复杂箱体类构件表面多功能涂层技术研究及应用

Study and Application of Multi-functional Coating Technology on Surface of Complex Housing Part

目的 解决某产品箱体等复杂构件耐磨、减摩、抗烧蚀、残渣难清理引起的腐蚀等问题。方法 开展协合涂层工艺研究及应用试验验证,通过扫描电镜观察(SEM)、成分能谱分析(EDS)及厚度、硬度、附着强度(热震法)、中性盐雾试验、球盘式摩擦磨损试验等对涂层进行性能测试。结果 该涂层厚度均匀可控,与基体结合力强,在300~500℃共5个热震循环后,结合力未受影响。硬度高,超过800HV1.0,与铬镀层相当。耐磨性及耐腐蚀性好,6 000次摩擦磨损试验后,无明显磨痕,中性盐雾1 200 h为评级为8级。通过涂层制备工艺对高频淬火部位性能影响研究分析,摸清了涂层制备对高频淬火部位的影响规律。通过箱体等复杂零件试生产,解决了涂层“发花”及“气馕袋”等制备问题。结论 经多轮产品试验验证,该涂层完全能满足产品使用要求。

The work aims to tackle challenging requirements of complex structure such as a housing part,including wear re-sistance,abrasion reduction,anti-ablation,and corrosion resistance against persistent stain.Process and engineering application of the synergistic coating were conducted.Properties of the coating were characterized with SEM/EDS,thickness test,hardness test,adhesion test,neutral salt spray test and ball-disc wear test.The coating exhibited evenly distributed thickness,outstanding adhesion with the substrate after 5 thermal shock cycles at 300~500℃.Its hardness was as high as 800HV1.0,which was simi-lar to that of the chromium plating.It had good wear resistance.There was no obvious scratch after 6000 time wear tests.It had good corrosion resistance with a level 8 rating after 1200 h of neutral salt spray test.Through the study and analysis on the ef-fect of coating preparation technology on the properties of high-frequency quenching parts,the affecting law of coating preparation on high-frequency quenching parts was made clear. Obstacles encountered in manufacturing the coating on the housing part, such as “defective” and “gas-pocketed” areas were resolved. For the housing part, synergistic coating provides a perform-ance that well satisfies the requirement, which is verified by extended product test.