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为使焊接型辙叉趾跟端150 mm范围全断面内部质量等级均为Ⅰ~Ⅱ级,采用发热冒口、加强激冷和转移缺陷等工艺措施,实践生产证明,质量达到设计要求。
In order to make the internal quality grade of the full cross-section of the frog toe-toe-end 150 mm range from Ⅰ to Ⅱ, the heat riser was used to strengthen the process measures such as chilling and transfer defects, and the practice production proved that the quality met the design requirements.