1500MPa heat-treatment-free low-cost troostite cutting tool steel and production method thereof

• Main Authors: YANG YU, SUN AO, LI QINGXIAN, LIU ZHIWEI, ZHANG RUIQI, WANG YINGHAI, ZHAO BAOCHUN
• Format: Patent
• Language: Chinese; English
• Published: 26.10.2021
• Subjects: ALLOYS; APPARATUS THEREFOR; CHEMISTRY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; 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; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides 1500MPa heat-treatment-free low-cost troostite cutting tool steel and a production method thereof. The steel comprises the following chemical components in percentage by weight: 0.60-0.9% of C, less than or equal to 0.1% of Si, 0.4-1.5% of Mn, 0.0005-0.05% of Ca, 0.0005-0.05% of Mg, 0.001-0.5% of Re, greater than or equal to 0.01% of Sn, greater than or equal to 1 of Ca/Mg, greater than or equal to 0.05 of Ca/Re, greater than or equal to 0.5 of Ca/S, greater than or equal to 0.005% of N, less than or equal to 100 of C/N, less than or equal to 0.0008% of B, less than or equal to 0.020% of P, less than or equal to 0.015% of S and the balance Fe and inevitable impurities. The tool steel produced by the production method provided by the invention does not need heat treatment, has hardness of 42HRC or above, is excellent in wear resistance and low in cost, has a smooth surface, is free of an oxidized decarburized layer, has a remarkably prolonged service life, and meets the environmental pro