A COLD-WORK TOOL STEEL WITH EXCELLENT HARDNESS AND IMPACT TOUGHNESS

摘要

The present invention relates to a cold work tool steel including 1.00-1.20 wt% of carbon (C), 0.5-0.7 wt% of silicon (Si), 0.3-2.0 wt% of aluminum (Al), less than or equal to 0.5 wt% of manganese (Mn), 8.5-9.5 wt% of chrome (Cr), 0.8-1.3 wt% of [Mo]+0.5[W], and the remainder consisting of iron (Fe) and inevitable impurities. The cold work tool steel can ensure sufficient hardness and provide improved toughness.