| 摘要 |
The present invention produces an Fe-based member having a high Young's modulus and a high toughness. In producing an Fe-based member, a first step and a second step are sequentially carried out. At the first step, an Fe-based material comprising1.5% by weight<=C<=2.5% by weight1.4% by weight<=Si<=3.5% by weight0.9% by weight<=Mn<=1.7% by weight0.5% by weight<=Ni<=1.5% by weight, andthe balance of Fe including inevitable impurities is subjected to a thermal treatment at a heating temperature set in a range of TS<T1<TL and under a quenching condition, wherein TS represents a solidus temperature of the Fe-based material, and TL represents a liquidus temperature. Then, at the second step, the resulting Fe-based material is subjected to a thermal treatment at a heating temperature T2 set in a range of Te1<T2<Te2 and for a heating time t set in a range of 90 min<=t<=180 min, wherein Te1 represents a eutectic transformation starting temperature, and Te2 represents a eutectic transformation finishing temperature.
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