【摘 要】
：
0.10C-1.5Mn-0.05Nb钢通过控制轧制及随后水冷获得了双相组织。这种双相钢具有较高的强度[σ_B=95Ksi(66.5kg/mm~2),σ_(0.2)=78Ksi(54.6kg/mm~2)]和良好的韧性,-100℃时的查
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0.10C-1.5Mn-0.05Nb钢通过控制轧制及随后水冷获得了双相组织。这种双相钢具有较高的强度[σ_B=95Ksi(66.5kg/mm~2),σ_(0.2)=78Ksi(54.6kg/mm~2)]和良好的韧性,-100℃时的查贝(Charpy)冲击功C_V=202.3焦耳(20.64kg-M),脆性转折温度低达-110℃。其显微组织是由高位错密度的针状铁素体基体和马氏体(或贝氏体)“小岛”所组成。本文使用光学金相、复型电镜和薄膜透射电镜研究和分析这类双相组织的形貌、结构特征及其形成过程。
The 0.10C-1.5Mn-0.05Nb steel obtained dual-phase microstructure by controlled rolling and subsequent water cooling. This dual phase steel has higher strength [σ B = 95Ksi (66.5kg / mm 2), σ 0.2 (78.6si / 54.6kg / mm 2)] and good ductility, (Charpy) Impact work C_V = 202.3 Joules (20.64 kg-M), brittle transition temperature as low as -110 ° C. The microstructure consists of acicular ferrite matrix with high dislocation density and martensite (or bainite) “island ”. In this paper, optical metallography, multi-mode electron microscopy and thin-film transmission electron microscopy study and analysis of such dual-phase morphology, structural features and formation process.
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