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首页> 外文期刊>American Journal of Engineering Research >The Influence of Austenitizing Temperature and Austempering Time on the Microstructure and Mechanical Properties of Alloyed Austempered Ductile Cast Iron
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The Influence of Austenitizing Temperature and Austempering Time on the Microstructure and Mechanical Properties of Alloyed Austempered Ductile Cast Iron

机译：奥氏体化温度和奥斯特稳态时间对合金不合型延展性铸铁微观结构和力学性能的影响

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The effect of austenitising temperature and austempering time on the microstructure andmechanical properties of alloyed Ni-Mo-Cu ductile iron was investigated. The specimens were austenitised at850, 875, 900 and 9300C for 2 hrs, then austempered for 10, 30, 60, 120, 240 and 360 min at 3500C, andexamined by optical microscopy. The volume fraction of retained austenite, bainite, martensite and austenitecarbon-content results were then correlated with microstructural changes, the kinetics of transformation andimpact toughness. Following short periods of austempering time, the carbon content of the retained austenite islow and on subsequent cooling to room temperature it transforms to martensite, resulting in low impact values.The carbon content of the austenite was evaluated by measuring the lattice parameters using X-ray diffraction.Optimum properties were obtained at 9000C for intermediate austempering periods (120-240 min).
机译：研究了奥氏体温度和奥氏体静脉时间对合金镍铬铜延性铁的微观结构和机械性能的影响。试样AT850,875,900和9300℃的奥氏体，然后在350℃下达到10,30,60,120,240和360分钟，并通过光学显微镜探测。然后将保留奥氏体，贝氏体，马氏体和奥氏体碳含量结果的体积分数与微观结构变化相关，转化韧性的动力学。在短时间内的奥氏体时间后，保留奥氏体含量的碳含量和随后的冷却至室温它转化为马氏体，导致抗冲击值低。通过使用X射线测量晶格参数来评价奥氏体的碳含量衍射。在900℃下获得70℃的优次，用于中间稳定性期（120-240分钟）。

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