改性酚醛树脂对树脂结合剂砂轮胎体性能的影响

Effect of modified phenolic resin on performance of resin bond for super hard wheel

选用4种不同超硬材料树脂砂轮专用改性酚醛树脂,分别制备树脂结合剂砂轮胎体。使用综合热分析仪、万能力学试验机、洛氏硬度仪和超景深显微镜分析4种改性酚醛树脂的分解温度,探究不同改性方法对砂轮胎体机械性能和树脂显微结构的影响。结果表明:4种酚醛树脂的热分解温度分别为552、527、557、457℃;由于酚醛树脂改性方式不同,各砂轮胎体机械性能具有较大差异。3031树脂的硬度(HRB)最高,为64;3034树脂的硬度(HRB)最低,为41,仅为3031的64%。3031的抗弯强度最高,为87 MPa;3034的最低,为50 MPa,仅为3031的57.5%。

Four different modified phenolic resins(PFs)for resin bonded superhard wheel were selected to explore the performance of resin bond.The different matrices were prepared using the modified resins.The decomposition temperature,the mechanical performance and the micro structure were analyzed with the comprehensive thermal analyzer,universal testing machine,Rockwell hardness tester and ultra depth filed microscope.The results show that the thermal decomposition temperatures of different modified PFs are 552,527,557 and 457℃.It is also found that the maximum Rockwell hardness comes from Resin 3031,namely 64,while the minimum hardness is from Resin 3034,namely 41,only 64%of that of 3031,and that Resin 3031 has the largest bending strength,87 MPa,while Resin 3034 has the smallest bending strength,50 MPa,57.5%of that 3031.