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Aluminum alloy material replacing QT400 automobile control arm and semi-solid state die-casting forming method of aluminum alloy material

A technology of aluminum alloy materials and automobile control arms, which is applied in the field of aluminum alloy materials and its preparation, and can solve problems such as low production efficiency, high manufacturing cost, and low material utilization rate

Active Publication Date: 2016-09-14
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing aluminum alloy automobile control arm adopts the forging process, which has the disadvantages of high manufacturing cost, low material utilization rate, and low production efficiency.
At the same time, the tensile strength is only 400Mpa, and the elongation is 12%.
Under the long-term dynamic load of the control arm, it affects the life and safety performance of the whole vehicle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0052] A preparation method of an aluminum alloy material replacing a QT400 automobile control arm, 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 and platinum Pt, stir, add selected Lewis acid-base pair, or add 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 resu...

Embodiment 1

[0073] 1. An aluminum alloy automobile control arm material that replaces QT400, the composition weight percentage is: Cu: 5.3%, Mn: 1.0%, Cd: 0.15%, C: 0.08%, N: 0.04%, Mg: 0.03%, Co (CO) 4 － : 0.015%, Na 2 TiO 3 : 0.009, Pt: 0.04%;

[0074] 2. Production process: smelting→refining→standstill→casting→pressurized forming→mold opening→cleaning→solid solution→aging

[0075] 3. Melt temperature: >670°C;

[0076] 4. Mold preheating temperature: >350°C;

[0077] 5. Extrusion pressure: >5Mpa;

[0078] 6. Holding pressure: <10Mpa;

[0079] 7. Holding time: >30s;

[0080] 8. Heat treatment state: T4- solid solution plus natural aging;

[0081] 9. The microstructure index of the product: the metallographic structure is equiaxed grain, the average grain size is 80-100 μm, and the number of combined phases (T+θH) in the grain is 5-7 / [μm] 2 ;

[0082] 10. The mechanical properties of the product: the resistance strength is 450Mpa, the yield strength is 370Mpa, the elongation ...

Embodiment 2

[0084] 1. An aluminum alloy automobile control arm material that replaces QT400, the composition weight percentage is: Cu: 6.1%, Mn: 0.7%, Cd: 0.12%, C: 0.06%, N: 0.04%, Mg: 0.02%, Co (CO) 4 － : 0.01%, Na 2 TiO 3 : 0.009, Pt: 0.01%;

[0085] 2, the specific manufacturing method is identical with embodiment 1;

[0086] 3. The microstructure index of the product: the metallographic structure is equiaxed crystal, the average grain size is 90-110 μm, and the number of combined phases (T+θH) in the grain is 4-6 / [μm] 2 ;

[0087] 4. The mechanical properties of the product: the resistance strength is 430Mpa, the yield strength is 350Mpa, the elongation after fracture is 21%, and the Brinell hardness is 136.

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Abstract

The invention discloses an aluminum alloy material replacing a QT400 automobile control arm. The aluminum alloy material is characterized in that the aluminum alloy material is mainly prepared from, by weight percent, 0.005%-0.05% of platinum (P), 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 a QT400 automobile control arm and a preparation method thereof. Background technique [0002] Ductile iron (referred to as ductile iron) is one of the main basic materials in the iron and steel industry. , 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 automobile industry, the amount of steel materials accounts for 60-70% of the total amount of automobile materials, and more than two-thirds of them are ductile iron alloys, but Due to its own characteristics, ductile iron products have become a threshold in the direction of automobile lightweight. [0003] In engineering applications, the size and state of alumin...

Claims

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Application Information

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IPC IPC(8): C22C21/12C22C1/02C22F1/057B22D17/00
CPCB22D17/007C22C1/026C22C21/12C22F1/057
Inventor 车云张中可门三泉
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES