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Rheological forming method of high efficiency and low cost manufacturing of semi-solid Al-Si aluminum alloy casting

An aluminum alloy casting, semi-solid technology, applied in the field of rheological deformation, can solve the problems of uncontrollability, low efficiency, high cost, etc., and achieve the effect of flexible and controllable speed

Inactive Publication Date: 2018-05-25
机械科学研究总院(将乐)半固态技术研究所有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of poor quality, low efficiency, complex operation process, uncontrollable and high cost of preparing semi-solid metal slurry in the manufacture of semi-solid Al-Si series aluminum alloy castings, the present invention provides a high-efficiency, low-cost, stable and controllable manufacturing method. Rheological forming method of semi-solid Al-Si series aluminum alloy castings

Method used

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  • Rheological forming method of high efficiency and low cost manufacturing of semi-solid Al-Si aluminum alloy casting
  • Rheological forming method of high efficiency and low cost manufacturing of semi-solid Al-Si aluminum alloy casting
  • Rheological forming method of high efficiency and low cost manufacturing of semi-solid Al-Si aluminum alloy casting

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example 1

[0035] This implementation example is a semi-solid low-pressure rheologically formed ZL101A alloy casting. The composition of the alloy material is (weight percent): Si: 6.96%, Mg: 0.35%, Ti: 0.15%, Fe: 0.1%, Ni: 0.01%, Zn : 0.01%, Cu: 0.01%, Mn: 0.01%, Sn: 0.01%, and the rest is Al. The liquidus and solidus temperatures of the ZL101A alloy are 615°C and 560°C, respectively.

[0036] The specific process is as follows:

[0037] 1) Melt the ZL101A alloy in the crucible resistance furnace 8. When the gold temperature reaches about 680°C, add a modifier, and then add argon for refining after the modification is completed (the amount added is 0.5% of the total weight of the alloy liquid). Use a bell jar to press into the bottom of the Al-Si series aluminum alloy liquid and keep swinging to make the ZL101A alloy liquid boil completely. When there are no more bubbles in the bell jar, clean the slag with a scum spoon, and finally lower the temperature of the alloy liquid to 635°C; ...

example 2

[0042] This implementation example is a semi-solid low-pressure rheologically formed ZL114A alloy casting. The composition of the alloy material is (weight percent): Si: 6.96%, Mg: 0.55%, Ti: 0.15%, Fe: 0.1%, Ni: 0.01%, Zn : 0.01%, Cu: 0.01%, Mn: 0.01%, Sn: 0.01%, and the rest is Al. The liquidus and solidus temperatures of the ZL101A alloy are 615°C and 560°C, respectively.

[0043] The specific process is as follows:

[0044] 1) Melt the ZL114A alloy in the crucible resistance furnace 8. When the gold temperature reaches about 680°C, add a modifier, and then add argon for refining after the modification is completed (the amount added is 0.5% of the total weight of the alloy liquid), and the argon gas Use the bell jar to press into the bottom of the alloy liquid and keep swinging to make the ZL114A alloy liquid boil completely. When there are no more bubbles in the bell jar, clean the slag with a scum spoon, and finally lower the temperature of the alloy liquid to 640°C;

...

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Abstract

The invention provides a rheological forming method of high efficiency and low cost manufacturing of a semi-solid Al-Si aluminum alloy casting, and belongs to the field of semi-solid metal rheologicalprocessing. The implementation method of the rheological forming method of high efficiency and low cost manufacturing of the semi-solid Al-Si aluminum alloy casting includes the steps that an Al-Si aluminum alloy melt with low superheat in a closed crucible enters a pressure chamber through a temperature-controlled pipeline, at that time, slurry with 1-5% solid fraction is formed. Because of heardeformation and free grain nucleation of a stirring rod, the semi-solid slurry with certain solid fraction is formed. A mold cavity is filled smoothly under the push of a punch, and finally, the semi-solid Al-Si aluminum alloy casting is obtained by rheological forming. The rheological forming method of high efficiency and low cost manufacturing of the semi-solid Al-Si aluminum alloy casting hasthe special advantages that (1) the semi-solid slurry is quickly prepared in the pressure chamber without the need of special equipment for direct transportation, and is directly pressed and formed; (2) the semi-solid slurry with different solid fraction can be prepared and be controlled digitally, the adaptability is high, the formed casting structure is compact and the process is stable; and(3)a slurrying device is simple in structure, convenient to operate, low in cost and high in efficiency.

Description

technical field [0001] The invention relates to a rheological deformation method for manufacturing semi-solid Al-Si series aluminum alloy castings with high efficiency and low cost Background technique [0002] On-line and quick preparation of semi-solid metal paste with spherical primary phase and different solid phase ratio is the core content of semi-solid metal forming technology. How to prepare semi-solid metal slurry on-line with high efficiency and low cost and directly flow into it has become the focus of research and attention on the industrialization of semi-solid metal processing technology. [0003] At present, domestic use of rheological deformation method to manufacture semi-solid Al-Si series aluminum alloy castings mainly stays in the experimental research stage, and has not yet formed industrialization capabilities. The main factor limiting the large-scale application of semi-solid rheological pulping technology in my country is the lack of stable and contr...

Claims

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Application Information

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IPC IPC(8): B22D17/00B22D1/00C22C21/02
CPCB22D1/007B22D17/007C22C21/02
Inventor 冯志军阮明郑金传
Owner 机械科学研究总院(将乐)半固态技术研究所有限公司
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