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本文介绍了作者在树脂砂韧度研究中所取得的成果。运用Instron仪和自制的高温性能试验仪对酚尿烷树脂自硬砂,酚醛树脂覆膜砂以及呋喃树脂自硬砂等的常温韧度,热态韧度(约200℃)和高温韧度(约1300℃)进行了测定。对粘结剂和催化剂(或固化剂)的种类、加入量、固化时间、固化温度等诸因素对树脂砂韧度的影响规律进行了探讨,并建议将树脂砂的韧度作为树脂砂断裂的新判据列入树脂砂性能检测的标准
This article describes the author’s research results in the resin sand toughness. Using Instron instrument and self-made high temperature performance tester, the room temperature toughness, hot toughness (about 200 ℃) and high temperature toughness (about 200 ℃) of phenol urethane resin self-hardening sand, phenolic resin coated sand and furan resin self- About 1300 ° C). The effects of various factors such as the kind of binder and catalyst (or curing agent), addition amount, curing time and curing temperature on the toughness of resin sand were discussed, and the toughness of resin sand was suggested as the fracture of resin sand The new criteria included in the performance test of resin sand standards