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我厂生产的建筑用打桩机上活塞毛坯 ,以QT5 0 0— 7材质代替锻钢 ,经加工装机使用发现其耐磨性、裂纹敏感性比锻钢件更优异 ,非正常停机明显减少 ,使用寿命有较大提高。其毛坯件生产工艺在特种厚大断面球墨铸铁件生产中有一定的代表性。
I plant the production of pile driver piston blank, instead of forged steel QT5 0 0-7 material, the use of processed installed capacity found that the wear resistance, crack sensitivity is better than the forged steel, abnormal stop significantly reduced service life Have greatly improved. The rough parts of the production process in the special thick section nodular cast iron production has a certain representation.