A study on microstructure and toughness of copper alloyed and.austempered ductile irons
A study on microstructure and toughness of copper alloyed and.austempered ductile irons
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DOI：
10.1016/j.msea.2011.04.035
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发表时间：
2011-07-15
期刊：
影响因子：
6.4
通讯作者：
Lin, Kuan-Ting
中科院分区：
文献类型：
--
作者：
Hsu, Cheng-Hsun;Lin, Kuan-Ting
在这项研究中，球墨铸铁与1重量%的铜合金等温淬火，成为等温淬火球墨铸铁（ADI）。对球墨铸铁的显微组织、冲击韧性和断裂韧性进行了评价，以确定铜合金化和等温淬火处理对球墨铸铁韧性的影响。结果表明，由于铜增加了奥贝球铁中的残余奥氏体含量，因此，铜合金奥贝球铁的冲击韧性和断裂韧性（K（IC）值）均比未合金奥贝球铁高。特别是，通过在更高的等温淬火温度（360 ℃）下处理铜合金化球墨铸铁以在其显微组织中获得更多的残余奥氏体，可以有效地改善ADI的冲击韧性和断裂韧性。(C)2011 Elsevier B.V.保留所有权利。
In this study, ductile irons with and without 1 wt% copper alloy were austempered to become austempered ductile irons (ADIs). Microstructure, impact toughness, and fracture toughness were evaluated to determine how both the copper alloying and austempering treatments influenced the toughness properties of ductile irons. The results show that, because copper increases the retained austenite content in ADI, the Cu-alloyed ADI has better impact toughness and fracture toughness (K(IC) value) than does the unalloyed one. In particular, the impact toughness and the fracture toughness of ADI could be efficiently improved by treating the Cu-alloyed ductile iron at a higher austempering temperature (360 degrees C) to obtain more retained austenite in its microstructure. (C) 2011 Elsevier B.V. All rights reserved.