In order to improve the anti-stick and corrosion resistance of plastic mechanical screws,NiCrN coatings with different Ni content were prepared on 38CrMoAl matrix by multi-arc ion plating technology,and the effects of Ni content on coating structure,hardness,anti-stick performance and corrosion resistance were systematically studied.The results showed that the interface between the layers of the prepared coating was clear and complete,and it was mainly composed of Ni phase,Cr2N and CrN ceramic phase.With the increase of Ni content in the coating,the bond between the coating and the matrix was more firm,and the contact angle showed a trend of first decreasing and then increasing,reaching a maximum when the Ni content was 7.65％.The results of salt spray corrosion experiment and electrochemical corrosion experiment showed that the coating with Ni content of 7.65％had the best corrosion resistance.The CrNiN coating with Ni content of 7.65％had the best comprehensive performance,which effectively improved the service life of the injection molding machine screw and injection mold.
关键词
螺杆/PVD/NiCrN涂层/微观结构/抗粘耐蚀
Key words
screw/PVD/NiCrN coating/microstructure/anti-adhesive and corrosion-resistant
维普
万方数据