High-hardness high-wear-resistance large-size forged ball for semi-autogenous mill and manufacturing method

• Main Author: HUANG GUANFU
• Format: Patent
• Language: Chinese; English
• Published: 07.11.2023
• Subjects: ALLOYS; CHEMISTRY; COMBINED OPERATIONS; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; OTHER WORKING OF METAL; PERFORMING OPERATIONS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; UNIVERSAL MACHINE TOOLS

The high-hardness high-wear-resistance large-size forging ball for the semi-autogenous mill comprises the following components in percentage by mass: 0.10 to 0.12 percent of aluminum, 0.025 to 0.032 percent of ferroboron, 0.30 to 0.40 percent of ferrotitanium, 0.25 to 0.30 percent of silicon-calcium-barium alloy, 0.45 to 0.50 percent of rare earth silicon-iron-magnesium alloy, 0.97 to 1.06 percent of carbon, 0.82 to 0.94 percent of chromium, 0.84 to 0.98 percent of silicon, 3.25 to 3.46 percent of manganese, 0.031 to 0.057 percent of niobium and the balance of iron and inevitable impurities. 0.052 to 0.088 percent of nitrogen, and sullt; 0.030% by weight of phosphorus; 0.035%, and the balance being Fe and inevitable impurities. The components of the large-size wear-resistant steel ball for the large semi-autogenous mill are designed, the adding amount of precious metal elements is reduced, and the production process of the large-size wear-resistant steel ball is adjusted, so that the production cost is reduce