Effect Of Zr Addition On Mechanical Properties Of Cr-Mo Plastic Mold Steels

Hyun-Ho Kim, Seok-Jae Lee & Oh-Yeon Lee
We investigated the effects of the additions of Zr and other alloying elements on the mechanical properties and microstructure in Cr-Mo plastic mold steels. The addition of alloying elements changed the microstructure of the normalized samples from the upper bainite to lower bainite due to the increased hardenability. The tempering temperature influenced the strength and hardness values, especially the phenomenon of 350oC embrittlement was observed. The alloy additions of Cr, Mo, and V improved the...
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