Armour-plate and process for its manufacture

US4645720A · kind A · utility

Assignee

• Thyssen Stahl AG · DE

Inventors

• Hans Pircher · Oberndorf bei Salzburg, AT
• Werner Bentz · Hattingen, DE
• Alfred Tegethoff · Ratingen, DE

Key dates

• Filing date: Nov 1, 1984
• Grant date: Feb 24, 1987
• Expiry date: Nov 1, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12965
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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.