离子氮碳共渗-AlCrN复合涂层制备工艺及力学性能研究
发布时间：2018-10-25 13:06
【摘要】：利用多弧离子镀(Arc ion plating,AIP)技术,在T10钢和SKD11模具钢上经过氮碳共渗处理后镀上AlCr N纳米多层膜。通过控制氮碳共渗层的结构、改变沉积AlCrN涂层时的温度和粘结层氮气偏压得到不同工艺条件下的样品,通过X射线衍射仪、扫描电镜、透射电镜研究了涂层相结构和横截面组织,利用划痕仪、维氏硬度计、摩擦磨损仪对涂层结合力、硬度、摩擦性能等力学性能进行测试。研究结果如下:(1)在T10钢基体上利用离子氮碳共渗技术,制备氮碳共渗层后再镀上AlCrN涂层,得到氮碳共渗-AlCr N复合涂层。氮碳共渗层的存在为AlCrN涂层与基体之间提供了良好的过渡层。与未经氮碳共渗预处理的AlCrN单一涂层相比,复合涂层的结合力上升10N,摩擦系数从0.6下降到0.4。(2)在不同的沉积温度和不同状态的SKD11模具钢上沉积AlCrN涂层,随着沉积温度的升高,复合涂层的组织变得致密。在350℃、400℃、450℃下沉积涂层的效率分别为0.533μm/h、0.587μm/h、0.674μm/h。在相同的沉积温度下,复合涂层的耐磨性比单一AlCrN涂层提升了3~4倍。(3)在有无氮碳共渗层SKD11模具钢上,改变沉积粘结层时的氮气偏压,分别在0.8 Pa、2 Pa和3 Pa的氮气偏压下沉积AlCrN涂层。在复合涂层中,随着氮气偏压的增加在粘结层中形成了{200}Cr N的择优取向,结合力从48 N提升到65 N,上升的结合力对硬度和耐磨性能的提升是有帮助的。
[Abstract]:AlCr N nanocrystalline multilayer films were deposited on T10 steel and SKD11 die steel by means of multi-arc ion plating (Arc ion plating,AIP). By controlling the structure of the nitrocarburized layer, changing the temperature of the AlCrN coating and the bias pressure of the bonding layer nitrogen, the samples under different technological conditions were obtained, and the samples were obtained by X-ray diffractometer and scanning electron microscope (SEM). The phase structure and cross section structure of the coating were studied by TEM. The adhesion, hardness and friction properties of the coating were measured by scratch tester, Vickers hardness tester and friction and wear tester. The results are as follows: (1) Nitrocarburized AlCrN coating was prepared on T10 steel substrate by ion nitrocarburizing technique, and then AlCrN coating was deposited on T10 steel substrate to obtain nitrocarburization-AlCr N composite coating. The existence of nitrocarburizing layer provides a good transition layer between AlCrN coating and substrate. Compared with the single AlCrN coating without nitrocarburizing pretreatment, the adhesion of the composite coating increased by 10 N, and the friction coefficient decreased from 0.6 to 0.4. (2) the AlCrN coating was deposited on SKD11 die steel at different deposition temperatures and different states, with the increase of deposition temperature. The microstructure of the composite coating becomes compact. The efficiency of the coating deposited at 350 鈩，
本文编号：2293775
[Abstract]:AlCr N nanocrystalline multilayer films were deposited on T10 steel and SKD11 die steel by means of multi-arc ion plating (Arc ion plating,AIP). By controlling the structure of the nitrocarburized layer, changing the temperature of the AlCrN coating and the bias pressure of the bonding layer nitrogen, the samples under different technological conditions were obtained, and the samples were obtained by X-ray diffractometer and scanning electron microscope (SEM). The phase structure and cross section structure of the coating were studied by TEM. The adhesion, hardness and friction properties of the coating were measured by scratch tester, Vickers hardness tester and friction and wear tester. The results are as follows: (1) Nitrocarburized AlCrN coating was prepared on T10 steel substrate by ion nitrocarburizing technique, and then AlCrN coating was deposited on T10 steel substrate to obtain nitrocarburization-AlCr N composite coating. The existence of nitrocarburizing layer provides a good transition layer between AlCrN coating and substrate. Compared with the single AlCrN coating without nitrocarburizing pretreatment, the adhesion of the composite coating increased by 10 N, and the friction coefficient decreased from 0.6 to 0.4. (2) the AlCrN coating was deposited on SKD11 die steel at different deposition temperatures and different states, with the increase of deposition temperature. The microstructure of the composite coating becomes compact. The efficiency of the coating deposited at 350 鈩，
本文编号：2293775
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