近年来美军为了增大穿甲弹的威力已使用贫铀穿甲弹,主要有空军的 GAU-8型30毫米航空炮弹、陆军的105毫米 XM774型反坦克穿甲弹与 M735E1型脱壳穿甲弹、海军的20毫米方阵舰炮用穿甲弹。贫铀合金是密度大、强度高、靭性好且有燃烧后效的优质穿甲弹芯材料,其威力比钨弹芯大得多,但成本较钨弹芯低。美国对贫铀的医学与环境问题已做过大量研究。一般认为对生物的危害性低,且只在长期暴露后才对生物有害,主要是由于贫铀的化学毒性。目前虽已获得大量的生理学数据,但 In recent years, the United States has used depleted uranium armor-piercing projectiles in order to increase the power of armor-piercing bullets. They mainly include the Air Force’s GAU-8 30mm rounds, the Army’s 105mm XM774 anti-tank armor-piercing projectile and the M735E1 Shelling Armor, the Navy’s 20mm square Cannon with armor piercing. Depleted uranium alloy is a high-density armor-piercing core material with high density, high strength, good toughness and post-combustion efficiency. Its strength is much larger than that of tungsten core, but its cost is lower than that of tungsten core. The United States has done a great deal of research on the medical and environmental issues concerning depleted uranium. It is generally considered to be less harmful to living things and harmful to living things only after long-term exposure, mainly due to the chemical toxicity of depleted uranium. Although a large number of physiological data have been obtained,