不同润湿剂对陶瓷结合剂CBN砂轮成型料性能的影响

Influence of different wetting agents on the properties of vitrified CBN grinding wheel mixture

润湿剂直接影响陶瓷结合剂CBN砂轮成型料的可成型性,进而影响砂轮组织的均匀性。实验以糊精液作对比,探讨聚乙烯醇缩丁醛(PVB)乙醇溶液、聚丙烯酰胺(PAM)水溶液、聚乙二醇(PEG–6000)水溶液、异丁烯–马来酸酐共聚物(ISOBAM–110)水溶液4种新型润湿剂对陶瓷结合剂CBN砂轮成型料混合均匀性、松装密度、湿坯强度和组织均匀性的影响。结果表明:ISOBAM–110水溶液和PAM水溶液所混成型料均匀一致,各项性能较糊精液均有明显改善,二者松装密度较糊精液的分别提升46.59%和51.14%,湿坯强度分别提升17.71%和35.08%,砂轮不均匀率分别降低23.75%和8.75%。

The formability of vitrified CBN grinding wheel mixture is directly affected by wetting agent,which further affects the microstructure uniformity of grinding wheel.In this study,four new wetting agents,PVB ethanol solution,PAM water solution,PEG-6000 water solution and ISOBAM-110 water solution,were selected to compare with dextrin solution.The effects of these wetting agents on mixture uniformity,loose density,strength and microstructure of vitrified CBN grinding wheel mixture were studied.The results show that the mixtures with ISOBAM-110 and PAM are uniform,whose loose density are increased by 46.59%and 51.14%respectively with the strength of the segment increased by 17.71%and 35.08%and the inhomogeneity of grinding wheel decreased by 23.75%and 8.75%.The properties of the mixtures are improved obviously compared with dextrin solution.