... grained high-quality hot alloy steel,4Cr5MoSiV,high hardenability, high toughness, and fine-grained. Fine-grained high-quality hot alloy steel,4Cr5MoSiV,high hardenability, high ... composition designhigh hardenability, high toughness, and fine-grained.The use of Electric arc furnace (EAF+ refiningLF+ ... temperature, small heat deformation, and in air-quenching , the tendency of the appearing ...