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一、概述在铸造生产中,由于石英水玻璃砂具有料源广泛、价格低廉、造型容易、硬化速度快、尺寸精度高等优点,而被广泛地用于铸钢生产。但是,水玻璃砂也有其缺点,例如:浇注后型砂的残留强度高,清砂困难。为解决这一难题,满足铸钢生产的需要,我国铸造工作者曾于1965年创造了“水爆清砂”工艺。该工艺具有清砂简便、效率高,并有很好的防尘效果,二十多年来在我国铸造生产中起过重大作用。但采用该工艺时,不仅铸件的入水温度高,而且温度范围窄,一旦控制不当,铸件就有出现裂纹的危险。为了完善这种工艺,多年来,我国
First, an overview In the casting production, due to quartz glass with a wide range of sources of material, low prices, easy modeling, hardening speed, dimensional accuracy and other advantages, which are widely used in steel production. However, sodium silicate sand also has its drawbacks, such as the high residual strength of sand after pouring and the difficulty of sand removal. To solve this problem, to meet the needs of steel production, casting workers in our country in 1965 had created a “water burst sand” process. The process has the advantages of simple sand cleaning, high efficiency and good dustproof effect. It has played an important role in casting production in our country for more than 20 years. However, when this process is used, not only the temperature of the casting water is high, but also the temperature range is narrow. Once the casting is improperly controlled, there is a danger that the casting may crack. In order to improve this process, over the years, China