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首页> 外文会议>New developments on metallurgy and applications of high strength steels >EFFECT OF CONSTITUENT PHASES ON THE MECHANICAL PROPERTIES OF BAINITE-BASE MULTIPHASE STEELS
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EFFECT OF CONSTITUENT PHASES ON THE MECHANICAL PROPERTIES OF BAINITE-BASE MULTIPHASE STEELS

机译：组成相对贝氏体多相钢力学性能的影响

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摘要

Effects of acicular ferrite and retained austenite on the mechanical properties of bainite-base multiphase steels were investigated. Various morphology and volume fraction of constituent phases have been obtained by control of hot rolling conditions and alloy compositions. It has been shown that the steels containing retained austenite have better combinations of strength and ductility than the ones with no retained austenite. However, there is no noticeable change in DBTT by the incorporation of retained austenite in the microstructure since retained austenite exists as fine particles. On the other hand, DBTT of the steels are largely affected by the presence of acicular ferrite in the microstructure. EBSD analyses of fractured Charpy specimens show that cracks are deflected within the morphological packet of acicular ferrite, indicating its role in reducing the effective grain size of the steels.
机译：研究了针状铁素体和残余奥氏体对贝氏体基多相钢力学性能的影响。通过控制热轧条件和合金成分已经获得了组成相的各种形态和体积分数。已经表明，含有残余奥氏体的钢比没有残余奥氏体的钢具有更好的强度和延展性组合。然而，由于残余奥氏体以细颗粒形式存在，因此通过在组织中掺入残余奥氏体，DBTT没有明显变化。另一方面，钢的DBTT受组织中针状铁素体的存在影响很大。断裂夏比试样的EBSD分析表明，裂纹在针状铁素体形态包内发生偏转，表明其在减小钢的有效晶粒度方面发挥了作用。

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