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首页> 外文期刊>Journal of Korean Institute of Metal and Materials >Effect of Mo, Cr, and V on Tensile and Charpy Impact Properties of API X80 Linepipe Steels Rolled in Single Phase Region
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Effect of Mo, Cr, and V on Tensile and Charpy Impact Properties of API X80 Linepipe Steels Rolled in Single Phase Region

机译：钼，铬和钒对单相区轧制API X80管线钢的拉伸和夏比冲击性能的影响

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摘要

This study is concerned with the effects of Mo, Cr, and V addition on tensile and Charpy impact properties of API X80 linepipe steels. Four kinds of steels were processed by varying Mo, Cr, and V additions, and their microstructures and tensile and Charpy impact properties were investigated. Since the addition of Mo and V promoted to form fine acicular ferrite and granular bainite, while prohibiting the coarsening of granular bainite, it increased the strength and upper shelf energy, and decreased the energy transition temperature. The Cr addition promoted the formation of coarse granular bainite and secondary phases such as martensite-austenite constituents, thereby leading to the increased effective grain size, energy transition temperature, and strength and to the decreased upper shelf energy. The steel containing 0.3wt. percent Mo and 0.06wt. percent V without Cr had the highest upper shelf energy and the lowest energy transition temperature because its microstructure was composed of fine acicular ferrite and granular bainite, together with a small amount of hard secondary phases, while its tensile properties maintained excellent.
机译：这项研究与添加Mo，Cr和V对API X80管线钢的拉伸和夏比冲击性能的影响有关。通过改变Mo，Cr和V的添加量对四种钢进行了加工，研究了它们的显微组织以及拉伸和夏比冲击性能。由于Mo和V的添加促进了形成细针状铁素体和粒状贝氏体，因此在阻止粒状贝氏体粗大化的同时，增加了强度和上架能，并且降低了能量转变温度。 Cr的添加促进了粗大贝氏体和诸如马氏体-奥氏体成分的第二相的形成，从而导致有效晶粒尺寸，能量转变温度和强度增加，并且上架能量降低。含0.3wt％的钢。 ％的Mo和0.06wt。％。不含Cr的5％V具有最高的上架能量和最低的能量转变温度，这是因为其微观结构由细小的针状铁素体和粒状贝氏体以及少量的硬质第二相组成，同时其拉伸性能保持优异。

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