High-hardenability medium-carbon MnCrMoB steel for transmission parts of engineering machinery and manufacturing method of high-hardenability medium-carbon MnCrMoB steel

• Main Authors: ZHANG XUDONG, YANG GAOCHENG, HUI SHIJIE, WU XIAOLIN, CAO HONGFU, XU XIAOHONG, BAI YUN
• Format: Patent
• Language: Chinese; English
• Published: 10.08.2021
• Subjects: ALLOYS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; METALLURGY OF IRON; PERFORMING OPERATIONS; POWDER METALLURGY; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to high-hardenability medium-carbon MnCrMoB steel for transmission parts of engineering machinery. The high-hardenability medium-carbon MnCrMoB steel for the transmission parts of engineering machinery is prepared from the following chemical components in percentage by weight: 0.30 to 0.38 percent of C, 0.10 to 0.35 percent of Si, 1.25 to 1.50 percent of Mn, 0.40 to 0.65 percent of Cr, 0.020 to 0.050 percent of Ti, 0.0015 to 0.0040 percent of B, 0.08 to 0.15 percent of Mo, less than or equal to 0.020 percent of S, less than or equal to 0.025 percent of P, less than or equal to 0.20 percent of Cu, less than or equal to 0.04 percent of Al, less than or equal to 0.0020 percent of O and the balance of Fe and inevitable impurities. According to the high-hardenability medium-carbon MnCrMoB steel for the transmission parts of engineering machinery, by adding a proper amount of B, the content of Cr and Mo of alloy is greatly reduced or the content of Ni is eliminated, the production cost is redu