Vertical roll collar used for head of high speed heavy rail and manufacturing technique thereof

Abstract

The invention discloses a vertical roll collar used for the head of a high speed heavy rail and a manufacturing technique thereof. The technique comprises the following steps that step I, the chemicalcomponents of the vertical roll collar are determined: 2.55-2.95% of C, 0.50-1.0% of Si, 0.35-0.65% of Mn, 3.5-3.85% of Cr, more than or equal to 0.35% of Ni, 1.6-1.95% of Mo, 9.0-9.5% of V, more than or equal to 0.3% of Co, less than or equal to 0.030% of P, less than or equal to 0.025% of S, less than or equal to 0.03% of Al, more than or equal to 0.15% of Re and the balance of Fe and inevitable impurities; step II, centrifugal casting is performed, namely smelting is performed through an electric arc furnace, so that the chemical components of molten steel meet requirement; and before steel tapping, aluminum blocks and glass slags are used for deoxidation and anti-oxidation; step III, a blank is subjected to thermal unpacking at 450-550 DEG C; then the blank enters a thermal treatmentfurnace for annealing immediately; the blank is subjected to thermal treatment after coarse machining; and then the blank is inspected to obtain a qualified high-vanadium high-speed steel product. Thevertical roll collar is made of the high-vanadium high-speed steel, so that the abrasion resistance and heat-cracking resistance of a roll are improved.

Description

technical field [0001] The invention relates to a vertical roller ring for the head of a high-speed heavy rail and a preparation process thereof. Background technique [0002] In order to support the steady development of the national high-speed railway, there are four high-speed heavy rail production lines in China, namely Anshan Iron and Steel Company, Baowuhan Iron and Steel Company, Baotou Iron and Steel Company, and Panzhihua Iron and Steel Company. High-speed rail tracks to meet the country's high-speed rail development. The steel-based roll ring with ultra-high hardness and wear resistance is called the head vertical roll ring by high-speed heavy rail manufacturers. The rolling part of this vertical roll ring is located on the contact tread between the rail and the train, requiring high precision and deformation. Small size, good surface finish and so on. Domestic heavy rail manufacturers all use forged roller rings imported from Japan's Nissan, which is costly. C...

AI Technical Summary

Problems solved by technology

Domestic heavy rail manufacturers all use forged roller rings imported from Japan’s Nissan, and the cost is high