首页> 美国政府科技报告 >Metallurgical Examination of Twelve 2 1/2 Inch Thick Rolled Homogeneous and Sixteen 2 1/2 Inch Thick Face Hardened Armor Plates Manufactured by Carnegie-Illinois Steel Corporation
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Metallurgical Examination of Twelve 2 1/2 Inch Thick Rolled Homogeneous and Sixteen 2 1/2 Inch Thick Face Hardened Armor Plates Manufactured by Carnegie-Illinois Steel Corporation

机译:十二2 1/2英寸厚的冶金检查轧制齐十六2个1/2英寸厚的硬化面装甲钢由卡内基 - 伊利诺伊钢铁株式会社制

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A metallurgical examination was conducted on twelve (12) 2 1/2 in thick rolled homogeneous and sixteen (16) 2 1/2 in thick rolled face hardened armor plates manufactured by Carnegie-Illinois Steel Corporation on OCO-D Project 1558. The results of this investigation that, in general, the steel soundness of the face hardened plates was inferior to that of the homogeneous plates. In this connection, the face hardened plates had more pronounced directional properties than the homogeneous plates. The average Brinell hardness of the homogeneous plates was 247-262. The average Brinell hardness of the face hardened series was found to be face, 465-690, and core 208-243. The depth of the effective case at Rockwell C 50 varied from .26 in- 40-in. from the plate (10 plates tested) while in two face hardened plates the case depth was .09-in -.16-in from face of plate. In general, the homogeneous and face hardened plates were properly heat treated resulting in fibrous fractures, good V-notch impact properties and a satisfactory microstructure.

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