强力航空发动机活塞的工作特点是承受着很大的机械负荷,活塞顶在高温下承受着高达8～10吨的气体压力,在润滑困难的情况下承受着巨大的侧压力和摩擦力。活塞的内腔较深,底部有加强筋及两个凸耳(见图1),这使锻造出模及金属流动充满模腔较困难。活塞用铝合金LD8锻制,其锻造特点如下 The working characteristics of the powerful aero-engine pistons are subjected to great mechanical loads. The piston top withstands gas pressures of up to 8 to 10 tons at high temperatures and is subjected to tremendous lateral pressure and friction under difficult lubrication conditions. The inner cavity of the piston is deep, with ribs and two lugs at the bottom (see Figure 1), which makes forging and metal flow more difficult to fill the cavity. Piston aluminum LD8 forging, the forging features are as follows