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Aluminum alloy material used for substituting QT450 drive screw rod and extrusion forming method thereof

A technology of aluminum alloy materials and transmission screw rods, which is applied in the field of aluminum alloy materials and its preparation, can solve the problems of high inertia, easy corrosion, and impact on life of ductile iron, and achieve alloy grain size refinement, round shape, and strength Enhanced effect

Active Publication Date: 2016-09-21
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] ⑦ From the comparison of processing technology, aluminum materials can easily obtain parts with complex shapes or cross-sections, while processing such complex parts with ductile iron requires more processes and equipment and consumes higher power than aluminum materials
[0023] Small amount is easy to break, causing accidents
[0024] ②The heat treatment process of ductile iron is complex, requires high equipment and technology, and consumes a lot of energy and emissions
[0025] ③ Along the entire life cycle of parts application, due to defects such as large inertia, bulkiness, corrosion, and brittleness of ductile iron, its material consumption, energy consumption, and maintenance costs are higher than that of steel, and its recycling value is low
[0026] There is no relevant research on aluminum alloy transmission screw rods in China, because of the limitations of ordinary aluminum alloy base materials, its mechanical properties are low, especially high temperature heat resistance, and the temperature it withstands is less than 300°C, which seriously affects the service life and even increases safety. risk

Method used

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  • Aluminum alloy material used for substituting QT450 drive screw rod and extrusion forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] 1. An aluminum alloy drive screw material component weight percent to replace QT450 is: Mn: 0.6%, Cd: 0.08%, Cu: 6.5%, Si: 1.5%, vanadium V: 0.2%, W: 0.07%, [CoCl 4 ] 2- 0.05%, the balance is aluminum Al;

[0126] 2. Preparation method: melt→hot top casting→round ingot homogenization→extrusion→solid solution→correction→aging→machining;

[0127] (1) Melt temperature ≥ 730°C;

[0128] (2) The preheating temperature of the chute is ≥750°C;

[0129] (3) Hot top casting temperature ≥ 700°C;

[0130] (4) Casting speed 80-140 mm / min;

[0131] (5) Homogenization temperature ≥ 510 ℃, heat preservation ≥ 1 hour;

[0132] (6) Extrusion mold preheating temperature ≥ 500 ℃;

[0133] (7) Extrusion tube preheating temperature ≥ 420 ℃, aluminum rod heating temperature ≥ 500 ℃;

[0134] (8) Heat treatment state: T8 - cold working after solid solution and artificial aging;

[0135] (9) Lathe machining, smoothness ≤ 0.4μm;

[0136] 3. Microstructure index of the product: the met...

Embodiment 2

[0139] 1. An aluminum alloy transmission screw material that replaces QT450, the weight percentage is: Mn: 0.65%, Cd: 0.08%, Cu: 6.8%, Si: 1.4%, V: 0.1%, W: 0.08%, [ CoCl 4 ] 2- 0.05%, the balance is aluminum Al;

[0140] 2, preparation method: with embodiment 1;

[0141] 3. The microstructure index of the product: the metallographic structure is equiaxed grain, the average grain size is 100μm, and the number of combined phases (T+θH) in the grain is 4 / [μm] 2 ;

[0142]4. Mechanical properties of the product: tensile strength 480Mpa, yield strength 330Mpa, elongation after fracture 8%, Brinell hardness 120.

Embodiment 3

[0144] 1. An aluminum alloy drive screw material that replaces QT450, the weight percentage is: Mn: 0.65%, Cd: 0.08%, Cu: 5.8%, V: 0.15%, [CoCl 4 ] 2- : 0.09%, the balance is aluminum Al;

[0145] 2, preparation method: with embodiment 1;

[0146] 3. The microstructure index of the product: the metallographic structure is equiaxed grain, the average grain size is 100μm, and the number of combined phases (T+θH) in the grain is 5 / [μm] 2 ;

[0147] 4. The mechanical properties of the product: the tensile strength is 495Mpa, the yield strength is 360Mpa, the elongation after fracture is 8%, and the Brinell hardness is 130.

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Abstract

The invention discloses an aluminum alloy material used for substituting a QT450 drive screw rod. The aluminum alloy material is characterized by mainly comprising, by weight, 0-2% of Mn, 0.05%-0.5% of Cd, 4.2%-8.0% of Cu, 0.1%-0.2% of V, 1%*10<-4>-2.0% of total Lewis acid-base pairs, and the balance Al, wherein the content by weight of Cu is larger than or equal to 0.8*the content by weight of Mn+4.05%, and the alloy mean grain size is 0-120 microns.

Description

technical field [0001] The invention relates to an aluminum alloy material replacing a QT450 transmission screw rod and a preparation method thereof. Background technique [0002] Ductile iron (referred to as ductile iron) is widely used in the manufacture of parts with high strength and good wear resistance such as transmission boxes, pump casings, cylinders, pistons, hubs, transmission parts, and steering parts; the reason why ductile iron is widely used lies in It has subdivided standard grades, and each grade stipulates stricter and more precise chemical composition combinations, heat treatment specification parameters, mechanical properties and physical indicators, etc., thus corresponding to subdivided application categories. See Table 1. [0003] Table 1 The mechanical properties and structures corresponding to the grades of ductile iron determined by GB / T 1348 [0004] [0005] The mechanical performance index and classification of ductile iron can be used as th...

Claims

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Application Information

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IPC IPC(8): C22C21/12C22C1/02C22F1/057
CPCC22C1/026C22C21/12C22F1/057
Inventor 门三泉张中可车云
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES