| 摘要 |
<p>Armour-plate comprising a two layer bonded subsequently heat-treated clad steel comprising an upper layer and a base layer wherein: (a) the upper layer contains (in percent by weight) -0.30 to 0.80% carbon -0.10 to 0.80% silicon -0.40 to 1.20% manganese -up to 0.015% phosphorus -up to 0.015% sulfur -0.20 to 2.80% chromium -0.05 to 1.00% molybdenum -0.01 to 0.05% aluminum -up to 0.40% nickel - remainder iron including unavoidable impurities; (b) said base layer contains (in percent by weight) -0.17 to 0.40% carbon -0.10 to 0.80% silicon -0.40 to 2.00% manganese -up to 0.025% phosphorus -up to 0.025% sulfur -0.10 to 1.50% chromium -0.05 to 1.50% molybdenum -0.01 to 0.05% aluminum - remainder iron including unavoidable impurities the carbon content of said upper layer being substantially higher than the carbon content of said base material. The armour-plate is useful in vehicles such as tanks, personnel carriers, jeeps, ships and planes.</p> |
