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A kind of aluminum alloy material to replace qt500 flange filter and its high pressure casting method

An aluminum alloy material, high pressure casting technology, applied in casting molding equipment, casting mold, casting mold composition, etc., can solve the problems of low strength, unable to achieve the mechanical properties of ductile iron materials, cracking and other problems

Inactive Publication Date: 2018-05-11
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is also very important to improve product quality. The flange filters made of aluminum alloy materials on the market are all small specifications (diameter less than 150mm), and the material is mostly aluminum-silicon (Al-Si), and the aluminum-silicon system has good formability. However, the strength and hardness are low, and the mechanical properties of the ductile iron material (QT500) cannot be achieved. It cannot meet its requirements in engineering applications with large pipe diameters, large flow rates, and high pressures, and is prone to safety problems such as leakage and rupture. The aluminum alloy material can reach the QT500 index in terms of performance, and the yield rate is higher than that of ductile iron material in terms of molding

Method used

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  • A kind of aluminum alloy material to replace qt500 flange filter and its high pressure casting method
  • A kind of aluminum alloy material to replace qt500 flange filter and its high pressure casting method
  • A kind of aluminum alloy material to replace qt500 flange filter and its high pressure casting method

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preparation example Construction

[0055]A preparation method of an aluminum alloy material replacing a QT500 flange filter, comprising the following steps:

[0056] (1) Within the scope of the aforementioned Lewis acid-base pair and element ratio, select a group of material combinations, determine the weight ratio, and calculate the weight of each required material according to the total amount of alloy to be prepared;

[0057] (2) Add aluminum ingots or molten aluminum into the smelting furnace, heat and keep it above 700°C;

[0058] (3) Add manganese Mn, cadmium Cd, copper Cu, molybdenum Mo and stir, add the selected Lewis acid-base pair combination, and stir evenly;

[0059] (4) carrying out in-furnace refining to above-mentioned alloy melt then;

[0060] (5) After refining, remove slag, let it stand, and take samples to analyze the chemical composition of the alloy, and adjust the chemical composition to the specified deviation range according to the analysis results; adjust the temperature to above 650 °...

Embodiment 1

[0077] An aluminum alloy flange filter replacing QT500 and its high-pressure casting method

[0078] 1. Product parameters:

[0079]

[0080] 2. Production process: smelting → pouring → metal mold pressurization filling → filling and solidification → pressure relief, mold opening and pick-up → cleaning, sawing → heat treatment;

[0081] 3. Alloy formula weight percentage (%)

[0082]

[0083] 4. Melt pouring temperature ≥ 700°C;

[0084] 5. Metal mold preheating temperature ≥ 350°C;

[0085] 6. Filling time ≥ 6s, filling pressure ≥ 0.02Mpa;

[0086] 7. Holding time ≥ 120s, holding pressure ≥ 0.05Mpa;

[0087] 8. Heat treatment: T5 (solid solution plus incomplete artificial aging);

[0088] 9. Microstructure index of the product: the metallographic structure is equiaxed grain, the average grain size is 50-60 μm, and the grain (T+θH)

[0089] The number of combined phases is 1~2 / [μm] 2 ;

[0090] 10. Mechanical properties

[0091]

Embodiment 2

[0093] An aluminum alloy flange filter replacing QT500 and its sand casting method

[0094] 1. Product parameters:

[0095]

[0096] 2. Production process: filling sand molding → film negative pressure → mold taking → box closing → smelting → pouring → cooling → removal of load

[0097] Press to open the box to pick up the parts→cleaning, sawing→heat treatment;

[0098] 3. Alloy formula weight percentage (%)

[0099]

[0100] 4. Forming: machining allowance ≥ 0.5mm, drafting angle: ≥ 1°, casting fillet ≥ R2;

[0101] 5. The negative pressure vacuum degree of the coating is ≥22.66KPa;

[0102] 6. Pouring temperature: ≥690°C, filling time: ≤60s;

[0103] 7. Cooling time: ≥10min;

[0104] 8. Heat treatment: T6 (solution plus complete artificial aging);

[0105] 9. Microstructure index of the product: the metallographic structure is equiaxed grain, the average grain size is 50-60 μm, and the grain (T+θH)

[0106] The number of combined phases is 1~2 / [μm] 2 ;

[0107...

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Abstract

The invention discloses an aluminum alloy material for replacing a QT500 flange filter. The aluminum alloy material is characterized by comprising the following main components in percentage by weight: 0.01-0.02% of molybdenum Mo, 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%, and the balance of Al; the Louis acid and alkali pair total quantity is 1%*10-4-2.0%; and the average alloy grain size is less than 120 microns.

Description

technical field [0001] The invention relates to an aluminum alloy material replacing the QT500 flange filter and a preparation method thereof. Background technique [0002] Ductile iron (referred to as ductile iron) is one of the main materials used in the lifting industry. The reason for this lies in the low price, stable mechanical properties and physical indicators of ductile iron. [0003] The mechanical performance index and classification standard of ductile iron can be used as the benchmarking basis for innovative design and performance improvement of aluminum alloy materials; the current market pursues low carbon, intensification, high efficiency (high performance), and flexibility. It is a symbol of the industry's leap from traditional form to high-end form. [0004] In order to give full play to the superior characteristics of aluminum alloy series represented by "lightness", it must first make great progress in "strength", and at the same time, there must be no u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/12C22C1/02C22C1/06C22F1/057B22D17/00B22C9/22B22C9/03
CPCB22C9/03B22C9/22B22D17/00C22C1/02C22C1/06C22C21/12C22F1/057
Inventor 车云门三泉张中可
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES