Development of Armor High Strength Steel (HSS) Martensitic Plates for Troops Carriers
Development of Armor High Strength Steel (HSS) Martensitic Plates for Troops Carriers
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运兵车用装甲高强度钢（HSS）马氏体板的开发
DOI：
10.4028/www.scientific.net/msf.879.489
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
N. Dawood
中科院分区：
文献类型：
--
作者：
T. El;Eman El;Maha El;Almosilhy Almosilhy;N. Dawood
本文讨论的是装甲运兵车用马氏体钢板的调节。将钢合金加工成钢锭。将铸锭热平轧至80毫米，然后轧制至6毫米。采集用于检测临界转变温度的样品。检测到的 Ac1、Ac3、Ms 和 Mf 温度分别为 716、835、356 和 218 °C。 80mm 的显微组织包含板状马氏体团，而 6mm 的板则显示出完整的板状马氏体结构。两种情况都含有嵌入的碳化物。提出热处理循环以增强防弹性能。处理包括在 910°C 奥氏体化 20 分钟，然后水淬。该过程显露出完全细小的板条马氏体组。对淬火钢板和轧制钢板进行回火。 350°C 回火会导致一些马氏体解离，并促进捕获的碳原子迁移，形成嵌入马氏体板组之间的碳化物聚集体。在 250°C 下回火 20 分钟，可消除淬火引起的应力，并显露出板条马氏体结构和少量玫瑰花状碳化物。该工艺将伸长率从 3% 提高到 11.35%。 300 oC 20-30 分钟轧制回火板的显微组织在马氏体包周围的边界上包含一层薄铁素体层，并且在马氏体包之间含有少量棉绒状碳化物。处理周期提高了机械性能。两种处理（在 250 和 300 oC 下）均显示出成功的防弹板可抵抗 3 颗子弹的射击。
The present article is dealing with the conditioning of martensitic steel plates for armoring troops carriers. The steel alloy was processed into ingots. The ingots were hot flat rolled to 80 mm, followed by rolling to 6 mm. Specimens for detection of the critical transformation temperatures were taken. The Ac1, Ac3, Ms and Mf temperatures were detected as 716, 835, 356 and 218 °C respectively. The 80mm microstructure contains plate martensite colonies, while the 6mm plates reveal complete plate martensitic structure. Both cases contain embedded carbides. Heat treatment cycles were proposed for enhancing the ballistic resistance. A treatment was consisting of austentizing at 910 °C for 20 min., followed by water quenching. This process revealed fully fine lath martensitic packets. Tempering was done on the quenched as well as on rolled plates. Tempering at 350°C, causes dissociation of some martensite, and encourages migration of the entrapped carbon atoms forming carbide aggregates embedded between martensite plates packets. Tempering at 250°C for 20 min., relieves quenching induced stresses and reveals a lath martensitic structure with a small fraction of rosette like carbides. The process enhances elongation from 3% to 11.35%. The microstructure of as-rolled tempered plates at 300 oC for 20-30 minutes contains a thin ferrite layer on the boundaries surrounding the martensite packets, and few fractions of cotton wool shape carbides between the martensite packets. The treatment cycle improves the mechanical properties. Both treatments, at 250 and 300 oC, show successful ballistic resistance plates against shooting by 3 bullets.