GVTi wear-resistant type semisteel roller and preparation method thereof

Abstract

The invention discloses a GVTi wear-resistant type semisteel roller. The GVTi wear-resistant type semisteel roller comprises the following components of, in percentage by mass, 1.60-2.00 parts of C, 0.80-1.60 parts of Si, 0.60-1.20 parts of Mn, 1.20-3.00 parts of Ni, 0.80-2.00 parts of Cr, 0.50-1.00 part of Mo, 0.10-0.60 parts of V, 0.10-0.30 parts of Ti, less than or equal to 0.03 parts of S, less than or equal to 0.03 parts of P, 0.05-0.10 parts of AL, 0.10-0.30 parts of CaSi, and the balance Fe and inevitable impurities. The invention also discloses a preparation method of the GVTI wear-resistant semisteel roller. According to the GVTi wear-resistant type semisteel roller and the preparation method thereof, through silicon/carbon ratio, the heat crack resistance of the roller is improved, the strength of the roller is further improved, and the tensile strength of the roller is more than or equal to 650 Mpa; the reasonable proportion of nickel, chromium, molybdenum, vanadium and titanium alloy is added, especially the vanadium and titanium alloy is added, so that the overall casting performance is further optimized, the good hardness from inside to outside can be ensured, the hardness of the roller reaches 55/70HSD, and the wear resistance of the final product of the roller can be improved by 20%-30%.

Description

technical field [0001] The invention belongs to the field of high-speed steel casting, and in particular relates to a GVTi wear-resistant semi-steel roll and a preparation method thereof. Background technique [0002] With the high-quality development of the iron and steel industry, major steel mills pay more attention to energy saving and consumption reduction, especially the semi-steel rolls often used in the primary and secondary rolling mills involved in H-beams and rods and wires. The material has not been obtained for a long time Good breakthrough, low wear resistance of the roll (hardness is generally 40~55HSD), poor thermal crack resistance (hardness difference between the roll surface and the bottom of the pass is generally ≥5HSD), short service life, etc., due to the influence of the roll change cycle It may form a deep crack and cause the roll to break and so on. Contents of the invention [0003] Purpose of the invention: The purpose of the invention is to pro...

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Problems solved by technology

[0002] With the high-quality development of the iron and steel industry, major steel mills pay more attention to energy saving and consumption reduction, especially the semi-steel rolls often used in the primary and secondary rolling mills involved in H-beams and rods and wires. The material has not been obtained for a long time