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A kind of aluminum alloy material and its liquid die forging method for replacing qt500 automobile wheel hub

A technology of aluminum alloy material and automobile wheel hub, which is applied in the field of aluminum alloy material and its preparation, and can solve the problems of short service life of the wheel hub and the inability to use the aluminum alloy wheel hub.

Active Publication Date: 2019-03-12
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] Through consulting related literature, there have been researches on the production of automobile hubs by liquid die forging in China, and there are some shortcomings. The tensile strength is greater than 400Mpa, and the highest tensile strength is 450Mpa. Aluminum alloy wheels are used in the range

Method used

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Examples

Experimental program
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preparation example Construction

[0057] A preparation method of an aluminum alloy material replacing a QT500 automobile hub, comprising the following steps:

[0058] (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;

[0059] (2) Add aluminum ingots or molten aluminum into the smelting furnace, heat and keep it above 700°C;

[0060] (3) Add manganese Mn, cadmium Cd, copper Cu and cobalt tetracarbonyl anion Co(CO) 4 － , stir, add the selected Lewis acid-base pair, or add the selected Lewis acid-base pair combination, and stir evenly;

[0061] (4) carrying out in-furnace refining to above-mentioned alloy melt then;

[0062] (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 a...

Embodiment 1

[0078] 1. An aluminum alloy automobile wheel hub material that replaces QT500 in weight percent: Cu: 5.6%, Mn: 1.4%, Cd: 0.15%, Sr: 0.015%, Ba: 0.02%, B: 0.02%, [Ni (en) 3 ] 2+ :0.01%, TiOCl 2 :0.01%, Co(CO) 4 － :0.01%;

[0079] 2. Production process: smelting → refining → standing → filling → die forging → mold opening → cleaning → solid solution → aging;

[0080] 3. Pouring temperature: >680°C;

[0081] 4. Mold preheating temperature: >200°C;

[0082] 5. Filling time: <30s;

[0083] 6. Die forging: pressure > 130MPa, pressurization speed > 3mm / s;

[0084] 7. Holding pressure and solidification: holding pressure > 100Mpa, holding time > 60s, solidification time < 8min;

[0085] 8. Heat treatment state: T6- solid solution plus complete artificial aging;

[0086] 9. Product microstructure index: the metallographic structure is equiaxed crystal, the average grain size is 65-100 μm, and the number of combined phases (T+θH) in the grain is 7-9 / [μm] 2 ;

[0087] 10. Mec...

Embodiment 2

[0089] 1. An aluminum alloy automobile wheel hub material that replaces QT500, the composition weight percent is: Cu: 6.8%, Mn: 1.8%, Cd: 0.18%, Sr: 0.02%, Ba: 0.03%, B: 0.01%, [Ni (en) 3 ] 2+ :0.02%, TiOCl 2 :0.01%, Co(CO) 4 － :0.02%;

[0090] 2, the specific manufacturing method is identical with embodiment 1;

[0091] 3. The microstructure index of the product: the metallographic structure is equiaxed grain, the average grain size is 60-90 μm, and the number of combined phases (T+θH) in the grain is 8-10 / [μm] 2 ;

[0092] 4 Mechanical properties of the product: tensile strength Mpa550Mpa, yield strength Mpa>490Mpa, elongation after fracture>10%, Brinell hardness>165.

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Abstract

The invention discloses an aluminum alloy material replacing a QT500 automobile hub. The aluminum alloy material is characterized in that the aluminum alloy material is mainly prepared from, by weight percent, 0.005%-0.02% of cobalt tetracarbonyl anions Co(CO)4-, not larger than 2% of manganese (Mn), 0.05%-0.5% of cadmium (Cd), 4.2%-8.0% of cuprum (Cu), 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 smaller than 120 micrometers.

Description

technical field [0001] The invention relates to an aluminum alloy material for replacing the QT500 automobile hub and a preparation method thereof. Background technique [0002] It has become the direction of industrial development for aluminum alloy wheels to replace ductile iron or steel wheels in the field of automobiles or engineering vehicles, and aluminum alloy wheels for automobiles have been popularized. However, engineering aluminum alloy wheel hubs are still in their infancy, and foreign countries have already formed a large scale in this field. The reason is that they have not yet found basic materials and supporting manufacturing technologies that can meet the requirements. [0003] At present, the aluminum alloy wheels of engineering vehicles rely on imports, and the imported production lines use forging technology. This technology has the disadvantages of high manufacturing cost, low material utilization rate, and low production efficiency, which limits the pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/12C22C1/02C22C1/06C22F1/057B22D27/09
CPCB22D27/09C22C1/026C22C1/06C22C21/12C22F1/002C22F1/057
Inventor 门三泉张中可车云
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES