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An aluminum alloy material and its liquid die forging casting method for replacing the full hydrostatic driving device of qt500 agricultural machinery

A technology of hydrostatic drive and aluminum alloy material, which is applied in the field of aluminum alloy material and its preparation, and can solve the problems of low price, rupture, oil leakage and other problems of agricultural machinery

Inactive Publication Date: 2018-05-25
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, the aluminum alloy materials of agricultural machinery hydraulic devices on the market are mostly aluminum-silicon and aluminum-copper systems. Aluminum-silicon (Al-Si) has good formability but low strength and hardness. It cannot meet the operating requirements of high-power hydraulic devices. , prone to oil leakage and rupture; the strength of aluminum-copper (Al-Cu) can reach very high, but it is very unstable and the casting formability is poor. The overall price of agricultural machinery is not high, and cost control is an inevitable factor for manufacturers to consider.

Method used

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  • An aluminum alloy material and its liquid die forging casting method for replacing the full hydrostatic driving device of qt500 agricultural machinery
  • An aluminum alloy material and its liquid die forging casting method for replacing the full hydrostatic driving device of qt500 agricultural machinery
  • An aluminum alloy material and its liquid die forging casting method for replacing the full hydrostatic driving device of qt500 agricultural machinery

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preparation example Construction

[0052] A method for preparing an aluminum alloy material to replace a fully hydrostatic driving device for QT500 agricultural machinery, comprising the following steps:

[0053] (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;

[0054](2) Add aluminum ingots or molten aluminum into the smelting furnace, heat and keep it above 700°C;

[0055] (3) Add manganese Mn, cadmium Cd, copper Cu, chromium Cr and stir, add the selected Lewis acid-base pair combination, and stir evenly;

[0056] (4) carrying out in-furnace refining to above-mentioned alloy melt then;

[0057] (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 re...

Embodiment 1

[0074] A fully hydrostatic driving device of aluminum alloy agricultural machinery replacing QT500 and its liquid die forging and casting method

[0075] 1. Product parameters:

[0076] Displacementml / r

Oil pressure MPa

Operating temperature

24～37

15～32

-30°～100°

[0077] 2. Production process: smelting → pouring → pressurization → holding pressure → cooling → mold opening and pick-up → cleaning, sawing → aging

[0078] 3. Alloy formula weight percentage (%)

[0079]

[0080] 4. Pouring temperature: ≥700°C;

[0081] 5. Start pressurization time ≥ 1s (residence time of molten metal in the mold before pressurization);

[0082] 6. Liquid forging specific pressure: ≥60MPa, holding time: ≥80s;

[0083] 7. Cooling time: After the pressure is released, the parts can be taken out, so the mold release temperature is high. In order to prevent cracks, the parts after the mold release should be buried with sand or soil immediately, and then taken o...

Embodiment 2

[0090] A kind of agricultural machinery aluminum alloy fully hydrostatic driving device and its liquid die forging casting method

[0091] 1. Product parameters:

[0092] Weightkg

Displacementml / r

Speed ​​r / min

Maximum oil pressure MPa

Operating temperature

12

30

1000～2500

32

-30℃～100℃

[0093] 2. Production process: smelting → pouring → pressurization → holding pressure → cooling → mold opening and picking → cleaning, sawing → aging;

[0094] 3. Alloy formula weight percentage (%)

[0095]

[0096] 4. Pouring temperature: 700~720℃;

[0097] 5. The time to start pressurization is 1-10s (the residence time of the molten metal in the mold before the pressure is applied);

[0098] 6. Liquid forging specific pressure: 60~100MPa, holding time: 80~200s;

[0099] 7. Cooling time: The parts can be picked up after the pressure is released, so the mold release temperature is high. In order to prevent cracks, the parts after the mold...

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Abstract

The invention discloses a QT500-substituting aluminum alloy material for a fully-hydrostatic driving device of an agricultural machine. The QT500-substituting aluminum alloy material is characterized by comprising the following main components in percentage by weight: 0.10-0.20% of Cr, less than or equal to 2% of Mn, 0.05-0.5% of Cd, 4.2-8.0% of Cu, 1%*10<-4>-2.0% of Lewis acid-alkaline pairs and the balance of Al, wherein Cu is larger than or equal to 0.8Mn+4.05%.

Description

technical field [0001] The invention relates to an aluminum alloy material which can replace the fully hydrostatic driving device of QT500 agricultural machinery 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/12C22C1/02C22C1/06C22F1/057
CPCC22C1/026C22C1/06C22C21/12C22F1/002C22F1/057
Inventor 张中可门三泉车云
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES