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An aluminum alloy material replacing qt500 large-diameter transmission wheel and its centrifugal casting forming method

A technology of aluminum alloy materials and transmission wheels, which is applied in the field of aluminum alloy materials and its preparation, can solve the problems of affecting life, high inertia of ductile iron, and easy corrosion, etc., and achieve strength improvement, round shape, and fine grain size of the alloy the effect of

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

[0013] ⑦ From the comparison of processing technology, aluminum materials can easily obtain parts with complex shapes or cross-sections, while processing such complex parts with ductile iron requires more processes and equipment and consumes higher power than aluminum materials
[0023] Small amount is easy to break, causing accidents
[0024] ②The heat treatment process of ductile iron is complex, requires high equipment and technology, and consumes a lot of energy and emissions
[0025] ③ Along the entire life cycle of parts application, due to defects such as large inertia, bulkiness, corrosion, and brittleness of ductile iron, its material consumption, energy consumption, and maintenance costs are higher than that of steel, and its recycling value is low
[0026] There is no relevant research on aluminum alloy large-diameter transmission wheels in China. Because of the limitations of ordinary aluminum alloy base materials, its mechanical properties are low, especially high temperature heat resistance. security risk

Method used

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  • An aluminum alloy material replacing qt500 large-diameter transmission wheel and its centrifugal casting forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] 1. A substitute for QT500 aluminum alloy large-diameter drive wheel material composition weight percentage: Mn: 0.6%, Cd: 0.08%, Cu: 6.3%, Si: 1.1%, Mg: 0.6%, Ti: 0.05% , [Cd(CN) 4 ] 2- : 0.01%, LiH: 0.05%, the balance is aluminum Al;

[0113] 2. Preparation method: melt→pouring→rotating cavity→filling and solidification→stopping to open mold to take part→solid solution→aging

[0114] (1) Melt pouring temperature ≥700℃;

[0115] (2) Preheating temperature ≥430℃;

[0116] (3) Filling time≤30s;

[0117] (4) Cavity speed ≥500r / min;

[0118] (5) Setting time ≥5 min;

[0119] (6) Heat treatment state: T8-cold working after solid solution and artificial aging;

[0120] 3. 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 / [μm] 2 ;

[0121] 4. Mechanical properties of castings: tensile strength 530Mpa, yield strength 410 Mpa, elongation after fracture 6%, Brinell hardness...

Embodiment 2

[0123] 1. An aluminum alloy large-diameter drive wheel that replaces QT500 in weight percentage: Mn: 0.7%, Cd: 0.09%, Cu: 6.5%, Si: 1.05%, Mg: 0.8%, Ti: 0.06% , [Cd(CN) 4 ] 2- : 0.02%, LiH: 0.05%, the balance is aluminum Al;

[0124] 2. Preparation method: same as Example 1;

[0125] 3. Product microstructure indicators: the metallographic structure is equiaxed crystal, the average grain size is 88μm, and the number of (T+θH) combined phases in the grain is 7 / [μm] 2 ;

[0126] 4. Mechanical properties of castings: tensile strength 533Mpa, yield strength 411Mpa, elongation after fracture 6%, Brinell hardness 140.

Embodiment 3

[0128] 1. An alternative to QT500 aluminum alloy large-diameter drive wheel material weight percentage: Mn: 0.7%, Cd: 0.09%, Cu: 7.2%, Mg: 1%, [Cd(CN) 4 ] 2- :0.045%, the balance is aluminum Al;

[0129] 2. Preparation method: same as Example 1;

[0130] 3. Product microstructure index: the metallographic structure is equiaxed crystal, the average grain size is 88μm, and the number of (T+θH) combined phases in the grain is 6 / [μm] 2 ;

[0131] 4. Mechanical properties of castings: tensile strength 530Mpa, yield strength 400Mpa, elongation after fracture 6%, Brinell hardness 138.

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Abstract

The invention discloses an aluminum alloy material replacing a QT500 large-diameter transmission wheel disc. The aluminum alloy material is characterized in that the aluminum alloy material is mainly prepared from, by weight percent, not larger than 2% of manganese (Mn), 0.05%-0.5% of cadmium (Cd), 4.2%-8.0% of cuprum (Cu), 0.5%-1% of magnesium (Mg), 1%*10<-4>-2.0% of Lewis acid and alkali pairs and the balance Al, wherein the percent of Cu is larger than or equal to 0.8Mn+4.05%, and the average alloy grain size is made to be smaller than 120 micrometers.

Description

Technical field [0001] The invention relates to an aluminum alloy material for replacing the QT500 large-diameter drive wheel and a preparation method thereof. Background technique [0002] Ductile iron (referred to as ductile iron) is widely used to manufacture parts with high strength and good wear resistance such as transmission boxes, pump casings, cylinder blocks, pistons, hubs, transmission parts, steering parts, etc. The reason why ductile iron is widely used is It has subdivided standard grades, and each grade stipulates stricter and precise chemical composition combinations, heat treatment specification parameters, mechanical properties and physical indicators, etc., corresponding to subdivided application categories. See Table 1. [0003] Table 1 Corresponding mechanical properties and structure of ductile iron grades determined by GB / T 1348 [0004] [0005] The mechanical performance indicators and classification of ductile iron can be used as a benchmark basis for inno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/14C22C21/16C22C21/12C22C1/02C22F1/057B22D13/04
CPCB22D13/04C22C1/026C22C21/12C22C21/14C22C21/16C22F1/002C22F1/057
Inventor 毛春荣陈凯李祥黄亮胥光酉
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES