Indirect extruding and casting method of wrought aluminum alloy casting

A deformed aluminum alloy, extrusion casting technology, applied in the field of indirect extrusion casting of deformed aluminum alloy castings, to achieve the effects of reduced machining, high mechanical properties, dimensional accuracy and high surface finish

Inactive Publication Date: 2010-06-30
NO 52 INST OF CHINA NORTH IND GRP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on deformed aluminum a...

Method used

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  • Indirect extruding and casting method of wrought aluminum alloy casting
  • Indirect extruding and casting method of wrought aluminum alloy casting

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Alloy formulation:

[0027] The mass percentage of pure aluminum, aluminum-silicon alloy, aluminum-copper alloy, aluminum-chromium alloy, and pure magnesium is: Si: 0.5%, Cu: 0.25%, Mg: 0.9%, Cr: 0.06%, Al: balance preparation;

[0028] Alloy smelting: first heat up pure aluminum and aluminum-silicon, aluminum-copper, and aluminum-chromium master alloys and melt them. When the temperature rises to 700°C, add 0.5% (mass percentage) of the total amount of the alloy to refine the HGJ-1 solid refining agent, and cool down to 680°C. Add magnesium at ℃, adjust the temperature to 720℃ and start indirect extrusion casting; the heating or cooling of molten aluminum is implemented by turning on and cutting off the power supply (the same below).

[0029] Indirect squeeze casting: The process parameters of indirect squeeze casting are: the pressurized pressure is 80MPa, the holding time is 15s, the pouring temperature is 690°C, and the mold temperature is 80°C; it is better to hea...

Embodiment 2

[0033] Alloy formulation:

[0034] Prepare pure aluminum, aluminum-silicon alloy, aluminum-copper alloy, aluminum-chromium alloy, and pure magnesium according to the mass percentage of alloy elements: Si: 0.8%, Cu: 0.5%, Mg: 1.0%, Cr: 0.1%, and Al: the balance ;

[0035] Alloy smelting: first heat up pure aluminum and aluminum-silicon, aluminum-copper, and aluminum-chromium master alloys to melt, when the temperature rises to 710°C, add HGJ-1 solid refining agent with 0.8% (mass percentage) of the total amount of the alloy for refining, and cool down to 690°C Add magnesium, adjust the temperature to 730°C and start indirect extrusion casting;

[0036] Indirect squeeze casting: The process parameters of indirect squeeze casting are: the pressurized pressure is 140MPa, the pressure holding time is 20s, the pouring temperature is 710°C, and the mold temperature is 120°C;

[0037] Heat treatment: solid solution treatment: solid solution temperature and time (515±5)℃×10h, the tra...

Embodiment 3

[0040] Alloy formulation:

[0041] Prepare pure aluminum, aluminum-silicon alloy, aluminum-copper alloy, aluminum-chromium alloy, and pure magnesium according to the mass percentage of alloy elements: Si: 1.15%, Cu: 0.8%, Mg: 1.2%, Cr: 0.3%, and Al: the balance ;

[0042] Alloy smelting: first heat up pure aluminum and aluminum-silicon, aluminum-copper, and aluminum-chromium master alloys to melt, raise the temperature to 720°C, add HGJ-1 solid refining agent with 0.6% (mass percentage) of the total amount of the alloy for refining, cool down to 700°C and add For magnesium, adjust the temperature to 740°C and start indirect extrusion casting;

[0043] Indirect squeeze casting: The process parameters of indirect squeeze casting are: the pressurized pressure is 180MPa, the pressure holding time is 25s, the pouring temperature is 730°C, and the mold temperature is 160°C;

[0044] Heat treatment: solution treatment: solution temperature and time (515±5)℃×8h, transfer time of cas...

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Abstract

The invention relates to an indirect extruding and casting method of a wrought aluminum alloy casting. The method comprises the following steps of: (a) preparing alloy, wherein the alloy comprises the following components in percentage by weight: 0.4-1.2 percent of Si, 0.2-0.9 percent of Cu, 0.8-1.4 percent of Mg, 0.02-0.4 percent of Cr and the balance of Al, the Si, the Cu and the Cr in the alloy are respectively added in the form of intermediate alloys of an aluminum-silicon alloy, an aluminum-copper alloy and an aluminum-chromium alloy, and the Mg and the Al are respectively added in the form of pure magnesium and pure aluminum; (b) alloy smelting: adding the pure aluminum and the intermediate alloys of the aluminum-silicon alloy, the aluminum-copper alloy and the aluminum-chromium alloy firstly, and after smelting, raising the temperature to 700-740 DEG C; adding a refining agent for refining, and then cooling to 680-700 DEG C; then adding the magnesium and adjusting the temperature to 720-740 DEG C to begin indirect extruding and casting; (c) carrying out the indirect extruding and casting, wherein the process has the following technological parameters: the pressure applied is 50-200MPa, the pressure maintaining time is 15-35s, the pouring temperature is 690-730 DEG C, and the temperature of a mould is 60-160 DEG C; (d) carrying out heat treatment, wherein the solid solution temperature is 515+/-5 DEG C, the solid solution time is 6-10h, the transferring time of the casting from discharging to water is 1-15s, and water cooling is carried at room temperature; carrying out primary aging immediately, wherein the aging temperature is (150-165)+/-5 DEG C, the aging time is 6-14h, and cooling is carried out in air; and carrying out secondary aging, wherein the temperature is (165-175)+/-5 DEG C, the aging time is 1-3h, and cooling is carried out in air.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to an indirect squeeze casting method for deformed aluminum alloy castings. Background technique [0002] At present, aluminum alloy parts on automobiles mostly use cast aluminum alloys for conventional processes such as pressure casting, low pressure casting and ordinary die forging. They have the disadvantages of high material and fuel consumption, large equipment investment, high labor intensity, and high production cost. In the foreign large-scale automobile manufacturing industry, indirect squeeze casting technology has been widely used in Japanese Nissan (Nissan) Motor Corporation and Mazda Motor Corporation, American Ford, General Motors Corporation, and its products involve automobile steering knuckles, lower levers, control arms, brakes, etc. Many products such as gears, brackets, automobile brake pump cylinders and automobile aluminum wheels show that the aluminum...

Claims

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Application Information

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IPC IPC(8): B22D17/00B22D1/00C22C21/00C22F1/04
Inventor 马欣宇范云波朱秀荣陈敏侯立群王健李素梅
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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