本文介绍了甲阶酚醛树脂自硬砂工艺性能的部分研究结果。甲阶酚醛树脂自硬砂是酸硬化型的,用芳基酸的水溶液作硬化剂时,在低温条件下(低于10℃),自硬砂的硬化反应极为缓慢。北方工业公司研制了专用硬化剂,以加速低温下硬化,甲阶酚醛树脂自硬砂中,硬化剂加入量宜为树脂的50~60%。试验和生产表明,甲阶酚醛树脂自硬砂适用于所有的铸造合金,如有色合金、铸铁和铸钢,可用以制造任何尺寸的铸型和砂芯。 This paper introduces some of the results of the technical performance of the phenolic resin self-hardening sand. Resole phenolic resin from hard sand is acid sclerosing type, the use of aryl acid aqueous solution as a hardener, at low temperatures (less than 10 ℃), sclerosis hardening reaction is very slow. North Industrial Company developed a special hardener to accelerate the hardening at low temperature, phenolic resin from the hard sand, hardener should be added in an amount of 50 to 60% of the resin. Tests and production show that resols are suitable for all foundry alloys such as non-ferrous alloys, cast iron and cast steel for the production of molds and cores of any size.