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Aluminum alloy material for replacing QT450 vacuum single-chip hoop and sand model casting method thereof

An aluminum alloy material and sand casting technology, which is applied in the field of aluminum alloy material and its preparation, can solve the problems of unbearable high pressure, waste, unfavorable installation, etc.

Inactive Publication Date: 2016-09-28
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Existing aluminum alloy clamps are not strong enough and can only be used at the joints of low-pressure water pipes and cannot withstand high pressure
However, the weight of the traditional cast iron clamp is too large, which is not conducive to installation, and its corrosion resistance is poor. Frequent replacement also causes great waste, and there are certain safety hazards

Method used

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  • Aluminum alloy material for replacing QT450 vacuum single-chip hoop and sand model casting method thereof
  • Aluminum alloy material for replacing QT450 vacuum single-chip hoop and sand model casting method thereof
  • Aluminum alloy material for replacing QT450 vacuum single-chip hoop and sand model casting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] An aluminum alloy vacuum single-pin clamp replacing ductile iron QT450 and its sand casting method

[0073] 1. Product parameters:

[0074] diameter (mm)

Working pressure (MPa)

Weight (kg)

Load (kg)

30～120

1.1～1.8

6～20

300～500

[0075] 2. Production process: filling sand molding→coating negative pressure→mould taking→box closing→smelting→pouring→cooling→withdrawing negative pressure and unpacking→cleaning, sawing→heat treatment;

[0076] 3. Alloy formula weight percentage (%)

[0077]

[0078] 4. Forming: machining allowance ≥ 0.5mm, drafting angle: ≥ 1°, casting fillet ≥ R2;

[0079] 5. The negative pressure vacuum degree of the coating is ≥22.66KPa;

[0080] 6. Pouring temperature: ≥690°C, filling time: ≤60s;

[0081] 7. Cooling time: ≥10min;

[0082] 8. Heat treatment: T6 (solution plus complete artificial aging);

[0083] 9. The microstructure index of the product: the metallographic structure is equiaxed crystal, th...

Embodiment 2

[0087] An aluminum alloy vacuum single-pin clamp replacing ductile iron QT450 and its metal mold casting method

[0088] 1. Product parameters:

[0089] diameter (mm)

Working pressure (MPa)

Weight (kg)

Load (kg)

40～150

1.5～2.5

8～25

300～500

[0090] 2. Production process: smelting → degassing → pouring → cooling → mold opening → cleaning, sawing → heat treatment;

[0091] 3. Alloy formula weight percentage (%)

[0092]

[0093] 4. Melt pouring temperature ≥ 700°C;

[0094] 5. Mold preheating temperature ≥ 250°C;

[0095] 6. Tilting and turning pouring method, filling time ≤ 20s;

[0096] 7. Cooling time: ≥110s;

[0097] 8. Heat treatment: T6 (solution plus complete artificial aging);

[0098] 9. Product microstructure index: the metallographic structure is equiaxed crystal, the average grain size is 90-115μm, and the number of combined phases (T+θH) in the grain is 4 / [μm] 2 ;

[0099] 10. Mechanical properties

[0100]

Embodiment 3

[0102] An aluminum alloy vacuum single-pin clamp replacing ductile iron QT450 and its sand casting method

[0103] 1. Product parameters:

[0104] diameter (mm)

Working pressure (MPa)

Weight (kg)

Load (kg)

30～120

1.1～1.8

6～20

300～500

[0105] 2. Production process: filling sand molding→coating negative pressure→mould taking→box closing→smelting→pouring→cooling→withdrawing negative pressure and unpacking→cleaning, sawing→heat treatment;

[0106] 3. Alloy formula weight percentage (%)

[0107]

[0108] 4. Forming: machining allowance ≥ 0.5mm, drafting angle: ≥ 1°, casting fillet ≥ R2;

[0109] 5. The negative pressure vacuum degree of the coating is ≥22.66KPa;

[0110] 6. Pouring temperature: ≥690°C, filling time: ≤60s;

[0111] 7. Cooling time: ≥10min;

[0112] 8. Heat treatment: T6 (solution plus complete artificial aging);

[0113] 9. Product microstructure index: the metallographic structure is equiaxed crystal, the average g...

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PUM

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Abstract

The invention discloses an aluminum alloy material for replacing a QT450 vacuum single-chip hoop. The aluminum alloy material is characterized by comprising the following main components in percentage by weight: 0.03% of Co(CO)4-, manganese Mn not more than 2%, 0.05-0.5% of cadmium Cd, 4.2-8.0% of copper Cu and Cu not less than 0.8 Mn+4.05%, or Cu not less than 0.5% and not more than 3% and Cu not less than 1.5 Mn, and the balance of Al; the Louis acid and alkali pair total quantity is 1%*10-4-2.0% or 7.0-9.0%; and the average alloy grain size is less than 120 microns.

Description

technical field [0001] The invention relates to an aluminum alloy material replacing ductile iron QT450 vacuum single-pin clamp and a preparation method thereof. Background technique [0002] Ductile iron (referred to as ductile iron) is one of the main basic materials in the steel industry. It is widely and massively used to manufacture parts with complex stress, high strength, toughness, wear resistance, etc. , 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, ball connection, transmission part, Suspension parts, hook fasteners, deflectors, steering parts, etc.; in the automotive industry, the amount of steel materials accounts for 60-70% of the total amount of automotive materials, and more than two-thirds of them are ductile iron alloys. [0003] The mechanical performance index and classification standard of...

Claims

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Application Information

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IPC IPC(8): C22C21/14C22C21/12C22C1/02C22C1/06C22F1/057
CPCC22C1/026C22C1/06C22C21/12C22C21/14C22F1/002C22F1/057
Inventor 黄亮李祥胥光酉毛春荣曹跃清
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES