基于修复涂层力学性能影响规律的再制造毛坯表面污染物状态评估

Surface Contamination State Evaluation for Remanufacturing Cores Based onInfluence Laws of Restoring Coating Mechanics Properties

针对再制造工程中毛坯修复前的表面污染腐蚀物及其预处理工艺问题,结合再制造毛坯预处理及修复实验,分析了毛坯表面污染腐蚀物含量对修复涂层性能的影响规律。通过对再制造毛坯表面污染腐蚀物含量的研究,分析其对再制造修复涂层质量的影响规律,而后设计了考虑污染腐蚀物含量的再制造修复涂层结构样件,对其涂层结构的微观组织与力学性能进行了检测及对比分析,检测结果表明,表面污染腐蚀物增多会导致其后续修复涂层结构的力学性能迅速下降,且其影响规律是非线性的。最后,结合力学实验结果构造了该影响规律的映射函数,在考虑再制造修复涂层服役性能需求下,基于该函数可给出表面污染物含量的合理阈值区间,从而进一步合理规划再制造毛坯预处理工艺,为再制造工程实践提供数据及技术基础。

Aiming at the problems of surface contamination of remanufacturing cores before restoring and pretreatment processes in remanufacturing engineering,the influences of surface contamination contents on the performances of restoring coatings were presented by pretreating and restoring experiments.Informed by the investigation of surface contamination contents of remanufacturing cores,the effects of surface contamination on the coating performance were discussed.After cladding the coating samples with different surface contamination contents,the microstructures and mechanics properties of coating structures were tested and analyzed.The testing results show that with increasing of contamination,the mechanics properties of the restoring coating structures are rapidly decreasing with nonlinear correlation.Finally,combining with the mechanics experimental results,the mapping function of influence law was constructed.Considering the service performance requirements of remanufacturing restoring coatings,the reasonable threshold interval of surface contamination content may be given,and then the pretreatment processes of remanufacturing cores may be planned reasonably,which provides data and technical basis for remanufacturing engineering practice.