Production of Full-Density M2 Automotive Diesel Parts Via the HTM ^TM Powder Metal Process

Three years of production experience have demonstrated the ability of HTM process full-density P/M cam rings of M2 high-speed steel for diesel fuel injection pumps to replace cam rings of the same alloy produced from rolled bar stock. The processing capabilities of HTM are outlined, the pertinent properties of the P/M material, the dimensional precision of the parts produced and the quality assurance program are described. Manufacturing experience in machining, heat treatment and grinding is discussed. Manufacturing cost reduction opportunities with the P/M part are shown. Results of bench and field testing of the P/M cam rings are discussed. Potential of the HTM full-density P/M approach for diesel and other applications is briefly reviewed.