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氧化铝短纤维增强铝合金活塞 1.用途:解决一般铝硅合金活塞和高镍奥氏体镶圈活塞的高温强度低,耐磨性差,成本高,切削加工性能、疲劳强度以及抗铸铁咬合性差的缺陷,克服活塞早期磨损问题。 2.特点:对活塞进行:轴向,从活塞顶面至第一和第二道环槽的中间处;径向,从活塞外围向里,厚度为该处壁厚的2/3。进行氧化铝短纤维局部增强。耐磨性优异,抗咬合性和导热性好。线性膨胀系数小,高温强度和热疲劳强度都较高,国外已广泛应用。装备这种复合材料活塞的汽车大修期限可延长到30万公里,并且功率提高5%。 3.成本和经济效益:采用氧化铝短纤维局部增强铝合金活塞的成本只有高镍奥氏体镶圈的三分之一。我国现有汽车持有量达数百万辆,拖拉机数十万辆,各
Aluminum Short Fiber Reinforced Aluminum Piston 1. Uses: To solve the general low-temperature strength of aluminum-silicon alloy piston and high-nickel austenitic inserts piston, poor wear resistance, high cost, machinability, fatigue strength and poor resistance to cast iron The shortcomings of the piston to overcome the early wear and tear. 2. Features: The piston: axial, from the piston top to the first and second ring groove in the middle; radial, from the piston periphery inwards, the thickness of the wall thickness of 2/3. A local reinforcement of the alumina staple fibers was carried out. Excellent wear resistance, good seizure resistance and thermal conductivity. Linear expansion coefficient is small, high temperature strength and thermal fatigue strength are high, has been widely used abroad. Motor vehicle equipped with this composite piston overhaul period can be extended to 300,000 km, and power increased by 5%. 3. Cost and Economic Benefits: The cost of locally reinforced aluminum alloy pistons with alumina staple fibers is only one-third that of high-nickel austenitic inserts. China's existing car holdings of millions, tractors hundreds of thousands, each