Experimental study of in-line heat treatment of 1.0577 structural steel

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F18%3APU129739" target="_blank" >RIV/00216305:26210/18:PU129739 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2351978918310011" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2351978918310011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.promfg.2018.07.305" target="_blank" >10.1016/j.promfg.2018.07.305</a>

Result language

angličtina

Original language name

Experimental study of in-line heat treatment of 1.0577 structural steel

Original language description

In-line heat treatment is frequently used in rolling mills because it offers a significant improvement of rolled product mechanical properties with costs benefits. This method allows achieving required mechanical properties without necessity of additional alloying and rolled product reheating. Disadvantage of in-line heat treatment is fixed rolling velocity which is typically strong parameter in controlling of final cooling regime. Water flow rate, pressure, type, size and position of nozzles, water temperature are examples of parameters influencing cooling intensity and the Leidenfrost temperature. Laboratory experimental study is needed to design well controllable cooling system which allows keeping required cooling regimes for various product steel grades and dimensions. This paper describes experimental stages of cooling system designing procedure for improving structural steel 1.0577 mechanical properties. First experimental part began with building of cooling intensities (heat transfer coefficients - HTC) database for tested several nozzles configurations. Then required cooling regime was selected according to the continuous cooling transformation diagram. The target was obtaining harder (quenched) material with good ratio between elongation and strength. The final equalization temperature was set to 600 °C in the whole body. Numerical simulations of cooling followed based on the knowledge of heat transfer coefficients from database. Appropriate nozzle configuration was chosen and numerical results were experimentally validated using modified Jomminy test. A hardness was improved significantly up to thickness of 12 mm (275 HV under sprayed surface decreasing to 180 HV in 12 mm). When the required material structure and hardness verified appropriateness of cooling regime by previous tests, the first design of cooling section was done. Full scale sample was heat treated on a new experimental stand (Karusel) which was developed by HeatLab. It enabled to simulate

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/LO1202" target="_blank" >LO1202: NETME CENTRE PLUS</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

17th International Conference on Metal Forming (METAL FORMING 2018)

ISBN

9781510869561

ISSN

2351-9789

e-ISSN

—

Number of pages

8

Pages from-to

1696-1603

Publisher name

Elsevier

Place of publication

neuveden

Event location

Toyohashi

Event date

Sep 16, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000547828500208