This research mainly explores the production of steel castings with air flush molding green sand and the improvement of its character from the molding sand recipe and mold sand system control.

本研究主要探讨了用气冲造型湿型砂来生产铁路钩缓铸钢件，从型砂的配方和型砂系统的控制等几个方面来优化其性能。

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When low alloy steel replaced carbon steel castings, a series of questions were uncovered in traditional sand casting process.

铸钢材质升级为低合金钢后，传统的砂型铸造工艺在生产中暴露出了一系列问题。

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A difficult foundry problem about the cast shaping of the small and deep holes in the heavy section steel castings can be solved by using the no bake sand. for making cores.

用这种型砂制作型芯，可解决厚大铸钢件内不易铸出的小径深孔腔室的成形难题。

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