Application of Quantitative Calculation Method of Riser Modulus in Process Design for Steel Castings
Author of the article:HE Zhenmei;LI Qingqing;LI Xiaodong
Author's Workplace：Hebei Province High Strength Wear Resistant Steel Technology Innovation Center,Zhangjiakou 075132,China;Hebei North Casting Industry Co.,Ltd.,Zhangjiakou 075132,China
Key Words：riser modulus quantitative calculation minimum safety height surplus volume ratio of molten steel
Abstract：
The quantitative calculation method of casting steel riser modulus was a new method for casting steel riser design.Based on the modulus of casting and riser,the formula for calculating the minimum safe height of riser,formula for calculating the liquid phase to radius of riser surplus steel,formula for calculating the liquid phase to height of riser surplus steel and formula for calculating the liquid product ratio of riser surplus steel were derived.These four formulas can be used to design the minimum safe height of casting riser and reasonable volume ratio of surplus molten steel in casting riser after solidification.The calculation value of the minimum safe height of riser was close to the MAGMA simulation result.The results show that the riser castings designed by this method have no shrinkage cavity defects and the quality of the steel castings is guaranteed.Compared with the traditional empirical formula for casting riser,the quantitative calculation method for casting riser modulus reduces the requirement for casting technician’s design experience and is widely used in casting process development,which improves the quality and efficiency of casting process development.
