铸造2017，Vol.66Issue(9)：970-975,6.
机械振动对变质Fe-B-C合金组织和性能的影响
Effects of Mechanical Vibration on Microstructure and Mechanical Properties of Modified Fe-B-C Alloy
摘要
Abstract
The mechanical vibration was applied to the modified Fe-B-C alloy in the process of solidification, the effects of vibration frequency on microstructure and mechanical properties were investigated. The results show that the microstructure of Fe-B-C alloy is composed of ferrite, pearlite and borides that distribute reticularly along the grain boundaries;after Ti modification, the matrix and borides are refined, the necking and net-breaking borides are observed. With mechanical vibration during the process of solidification of the modified alloy, the microstructure of the outer sphere of the ingot is effectively refined, the grain becomes smaller and more net-breaking borides appear. With the increase of vibration frequency, the grain becomes smaller and more homogeneous;the net-breaking phenomenon is more obvious. The matrix morphology of the center of the ingot is finer but the grain becomes coarsening. The mechanical properties of the alloy improve with the increase of vibration frequency, when vibration frequency is 30Hz, the hardness of the alloy is HRC 44.5 and the impact toughness is 7.3 J/cm2.关键词
Fe-B-C合金/变质处理/机械振动/凝固组织/力学性能Key words
Fe-B-C alloy/modification/mechanical vibration/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
郑开宏,张琦,王海艳,王娟,郑志斌..机械振动对变质Fe-B-C合金组织和性能的影响[J].铸造,2017,66(9):970-975,6.基金项目
广东省科技计划项目国际科技合作领域(2014B050503007) （2014B050503007）
广东省科学院科研平台环境与能力建设专项(2016GDASPT-0320) （2016GDASPT-0320）
广州市科技计划项目产学研协同创新重大专项(201604046009). （201604046009）
