ON THE POSSIBILITY OF PRODUCING PISTON PINS FOR DIESEL-ENGINES FROM STEEL 18KHGT WITH THE USE OF MECHANICAL AND CHEMICAL HEAT-TREATMENT

At the present time piston pins of highly loaded diesel engines are pr oduced by mechanical treatment from tube preforms of steel 12KhN3A and carburized by subsequent heat treatment. The high cost of domestic st eel and the absence of preforms of the requisite size make it necessar y to choose a less scarce material and develop a treatment process tha t would provide the requisite operational characteristics of the parts . The present work is devoted to a study of the possibility of using f or the purpose steel 18KhGT in a state of substructural toughening cre ated by cold plastic straining (CPS) and a stabilizing heat treatment with subsequent ion nitriding.