Antimony-magnesium-calcium composite treated cutting tool steel and preparation method thereof

• Main Authors: JIANG YUNAN, HAN YU, GONG ZHEN, WANG QUANZHOU, LIU ZHIPU, CUI HONGTAO, WANG YADONG, WU GANG, ZUO YUANHONG
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses cutting tool steel subjected to antimony-magnesium-calcium composite treatment and a preparation method thereof, and belongs to the technical field of steel smelting. The invention relates to cutting tool steel subjected to antimony, magnesium and calcium composite treatment, which comprises the following components in percentage by mass: 0.60 to 0.68 percent of C, 0.10 to 0.30 percent of Si, 1.0 to 1.20 percent of Mn, 0.005 to 0.015 percent of P, 0.30 to 0.50 percent of S, 0.08 to 0.10 percent of Ca, 0.05 to 0.08 percent of Mg, 0.10 to 0.15 percent of Sb, 0.50 to 0.80 percent of Cu, 0.50 to 0.80 percent of Cr and the balance of Fe and inevitable impurity elements, and is prepared by the working procedures of top-bottom combined blown converter smelting, LF refining, continuous casting, heating, rolling, controlled cooling, coiling and the like. By means of composite wrapping formed by manganese antimonide, manganese sulfide and antimony pentoxide, the problems that the fatigue perform