Ti6Al4V合金离子渗Mo组织结构及其腐蚀性能研究

利用等离子表面合金化技术在Ti6Al4V合金基体上制备渗Mo改性层，并与Ti6Al4V基材对比考察在0.5mol／L HCl溶液中的电化学腐蚀性能及在沸腾的37％HCl中的化学腐蚀性能．结果表明，与基材相比Mo改性层在0.5mol／LHCl溶液中的自腐蚀电位提高，腐蚀速率增大；在37％HCl中腐蚀速率明显降低．     

双相TiAl中γ层片界面的Σ值及界面的稳定性

材料的力学性能与其内部界面结构特性（如Σ值）及其分布有密切的关系，通过各种处理可改变材料内不同Σ值晶粒边界的分布比例，达到改善力学性能的目的。层状组织的引入使ＴｉＡｌ合金的性能发生了很大改变。在同一层片组织中，α２层片与γ层片及γ层片与γ层片间以特定...     

Plasma boronizing of Ti6AlV4 using solid precursors by double glow plasma alloying technique

Solid state B-offerings （FeB compound） were used for plasma-assisted boronizing on Ti6Al4V alloy by double glow discharge plasma alloying technique （DGPSA）. During all experiment processing there was no harmful and toxic. The thickness and morphology, phase formation, elements concentrations and wear properties of boride layers were examined by means of optical microscopy, Vickers microhardness, X-ray diffraction, glow discharge optical emission spectroscopy and Ball-disk wear tests. The results show that friction coefficient of boride alloying samples versus cortmdum ball is lower than that of Ti6Al4V samples, as well as wear rate. This indicates that plasma-assisted boronizing of Ti6Al4V alloy has a high potential for industrial applications under tribological conditions.     

辉光放电光谱仪逐层分析Cr12钢表面渗硼层

采用两种不同的工艺在Cr12钢表面制备渗硼层,利用辉光放电光谱仪对两种工艺形成的Cr12表面渗硼层进行逐层分析。结果表明:1#试样(1000℃处理10h)渗硼层在距表面0～20μm内均由质量分数为8.8%的硼组成,随后硼的含量逐渐降低;2#试样(900℃处理10h)渗硼层的硼含量在表面较低,随后逐渐升高到质量分数为5%左右,接着又缓慢降低。由此推测1#试样的表面可能存在Fe2B;2#试样的表面可能由硼在铁中的α固溶体组成。为了验证辉光放电光谱仪逐层分析渗硼层的可靠性,利用XRD分析了渗硼层的相结构,结果表