PURPOSE: To obtain parts combining high toughness with wear resistance by subjecting a steel with a specific composition to the prescribed carburizing treatment by an ion carburizing method and then to quench-and-temper treatment.
CONSTITUTION: A steel having a composition consisting of 0.3W0.7% C, ≤1.5% Si, ≤2.0% Mn, 3W15% Cr, ≤5.0% Mo, further ≤2.0% V and/or ≤3.0% W, and the balance Fe with inevitable impurities is refined. This steel is carburized by an ion carburizing method so that the area ratio of carbide in the cross section within 0.1mm from the surface is regulated to ≥10% and is then subjected to quench-and-temper treatment under the ordinary conditions, by which the parts combining high toughness with wear resistance can be prepared. Further, it is desirable that the above parts are tools for cold working.
| JP3202300 | ROTARY TYPE FLUID COMPRESSOR |
| JP4408698 | Member made of steel |
KIMURA TOSHIMITSU
IIKUBO TOMOHITO
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