A nodular cast iron edging roll suitable for universal rolling mill and its manufacturing method

Abstract

The invention discloses a nodular cast iron edging roll suitable for a universal rolling mill. According to the weight ratio, the mass percentages of the elements of the nodular cast iron edging roll suitable for a universal rolling mill are as follows: carbon 3.2-3.6%, silicon 1.8% ~2.4%, manganese 0.5~1.2%, magnesium 0.08~0.12%, copper 0.2~0.6%, nickel 0.2~0.4%, cerium 0.03~0.04%, yttrium 0.08~0.1%, molybdenum 0.01~0.02%, chromium 0.04~0.1% %, titanium 0.004-0.006%, vanadium 0.02-0.03%, phosphorus ≤ 0.05%, sulfur ≤ 0.025%, and the balance is iron. The invention also provides a method for manufacturing a nodular cast iron edge roll suitable for a universal rolling mill. The edge rolling roll of the present invention can be pressed under high temperature for a long time without cracking, and has excellent wear resistance, extrusion toughness, and thermal fatigue resistance, which not only improves the working time of the machine, but also prolongs the use of the edge rolling roll The manufacturing method of the present invention can reasonably set the heating temperature, holding time, cooling rate and method, effectively improve the strength and temperature resistance of the nodular cast iron, and the preparation method is simple and efficient.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a nodular cast iron edging roll suitable for a universal rolling mill, and at the same time, the invention also relates to a manufacturing method of a nodular cast iron edging roll suitable for a universal rolling mill. Background technique [0002] The universal rolling mill is composed of a pair of horizontal rolls and a pair of vertical rolls to form the main frame. The axes of the four rolls are in the same plane. Four-sided processing can be carried out on the rolled piece, and a two-roll horizontal rolling mill is used as an auxiliary stand (edging machine). [0003] The universal rolling mill is mainly used to roll various types of steel, such as: H-beam, rail, I-beam, channel steel, steel sheet pile, U-beam, L-beam, unequal angle steel and other types of steel, because it is suitable for many Variety of steel rolling, hence the name "universal rolling mill". [0004] T...

AI Technical Summary

Problems solved by technology

[0004] The edge roll is an important part of the universal rolling mill. Due to the unreasonable formula and process of the existing nodular cast iron edge roll, it is easy to produce fatigue cracks, and it is easy to be affected by heat, twisting pressure and stress, and destroy the matrix of the edge roll itself. organization, the factors of thermal fatigue cracks are very high, which affects its service life