Universal type steel ball unthreaded ball iron roller ring and manufacturing method thereof

Abstract

The invention discloses a universal type steel ball unthreaded ball iron roller ring which comprises an outer layer and an inner core. The proportion between the outer layer and the inner core is 2:1. The alloy component of the outer layer comprises, by weight, 3.0-3.5% of C, 1.2-2.0% of Si, 0.5-1.2% of Mn, 0.1% or less of P, 0.02% or less of S, 0.2-1.0% of Cr, 0.5-1.5% of Ni, 0.2-1.0% of Mo, and the balance Fe and inevitable impurities. The alloy component of the inner core comprises, by weight, 1.0-1.5% of C, 1.3-1.7% of Si, 0.5-1.0% of Mn, 0.08% or less of P, 0.03% or less of S, 0.5% or less of Cr, 0.3% or less of Ni, 0.13% or less of Mo, and the balance Fe and inevitable impurities. A manufacturing method comprises the steps of A, smelting, B, inoculation and spheroidizing, and C, casting. By means of the universal type steel ball unthreaded ball iron roller ring and the manufacturing method thereof, the hardness fall of rollers can become small, the steel adhesion tendency is relieved, and the comprehensive using performance of the roller ring is improved.

Description

technical field [0001] The invention relates to a roller ring and a manufacturing method thereof, in particular to a universal steel pearlitic nodular iron roller ring and a manufacturing method thereof. Background technique [0002] Universal steel vertical roll rings of large and medium-sized steel rolling mills are generally made of high-carbon semi-steel. High-carbon semi-steel rolls have strong wear resistance and accident impact resistance, but their thermal crack resistance is slightly poor, and cracks are prone to occur during use. In addition, some section steel manufacturers use semi-steel rolls for rolling. It has a great impact on the normal rolling and production organization of section steel mills. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a universal steel pearlitic nodular iron roll ring and its manufacturing method, so that the hardness drop of the roll is small, the tendency of sticking s...

AI Technical Summary

Problems solved by technology

High-carbon semi-steel rolls have strong wear resistance and accident impact resistance, but their thermal crack resistance is slightly poor, and cracks are prone to occur during use. In addition, some section steel manufacturers use semi-steel rolls for rolling. It has a great impact on the normal rolling and production organization of section steel mills

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