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This study investigated the effect of tempering temperature on the microstructure and mechanical properties of Cr14 ultra-high-strength steel. The steel was first normalized at 1223K for 1h, cold treated at 200K for 1h, and then tempered at five different temperatures between 723K and 833K for 4h. The microstructures of the Cr14 steel were characterized by X-ray diffraction, optical microscopy, field...
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