Alloyed Steel Powder for Sintered Compacts with Excellent Machinability

摘要

The sintered compacts made from KIP SIGMALOY 2010 (2 percent Ni-1 percent Mo partially alloyed steel powder) attain superior machinability in drilling and turning to those made from KIP SIGMALOY 415S (4 percent Ni-1.5 percent Cu-0.5 percent Mo partially alloyed steel powder). The excellent machinability is attributed to the lower hardness and the reduction of Ni-rich tough austenite of the sintered compact made from KIP SIGMALOY 2010. After case-hardening the same sintered compacts made from KIP SIGMALOY 2010 attain higher hardness and radial crushing strength than those made from KIP SIGMALOY 415S due to strain induced martensitic transformation of austenite.