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利用低压化学气相沉积技术(LPCVD),在钻杆接头表面制取Ti、Cr、Al的氮化物、碳化物和氧化物构成的金属陶瓷膜层。陶瓷膜的特性通过SEM、EDS和XRD分析。结合性能和腐蚀性能分别通过划痕试验和腐蚀实验测试。结果表明:陶瓷膜层致密而均匀,膜厚度在15μm左右,且在膜层与基体之间还形成了一层厚5μm左右的过渡层。陶瓷复膜与基体材料结合性能良好,具有较好的致密性,不存在裂纹气孔等缺陷。陶瓷膜层有效阻隔了有害原子或离子与基体钢的接触,防止材料发生氢鼓泡、氢致开裂等,大大提高了钻杆接头材料的抗腐蚀性能。
A low-pressure chemical vapor deposition (LPCVD) technique was used to produce a cermet layer of nitrides, carbides and oxides of Ti, Cr and Al on the surface of the drill pipe joint. The properties of ceramic membranes were analyzed by SEM, EDS and XRD. The combination of performance and corrosion resistance through scratch test and corrosion test. The results show that the ceramic film is dense and uniform, the film thickness is about 15μm, and a transition layer about 5μm thick is formed between the film and the substrate. Ceramic laminating and matrix materials with good bonding performance, with good compactness, there is no crack pores and other defects. Ceramic membrane effectively blocks the contact of harmful atoms or ions with the base steel to prevent the material from hydrogen bubbling and hydrogen cracking, which greatly improves the corrosion resistance of the pipe joint material.