| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.29 ( November 1993 ) Special Issue on Iron Power ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Characteristics of Chromium-Containing Alloyed Steel Powders with High Wear Resistance Kuniaki Ogura, Osamu Furukimi, Koji Yano, Toshiyuki Minegishi, |
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Synopsis : Alloyed steel powders containing Cr have been developed for the production on heavy-duty structural parts with high wear resistance. KIP 4100V is a low-oxygen pre-alloyed powder containing 1%Cr-0.7%Mn-0.3%Mo, and provides high compressibility. Produced by a water-atomizing and vacuum-annealing process, KIP 4100V attains a tensile strength of more than 1 100 MPa after carbonizing. Composite-type Cr-containing alloyed steel powder, which contains 1% pre-alloyed Cr and 1% composite-type alloyed Mo to improve the compressibility of Cr-containing powders, attains a compressibility of 7.18 MPa when pressed at 686 MPa, and a higher tensile strength than that of KIP 4100V after bright-quenching at 1 420 MPa. Its wear resistance is comparable to that of KIP 4100V, and is more than one hundred times greater than that of Ni-containing composite-type alloyed steel powder. The sintering shrinkage of the composite-type Cr-containing alloyed steel powder is suppressed due to transient liquid-phase sintering and the dimensional change during sintering is very small. |
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