Improvement of Casting Process for Large Iron Flywheel
Aiming at question of internal shrinkage and coarse microstructure at the riser neck flange in the large flywheel iron castings that the finished product rate is 65%,process was improved.The riser was cancelled.Using ring runner with high trapezoidal cross section and a plurality of flat trapezoidal cross section,castings feeding and automatic feeding were achieved for flywheel.A series of effective measures including using cold iron and packet inoculation and so on can effectively solve shrinkage hole and the local grain coarsening in thick-wall large iron castings.The produced castings can meet the performance requirements,and the rate of finished products can be improved to100%.