Effect of Cu content on microstructures and mechanical properties of ADI treated by two-step austempering process
Effect of Cu content on microstructures and mechanical properties of ADI treated by two-step austempering process
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Cu含量对两步等温淬火ADI组织和力学性能的影响
DOI：
10.1007/s41230-019-8145-3
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发表时间：
2019-05
期刊：
影响因子：
1.6
通讯作者：
Wang Chang liang
中科院分区：
文献类型：
--
作者：
Yi Peng yue;Guo Er jun;Wang Li ping;Feng Yi cheng;Wang Chang liang
研究了Cu含量对等温淬火球铁（ADI）两步等温淬火组织和力学性能（屈服强度、抗拉强度、冲击功、断裂韧性）的影响。高Cu含量的球墨铸铁经等温淬火后，残余奥氏体体积分数明显增加，但奥氏体中的碳含量随Cu含量的增加而降低。当Cu含量为1.4%时，奥氏体稳定性达到最大值，然后随着Cu含量的进一步增加，奥氏体稳定性迅速下降。ADI的抗拉强度和屈服强度随Cu含量的增加先增大后减小。当Cu含量从0.2%增加到1.4%时，延伸率保持在6.5%，当Cu含量进一步增加到2.0%时，延伸率迅速增加到10.0%。冲击韧性随Cu含量的增加先增大后减小，当Cu含量为1.4%时，冲击韧性达到最大值122.9J;奥贝球铁的断裂韧性随Cu含量的增加而不断提高。铜对奥贝球铁的影响机理可分为两个方面。一方面，Cu固溶于基体中，起到固溶强化的作用;另一方面，Cu降低了C在奥氏体中的溶解度，并有助于更稳定的残余奥氏体。
The effect of Cu content on the microstructures and mechanical properties (yield strength, ultimate tensile strength, impact energy, fracture toughness) of austempering ductile iron (ADI) treated by two-step austempering process were investigated. High Cu content in nodular cast irons leads to a signifcant volume fraction of retained austenite in the iron after austempering treatment, but the carbon content of austenite decreases with the increasing of Cu content. Moreover, austenitic stability reaches its maximum when the Cu content is 1.4% and then drops rapidly with further increase of Cu. The ultimate tensile strength and yield strength of the ADI frstly increases and then decreases with increasing the Cu content. The elongation keeps constant at 6.5% as the Cu content increases from 0.2% to 1.4%, and then increases rapidly to 10.0% with further increase Cu content to 2.0%. Impact toughness is enhanced with Cu increasing at frst, and reaches a maximum 122.9 J at 1.4% Cu, then decreases with the further increase of Cu. The fracture toughness of ADI shows a constant increase with the increase of Cu content. The infuencing mechanism of Cu on austempered ductile iron (ADI) can be classifed into two aspects. On the one hand, Cu dissolves into the matrix and functions as solid solution strengthening. On the other hand, Cu reduces solubility of C in austenite and contributes more stable retained austenite.
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影响因子：
5.4
作者：
M. Kuna;M. Springmann;K. Mädler;P. Hübner;G. Pusch
通讯作者：
M. Kuna;M. Springmann;K. Mädler;P. Hübner;G. Pusch
DOI：
10.1007/bf02642391
发表时间：
1982-05
期刊：
Metallurgical Transactions A
影响因子：
--
作者：
B. Sandvik
通讯作者：
B. Sandvik
影响因子：
8.4
作者：
Jianghuai Yang;S. Putatunda
通讯作者：
Jianghuai Yang;S. Putatunda
影响因子：
6
作者：
Kim, SJ;Lee, CG;Oh, CS
通讯作者：
Oh, CS
DOI：
10.1016/j.msea.2011.04.035
发表时间：
2011-07-15
影响因子：
6.4
作者：
Hsu, Cheng-Hsun;Lin, Kuan-Ting
通讯作者：
Lin, Kuan-Ting