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A kind of aluminum alloy material and extrusion forming method thereof for replacing qt500 blade wheel

A technology of aluminum alloy materials and impeller wheels, which is applied in the field of aluminum alloy materials and its preparation, can solve problems such as affecting life, high inertia of ductile iron, and easy corrosion, and achieve strength improvement, round shape, and alloy grain size refinement Effect

Active Publication Date: 2018-06-29
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 impellers in China, because of the limitations of ordinary aluminum alloy base materials, its mechanical properties are low, especially high temperature heat resistance, and the temperature it withstands is less than 300°C, which seriously affects the service life and even increases safety risks.

Method used

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  • A kind of aluminum alloy material and extrusion forming method thereof for replacing qt500 blade wheel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] 1. An aluminum alloy impeller material component weight percent to replace QT500 is: Mn: 0.65%, Cd: 0.06%, Cu: 6.5%, Si: 1.5%, Mo: 0.06%, BeH 2 0.02%, W0.07%, [CoCl 4 ] 2- 0.05%, the balance is aluminum Al;

[0119] 2. Preparation method: melt→hot top casting→round bar homogenization→extrusion→solid solution→correction→aging

[0120] (1) Melt temperature ≥ 730°C;

[0121] (2) The preheating temperature of the chute is ≥750°C;

[0122] (3) Hot top casting temperature ≥ 700°C;

[0123] (4) Casting speed 80-140 mm / min;

[0124] (5) Homogenization temperature ≥ 510 ℃, heat preservation ≥ 1 hour;

[0125] (6) Extrusion mold preheating temperature ≥ 500 ℃;

[0126] (7) Extrusion tube preheating temperature ≥ 420 ℃, aluminum rod heating temperature ≥ 500 ℃;

[0127] (8) Heat treatment state: T8 - cold working after solid solution and artificial aging;

[0128] 3. Microstructure index of the product: the metallographic structure is equiaxed grain, the average grain siz...

Embodiment 2

[0131] 1. An aluminum alloy impeller material component weight percent to replace QT500 is: Mn: 0.8%, Cd: 0.08%, Cu: 6.8%, Si: 1.4%, Mo: 0.09%, BeH 2 : 0.01%, W0.08%, [CoCl 4 ] 2- : 0.05%, the balance is aluminum Al;

[0132] 2, preparation method: with embodiment 1;

[0133] 3. Product microstructure index: the metallographic structure is equiaxed crystal, the average grain size is 68μm, and the number of combined phases (T+θH) in the grain is 8 / [μm] 2 ;

[0134] 4. Mechanical properties of the product: tensile strength 525Mpa, yield strength 360Mpa, elongation after fracture 11%, Brinell hardness 140.

Embodiment 3

[0136]1. An aluminum alloy vane wheel material component weight percent to replace QT500 is: Mn: 0.8%, Cd: 0.08%, Cu: 6.8%, Mo: 0.09%, [CoCl 4 ] 2- : 0.05%, the balance is aluminum Al;

[0137] 2, preparation method: with embodiment 1;

[0138] 3. Product microstructure index: the metallographic structure is equiaxed crystal, the average grain size is 68μm, and the number of combined phases (T+θH) in the grain is 8 / [μm] 2 ;

[0139] 4. Mechanical properties of the product: tensile strength 525Mpa, yield strength 356Mpa, elongation after fracture 11%, Brinell hardness 139.

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Abstract

The invention discloses a substitutive QT500 aluminum alloy vane wheel material. The substitutive QT500 aluminum alloy vane wheel material is characterized in that the material comprises, by weight, no more than 2% of Mn, 0.05%-0.5% of Cd, 4.2%-8.0% of Cu, 0.05%-0.1% of Mo and the balance Al; the percentage of Cu is not smaller than 0.8*Mn+4.05%; and the total amount of Lewis acid-base pairs is 1%*10<-4> to 2%, so that 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 QT500 blade wheel and a preparation method thereof. Background technique [0002] Ductile iron (referred to as ductile iron) is widely used in the manufacture of parts with high strength and good wear resistance such as transmission boxes, pump casings, cylinders, pistons, hubs, transmission parts, and steering parts; the reason why ductile iron is widely used lies in It has subdivided standard grades, and each grade stipulates stricter and more precise chemical composition combinations, heat treatment specification parameters, mechanical properties and physical indicators, etc., thus corresponding to subdivided application categories. See Table 1. [0003] Table 1 The mechanical properties and structures corresponding to the grades of ductile iron determined by GB / T 1348 [0004] [0005] The mechanical performance index and classification of ductile iron can be used as the benchmark...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/14C22F1/057
CPCC22C21/14C22F1/057
Inventor 门三泉张中可车云
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES