不锈钢打磨砂带用酚醛树脂关键参数测试与分析

针对不锈钢磨削砂带用酚醛树脂的基本理化指标难以全面表征砂带磨削性能的问题，选取基础参数相同的4种酚醛树脂为研究对象，对酚醛树脂进行热重(thermogravimetric，TG)、冲击强度分析，并在同等工艺条件下对用其制作的4种砂带进行剥离强度和磨削性能测试，探究酚醛树脂与砂带磨削性能的相关性。结果表明:当酚醛树脂的固体质量分数(以下简称“固含量”)、黏度、水溶性和pH值等基础参数基本相同时，4种砂带的磨削比、磨削效率和工件表面粗糙度最大值分别相差31.8%，27.2%，27.6%。酚醛树脂的热重、冲击强度和用其制作的砂带剥离强度都与砂带的磨削性能正相关；砂带磨削不锈钢时的主要失效形式为磨粒磨耗磨损、磨粒黏屑以及磨屑严重堵塞容屑空间。 

Test and analysis of key parameters of phenolic resin for stainless steel grinding belt

To solve the problem that the basic physical and chemical indexes of phenolic resin for stainless steel grinding belt was difficult to fully characterize the grinding performance of the belt, four phenolic resins with the same basic parameters were selected as the research objects. The thermogravimetric(TG) and the impact strength of the phenolic resin were analyzed, the peel strengths and the grinding performances of four belts prepared with four phenolic resins were tested under the same process conditions, the correlation between phenolic resins and abrasive belt grinding performances were explored . The results show that when the basic parameters such as solid content, viscosity, water solubility and pH value of phenolic resins are basically the same, the maximum values of the grinding ratio, the grinding efficiency and the workpiece surface roughness of the four abrasive belts differ by 31.8%, 27.2% and 27.6% respectively. The TG, the impact strength of phenolic resins and the peel strength of the belts made of phenolic resins are positively related to the grinding performance of the belts. The main failure modes of abrasive belts grinding stainless steel are abrasive wear, abrasive particles adhere to debris and debris seriously blocking the chip space.