MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Superhigh Strength Metal Injection Molded Low Alloy Steels by In-Process Microstructural Control
Hideshi MiuraMitsuhiro Matsuda
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2002 Volume 43 Issue 3 Pages 343-347

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Abstract

Metal Injection molding (MIM) process is an advanced powder processing technique because of net shaping with shape complexity at low processing energy and 100% material utilization. This study has been performed to clarify and to optimize the relationship between the mechanical properties and the microstructures for the superhigh strengthening sintered low alloy steels (Fe–Ni system) by using MIM process. A 6 mass%Ni MIM steel showed excellent properties of 2000 MPa tensile strength, 5% elongation and 500 MPa fatigue strength. Instead of Fe–Ni, moreover, the Fe–Mn low alloy steel was investigated to obtain high performance properties, because Ni has a harmful influence upon the human body, for example, a Ni allergy.

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© 2002 The Japan Institute of Metals and Materials
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