Mixed powder metallurgy process
AssigneeNissan Motor Co., Ltd.
InventorsAkira Fujiki, Toshiaki Aoki, Kazuhiro Marumoto, Masaki Yoshida, Hiroyuki Tanaka
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Abstract
A mixed powder for powder metallurgy process, comprises prealloy type steel mother powder containing alloy components in a range of 1.5 to 4, alloyed micro powder and Ni powder. A preparation method of iron base sintered compact by blending this mixed powder with graphite powder, compressed powder molding the same and sintering at 1050 to 1250° C., and an iron base sintered compact of high tensile strength and fatigue strength obtained by this preparation method.
Claims18
A mixed powder for powder metallurgy process, comprising:
- prealloy type steel mother powder containing alloy components in a range of 1.5 to 4.5 wt %;
- alloyed micro powder;
- and
- Ni powder.
A mixed powder for powder metallurgy process, comprising:
- prealloy type steel mother powder containing alloy components in a range of 1.5 to 4.5 wt %, the prealloy type steel powder presents the sectional circular coefficient (Cc) represented by the following expression (1) less than or equal to 0.56:
- Cc=4π×S/L2 (1)
- where, S is sectional area and L is peripheral length;
- and alloyed micro powder.
Dependencies are inferred from the claim text.