Preparation method of high-chromium grinding ball

• Main Authors: DAI JING, GUI JINSONG, FANG JIANFENG, CHEN QIAN, CHEN QUANXIN, CHENG QI, HUANG YONG
• Format: Patent
• Language: Chinese; English
• Published: 23.02.2024
• Subjects: ALLOYS; CASTING; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; FOUNDRY MOULDING; 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; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a preparation method of a high-chromium grinding ball, which comprises the following steps: S1, taking alloy liquid, casting the alloy liquid into a casting ladle in which nano TiC is uniformly distributed, and forming to obtain an intermediate grinding ball; s2, carrying out austenitizing treatment on the intermediate grinding ball, and then quenching; and S3, taking the quenched middle grinding ball, carrying out tempering treatment, and then carrying out air cooling to room temperature to obtain the high-chromium grinding ball. Wherein the alloy liquid comprises the following raw materials in parts by weight: 18%-20% of Cr, 3.0%-3.5% of C, 0.9%-1.1% of Si, 0.9%-1.0% of Mn, 1.6%-1.8% of Mo, 0.8%-1.0% of B, 1.2%-1.3% of Ni and the balance of Fe. By selecting a proper formula and combining a proper heat treatment process, the high-chromium grinding ball has good wear resistance and good toughness, and the problems that an existing high-chromium grinding ball is prone to breaking and ou