, Manganese Mn: 0.6%, Cadmium Cd: 0.2%, Vanadium V: 0.3%, Zinc Sn: 0.05%, yttrium Y: 0.05%, silver dicyanide anion [Ag(CN) 2 ] － : 0.03%, vanadium pentacarbonyl V (CO) 5 : 0.05%, nitro manganese tetracarbonyl Mn(CO) 4 (NO): 0.05%, the rest is Al;

[0070] 2. Preparation method: melt → pouring → rotating the cavity → filling and solidifying → stop rotating and open the mold to take parts → solid solution → aging;

[0071] 3. Melt pouring temperature > 660°C;

[0072] 4. Mold preheating temperature > 350°C;

[0073] 5. Filling time <30s;

[0074] 6. Cavity speed > 500r / min, holding time > 2 min;

[0075] 7. Heat treatment: T6—solution plus complete artificial aging;

[0076] 8. The microstructure index of the casting: the metallographic structure is equiaxed grain, the average grain size is 80~100μm, and the number of combined phases (T+θH) in ...

Embodiment 2

[0080] 1. An aluminum alloy air cap material that replaces QT450, the composition weight percentage is: magnesium: 0.3%, copper Cu: 6.4%, manganese Mn: 0.7%, cadmium Cd: 0.15%, vanadium V: 0.25%, zinc Sn: 0.04 %, yttrium Y: 0.05%, silver dicyanide anion [Ag(CN) 2 ] － : 0.03%, vanadium pentacarbonyl V (CO) 5 : 0.05%, nitro manganese tetracarbonyl Mn(CO) 4 (NO): 0.05%, the rest is Al;

[0081] 2. The specific preparation method is the same as in Example 1;

[0082] 3. The microstructure index of the product: the metallographic structure is equiaxed grain, the average grain size is 80-120 μm, and the number of combined phases (T+θH) in the grain is 2-4 / [μm] 2 ;

[0083] 4. Mechanical properties of castings

[0084] Resistance strength Mpa

Embodiment 3

[0086] 1. An aluminum alloy air cap material that replaces QT450 has the following composition weight percentages: magnesium: 0.08%, copper Cu: 7.4%, manganese Mn: 0.7%, cadmium Cd: 0.15%, nitro-tetracarbonyl manganese Mn(CO ) 4 (NO): 0.04%, the rest is Al;

[0087] 2. The specific preparation method is the same as in Example 1;

[0088] 3. Product microstructure index: metallographic structure is equiaxed grain, average grain size is 80-120 μm, and the number of combined phases (T+θH) in the grain is 2-3 / [μm] 2 ;

[0089] 4. Mechanical properties of castings

[0090] Resistance strength Mpa

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PUM

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Abstract

The invention discloses an air cap aluminum alloy material replacing QT450. The air cap aluminum alloy material replacing QT450 is characterized by comprising the following main ingredients in percentages by weight: 0.05%-0.5% of magnesium, less than or equal to 2% of Mn, 0.05%-0.5% of Cd, 4.2%-8.0% of Cu, and the balance of Al, wherein Cu is greater than or equal to 0.8 Mn+ 4.05%; the total amount of Lewis acid and base pairs is 1%* 10 (-4)-2.0%; and the mean grain size of alloy is smaller than 120 micrometers.

Description

technical field [0001] The invention relates to an aluminum alloy material replacing a QT450 air cap and a preparation method thereof. Background technique [0002] The resource volume of aluminum in the earth’s crust far exceeds that of iron (8.2wt% for aluminum and 5.1wt% for iron). However, the global annual production and sales of steel is more than 1.2 billion tons, while the production and sales of aluminum metal are only 55 million tons. This huge contrast is full It reflects that the development and utilization of aluminum and aluminum materials in human society is far behind the development and utilization of iron and steel materials. [0003] Ductile iron (referred to as ductile iron) is one of the main basic materials in the iron and steel industry. , agriculture, automobile, casting, textile, machine tool, electric power, petrochemical, ship parts, etc. The main forms and types are hydraulic housing, pump body, pipeline, valve body, cylinder block, hub, shaft, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/16B22D13/00C22F1/057
CPCB22D13/00C22C21/16C22F1/057
Inventor 胥光酉毛春荣李祥陈凯余晟
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES