Guide and guard roller for guiding steel billet in high speed wire rolling machine and its making process

Abstract

The present invention discloses one kind of guide and guard roller for guiding steel billet in high speed wire rolling machine and its making process. Chemically, the guide and guard roller has material comprising C 0.7-1.4 wt%, Wt% 7.0-10.0 wt%, V 0.8-1.5 wt%, Cr,5.0-10.0 wt%, B 1.2-2.5 wt%, Mo<1.5 wt%, Si<1.5 wt%, Mn<1.5 wt%, RE 0.08-0.18 wt%, Mg 0.05-0.15 wt%, Ti 0.08-0.20 wt%, S<0.05 wt%, and P<0.05 wt%, except Fe and inevitable impurity. The guide and guard roller is made through electric furnace smelting and precise wax mold casting or evanescent mold casting. It has high strength, high toughness, high wear resistance, high fatigue and oxidation resistance, high quick cooling and heating resistance, and use performance obviously higher than that of high Ni-Cr cast steel guide and guard roller.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and relates to a guide roller and a preparation method thereof, in particular to a guide roller for introducing billets into various high-speed wire rolling mills and a preparation method thereof. Background technique [0002] For continuous bar and wire rolling mills, rolling guide devices are mostly used at the entrance and exit of intermediate and finishing mills. Due to the harsh operating environment, guide rollers have become the main vulnerable parts. In addition, since modern high-speed rolling mills have high requirements on the dimensional accuracy of the guide rollers, the consumption of the guide rollers is large. In high-line production, the rolling speed is generally above 50m / s, and the rotation speed of imported guide rollers is as high as 260r / s or above. During rolling, the guide rollers have to withstand high temperature (about 1000°C), sliding a...

AI Technical Summary

Problems solved by technology

However, the preparation process of the ceramic guide roller is complicated, and the material is brittle, and the thermal fatigue performance is poor. During the hot rolling process, it is easy to be brittle and peeled off.