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Influence of process parameters on thickness and wear resistance of rare earth modified chromium coatings on P110 steel synthesized by pack cementation林乃明1,谢发勤1,吴向清1,田伟1,21. School of Aeronautics, Northwestern Polytechnical University2. Tubular Goods Research Institute, China National Petroleum Corporation摘 要:The pack cementation was employed to produce......
Influence of adding various rare earths on microstructures and corrosion resistance of chromizing coatings prepared via pack cementation on P110 steel林乃明1,谢发勤1,钟涛1,吴向清1,田伟1,21. School of Aeronautics... chromizing coatings were formed onto its surface with/without addition of rare earths via pack cementation process.The surface morphologies and microstructures of the chromizing coatings were observed......
Influence of process parameters on thickness and wear resistance of rare earth modified chromium coatings on P110 steel synthesized by pack cementation林乃明1,谢发勤1,吴向清1,田伟1,21. School of Aeronautics, Northwestern Polytechnical University2. Tubular Goods Research Institute, China National Petroleum Corporation摘 要:The pack cementation was employed to produce......
’an 710072, China)Abstract:Si-Ce co-deposition coatings were prepared on an Nb-silicide-based ultrahigh temperature alloy by pack cementation processes at 1 150 ℃ for 8 h. The effects of CeO2 content in pack... cementation process; microstructure; oxidation resistance......
Trans. Nonferrous Met. Soc. China 25(2015) 803-810 Microstructure and high temperature oxidation resistance of Si-Y co-deposition coatings prepared on TiAl alloy by pack cementation process Yong-quan... prepared by pack cementation process at 1030, 1080 and 1130 °C, respectively, for 5 h. The microstructures, phase constitutions and oxidation behavior of these coatings were studied. The results show......
cementation processes at 1 050, 1 150 and 1 250 ℃ for 5, 10, 15 and 20 h, respectively. The coating structure, phase constituents and compositional distribution were investigated by SEM, EDS and XRD... cementation process; Y2O3; structure formation 铌硅化物基超高温合金以其低密度,耐腐蚀和良好的高温强度......
at ambient temperature is in agreement with theoretical prediction by Gibson–Ashby model. Key words: metallic foam; Ni foam; vapour deposition; coating; heat treatment; pack cementation 1 Introduction... template must be taken into consideration [6]. The pack cementation process is an efficient and cost effective method to improve the surface properties of materials [7]. Pack-chromizing has been widely......
activated pack cementation process[J]. Journal of Alloys and Compounds, 2016, 682: 695-705. [14] 吴多利, 姜肃猛, 范其香, 宫 骏, 孙 超. 镍基高温合金Al-Cr涂层的恒温氧化行为[J]. 金属学报, 2014, 50(10): 1170-1178. WU Duo-li, JIANG Su-meng...;then decrease. Key words: open-cell metal foam; pack cementation process; high-temperature solid-phase diffusion; alloying; mechanical properties Foundation item: Project(51501133) supported......
304奥氏体不锈钢粉末渗硅层的结构和性能 潘励1,王金兰1,罗新民1,陈康敏1 (1.江苏大学材料学院,江苏,镇江,212013) 摘要:为了提高高镍铬含量不锈钢的抗渗碳性,探索了奥氏体不锈钢表面的渗硅效果.通过扩散处理,在304奥氏体不锈钢表面获得了结构致密的渗硅层.应用SEM电镜和EDS能谱分析,显微硬度测定等方法观察了渗硅层的微观结构及其性能.结果表明,渗硅层厚度达50μm以上,为典型的柱状晶结构;渗层晶粒中由里到外的硅浓度分布区间为12.24%~20.93%;相应的微观组织的细密程度由表及里呈梯度分布,与基体结合处呈纳米晶结构;显微硬度由里到外在406~477 HV1N.缺口断裂法试验结果表明,渗硅层与钢基体结合十分良好. 关键词:粉末渗硅; 奥氏体不锈钢; 梯度材料; 微观组织; 纳米表面; 结合强度; pack cementation siliconized......
by pack cementation and slurry-sintering method. The ablation resistance of the SiC/ZrC-ZrB2 coating was tested under plasma flame above 2300 °C. The results indicate that the SiC/ZrC-ZrB2 double layer... flame. Key words: ablation; pack cementation; slurry; SiC/ZrC-ZrB2 coating Cite this article as: LIU Han-zhou, YANG Xin, FANG Cun-qian, SHI An-hong, CHEN Lei, HUANG Qi-zhong. Ablation resistance......
