TY - JOUR
T1 - Ultrahigh strength ferrous sintered components
AU - Furukimi, Osamu
AU - Yano, Koji
AU - Takajo, Shigeaki
N1 - Copyright:
Copyright 2004 Elsevier B.V., All rights reserved.
PY - 1991/10
Y1 - 1991/10
N2 - Compacts made from a newly developed composite-type alloy steel powder with 2%Ni and 1%Mo show superior mechanical properties after heat treatment. The case-hardened compacts exhibit a tensile strength of 1500MPa, absorbed energy of 21J, rotating bend fatigue strength of 460MPa and a compact fatigue strength of 2530MPa. The levels exceed the corresponding values for compacts made from a conventional 4%Ni-0.5%Mo-1.5%Cu steel powder, which are 1380 MPa, K 20J, 410MPa and 2430MPa, respectively. Double-pressed, double-sintered, bright-quenched and tempered compacts made from the new powder posses ultrahigh tensile strength of 1920MPa with high absorbed energy of 35J. The extraodrinary strengthening is attributed to the strain-induced transformation of Ni-rich austenite to martensite. In the sintered and heat-treated compacts made from the new powder, the austenite transforms almost completely to martensite under stress.
AB - Compacts made from a newly developed composite-type alloy steel powder with 2%Ni and 1%Mo show superior mechanical properties after heat treatment. The case-hardened compacts exhibit a tensile strength of 1500MPa, absorbed energy of 21J, rotating bend fatigue strength of 460MPa and a compact fatigue strength of 2530MPa. The levels exceed the corresponding values for compacts made from a conventional 4%Ni-0.5%Mo-1.5%Cu steel powder, which are 1380 MPa, K 20J, 410MPa and 2430MPa, respectively. Double-pressed, double-sintered, bright-quenched and tempered compacts made from the new powder posses ultrahigh tensile strength of 1920MPa with high absorbed energy of 35J. The extraodrinary strengthening is attributed to the strain-induced transformation of Ni-rich austenite to martensite. In the sintered and heat-treated compacts made from the new powder, the austenite transforms almost completely to martensite under stress.
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M3 - Article
AN - SCOPUS:0026239087
VL - 27
JO - International Journal of Powder Metallurgy (Princeton, New Jersey)
JF - International Journal of Powder Metallurgy (Princeton, New Jersey)
SN - 0888-7462
IS - 4
ER -