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运用电弧离子镀技术,采用独立的纯Ti和纯Al靶材在超超临界汽轮机叶片用X12CrMoWVNbN10-1-1耐热钢表面沉积TiAlN涂层。利用扫描电子显微镜和能谱仪等对涂层微观组织结构和成分等进行分析,并在室温到650℃温度区间测试涂层的抗热震性能。结果表明:TiAlN涂层表面光滑平整、均匀致密且无明显的空洞,涂层表面的Ti/Al原子比约为0.94;涂层的表面硬度值为1802HV0.1。经X射线衍射法分析,涂层表面的相为TiAlN相,具有(200)晶面择优取向;涂层在室温到650℃之间经受100次热震循环实验后,没有发生明显开裂,说明涂层与基体结合良好,但涂层表面出现一定程度的氧化现象。
Using arc ion plating technology, TiAlN coatings were deposited on the surface of X12CrMoWVNbN10-1-1 heat-resisting steel with ultra-supercritical steam turbine blades by using pure pure Ti and pure Al targets. The microstructure and composition of the coating were analyzed by scanning electron microscopy and energy dispersive spectroscopy. The thermal shock resistance of the coating was tested at room temperature to 650 ℃. The results show that the surface of TiAlN coating is smooth, uniform, compact and free of voids. The Ti / Al atomic ratio of the coating is about 0.94. The surface hardness of the coating is 1802HV0.1. By X-ray diffraction analysis, the coating surface phase TiAlN phase, with (200) crystal plane preferred orientation; coating at room temperature to 650 ℃ after 100 thermal shock cycle experiments, no significant cracking, indicating that the coating Layer and the substrate well, but the coating surface a certain degree of oxidation.