کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
794785 902550 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Aluminum alloy pistons reinforced with SiC fabricated by centrifugal casting
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Aluminum alloy pistons reinforced with SiC fabricated by centrifugal casting
چکیده انگلیسی

Hypereutectic Al–Si alloy-based composite pistons reinforced with SiC particles locally at the head were fabricated by centrifugal casting. The effects of various technique parameters, i.e., the slurry temperature of the alloy, the mold temperature and the rotation speed of the mold, on the particle segregation were investigated, and the macromorphologies and microstructures of pistons were observed. The mechanical properties, such as hardness and wear resistance along the axis of the piston and the thermal expansion coefficient at the piston head, were measured. The results showed that, (1) centrifugal casting can be used as a new and effective method in manufacturing pistons, and reasonable parameters were 850 °C, 600 °C and 800 rpm for the slurry temperature of the alloy, the mold temperature and the rotation speed of the mold, respectively; (2) the hardness values of pistons fabricated by centrifugal casting gradually increased from the piston skirt to the piston head, and the average hardness value in piston heads was improved by 23.7HRB over that of pistons fabricated by gravity permanent mold casting; (3) the piston heads showed excellent wear resistance, and the wear rate of piston heads decreased by 70.3% over that of the piston fabricated by gravity permanent mold casting; and (4) the average linear expansion coefficient of the piston head was 15.3 × 10−6 K−1 and decreased by 23.1% over that of pistons fabricated by gravity permanent mold casting.


► Centrifugal casting is a novel method for the fabrication of pistons, and it is found that it was the first time for us to manufacture pistons by centrifugal casting home and abroad.
► We successfully manufactured aluminum alloy-based composite pistons partially reinforced with SiC particles by centrifugal casting. And this type of piston contains a large quantity of SiC particles in the piston head, which can meet requirements such as hardness, wear resistance and the thermal expansion behavior of pistons.
► Compared with pistons fabricated by gravity permanent mold casting, pistons fabricated by centrifugal casting have better performance in hardness, wear resistance and thermal stability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 211, Issue 9, September 2011, Pages 1540–1546
نویسندگان
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