摘要
利用真空熔炼技术制备了添加硼和不添加硼(B)的Fe基形状记忆合金。利用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)对合金进行了微观结构和组成分析;研究了B对Fe基合金显微硬度、回复率和抗硫化氢腐蚀性能的影响。结果表明:实验制得的Fe基形状记忆合金具有较高的回复率,且随着压缩量的增加回复率逐渐减小;合金中加入B可促进组织细化和Cr23C6的析出;相比不添加B的Fe基形状记忆合金,含B合金的显微硬度提高了12.4%,回复率显著增加,并且在较大变形量下保证了合金更加稳定的形状记忆效应;在硫化氢腐蚀环境下,添加B的Fe形状记忆合金表面的可形成致密的氧化膜,有效降低硫化氢的腐蚀速率,提供其腐蚀性能。
Vacuum melting technology was used to prepare Fe based shape memory alloy with addition of Boron or non-Boron. Scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) were used to study the microstructure and composition of the Fe based alloy. The effect of boron to the micro-hardness, shape recovery percentage and Hydrogen Sulfide corrosion properties of the obtained alloy were also analyzed. The results show that the produced Fe based shape memory alloy had good shape recovery ability. In addition, the shape recovery effect of the alloys decreased with compress deformation increasing, gradually. The addition of Boron can promote microstructure refinement and the precipitation of Cr23C6. Comparing with the alloy without Boron, the micro-hardness of alloy with addition of Boron increased 12.4% and exhibited a better shape recovery percentage, developing a more stable shape memory ability at larger deformation condition. The dense oxide film would form on the surface of the alloy with adding Boron, which could effectively decrease the corrosion rate by Hydrogen Sulfide.
出处
《材料科学》
CAS
2020年第11期843-850,共8页
Material Sciences
