The Cr12 steel is a kind of Ledeburite steel. Although eutectic carbides are smashed by forging,they are still coarse with ridgy which lead to toughness insufficient and not enough service life of the tool.

• 由于Cr12属莱氏体钢,共晶碳化物虽经锻碎,但仍粗大且有棱角,致使凸模强韧性不足,寿命不高。