Experimental Research on En-block Piston Ring Produced by Shell Core Process

The 240 en-block piston rings were produced by self-designed shell core in practical plant conditions,and the microstructure and properties of the piston rings were compare with that produced by green-sand.The results show that the technical parameters of the piston rings produced by shell core process can meet the technical criterion of the piston ring completely.The hardness of the piston rings produced by the two processes is almost equivalent,while the complex properties of the piston rings produced by shell core process are better in metallurgical microstructure,bending strength and abrasion resistance etc.