【摘要】 介绍了用金属型并采取一系列工艺措施生产断面尺寸大于450mm×450mm的超大断面型材,达到了技术条件的要求。更多还原

【Abstract】 The permanent mould was used and a series of meas ur es was adopted to produce super-heavy ductile iron sections bigger than450× 450mm.As a result,the technical requirements were reached.更多还原