... treatment:anneal, quenching, normalizing, carburizing,polishing, platingMachiningCNC and NC machining, turning, milling, drilling, boring, threading, grinding machines and ... GrindingGrind the ingate and defected surface with grinding wheel. Heat treatmentHeat treat the casting by nomalizing, annealing, quench+tempering, induction ... or iron case for transportation. silica sol casting steel flange