Publication detail

The Effect of Water Jet Overlaps in a Descaler on the Quality of Surface of the Hot Rolled Steel

POHANKA, M. VOTAVOVÁ, H. RESL, O. KOTRBÁČEK, P.

Original Title

The Effect of Water Jet Overlaps in a Descaler on the Quality of Surface of the Hot Rolled Steel

Type

journal article in Web of Science

Language

English

Original Abstract

Hot rolling is a highly efficient steel processing method involving the heating and subsequent rolling of semi-finished cast products within mills; however, heating results in the formation of an undesirable, inhomogeneous oxide layer on the surface. Removal of this layer, known as scales, prior to rolling is essential to prevent scales from being rolled into the surface. The scales are removed in the descaler. Most descalers use multiple high-pressure hydraulic descaling nozzles with overlapping sprays. This setting can cause excessive cooling in the overlap area, uneven descaling of the surface, and the presence of residual scales. It can also result in uneven cooling at the finishing line. This study illustrates a typical nozzle configuration commonly used in industrial plants in the hydraulic descaling process and compares its results with a new configuration. The research focuses on examining the overlap area and the washout area of the sprays. The goal is to address the inhomogeneous descaling problem and propose procedures to prevent residual scales. It was shown that one of the problematic areas is the washout area, where the average thickness of the remaining scales was more than four times higher than other descaling areas. Reducing the offset angle has proven to be a good way to eliminate the washout area and achieve a homogeneous descaling process.

Keywords

hydraulic descaling; process optimization; water jet overlap; washout; scales

Authors

POHANKA, M.; VOTAVOVÁ, H.; RESL, O.; KOTRBÁČEK, P.

Released

10. 10. 2023

Publisher

MDPI

ISBN

2075-4701

Periodical

Metals

Year of study

13

Number

10

State

Swiss Confederation

Pages from

1

Pages to

13

Pages count

13

URL

https://www.mdpi.com/2075-4701/13/10/1722

Full text in the Digital Library

http://hdl.handle.net/11012/214427

BibTex

@article{BUT184842,
  author="Michal {Pohanka} and Helena {Votavová} and Ondřej {Resl} and Petr {Kotrbáček}",
  title="The Effect of Water Jet Overlaps in a Descaler on the Quality of Surface of the Hot Rolled Steel",
  journal="Metals",
  year="2023",
  volume="13",
  number="10",
  pages="1--13",
  doi="10.3390/met13101722",
  issn="2075-4701",
  url="https://www.mdpi.com/2075-4701/13/10/1722"
}