75Л铸造装甲钢 一、简介 75Л为74Л的系列钢种,同属铬镍钼系合金钢,其铬镍钼含量略高于74Л。机械性能及淬透性均高于74Л。其他各方面性能与74Л无大区别。 苏联的重型坦克T-10的炮塔及车体均采用本钢种铸造,其炮塔最大垂直壁厚约为250毫米,车体最大垂直壁厚约为270毫米。 75Л的淬透性高达350毫米,适用于制造厚度在350毫米以下的均质中硬度抗炮弹的铸造装甲件。 75LL cast armored steel I. Introduction 75Л 74LS series of steel, both chromium-nickel-molybdenum alloy steel, the chromium-nickel-molybdenum content slightly higher than 74Л. Mechanical properties and hardenability are higher than 74. Other aspects of the performance and no big difference 74. The Soviet heavy tank T-10 turrets and body are made of the steel casting, the turret vertical maximum thickness of about 250 mm, the maximum vertical body thickness of about 270 mm wall thickness. With a hardenability of up to 350 mm, the 75Л is suitable for the manufacture of cast armor pieces of homogeneous, medium-hardness, anti-artillery shells up to a thickness of 350 mm.