Fabrication of Al-Si-Mg Functional Composites Engine Cylinder and its Bench Test
The centrifugal casting method was adopted to fabricate Al-25Si-8Mg functional composites tubes reinforced with in-situ particles to acquire the Al-Si-Mg composites cylinder liner which was used to produce 600 cc aluminum alloy engine cylinder for the first time through the low pressure die casting. The inner layer of the cylinder was corroded and a bench test was carried out to test the performance of the engine assembled with the cylinder. It is found that a large number of primary Si/Mg2Si particles are segregated in the inner layer of Al-25Si-8Mg tubes in the centrifugal filed, forming the particle reinforcement layer. During die-casting process, the cylinder bore needs to be filled with refractory cotton to avoid the running-out of liquid aluminum alloy. Using the Al-Si-Mg composites cylinder, the measured maximum output power and output torque of the 600 cc water-cooled engine reach 22.66 KW and 44.37 N·m, respectively. Temperature monitoring shows a reduction of 5~8 degrees than usual.
Prof. Gu Xu
X. D. Lin et al., "Fabrication of Al-Si-Mg Functional Composites Engine Cylinder and its Bench Test", Key Engineering Materials, Vol. 759, pp. 15-19, 2018