HEAT TREATMENT OF THE TRIP STEEL WITH PARTIAL SUBSTITUTION OF SILICON BY ALUMINIUM

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F17%3A43950033" target="_blank" >RIV/49777513:23210/17:43950033 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

HEAT TREATMENT OF THE TRIP STEEL WITH PARTIAL SUBSTITUTION OF SILICON BY ALUMINIUM

Popis výsledku v původním jazyce

Low alloyed high strength steel utilizing TRIP (transformation induced plasticity) effect achieve interesting combinations of relatively good strengths around 800 MPa and high elongation above 30%. This is the reason why these steels are developed mainly for an automotive industry. Good mechanical properties of TRIP steels are obtained due to the multiphase microstructure of these steels consisting of ferrite, carbide-free bainite and metastable retained austenite. This microstructure can be prepared by two step annealing with the second hold in temperature region of bainite transformation. This heat treatment was carried out in a laboratory furnace in this work using 0.2C-1.5Mn-0.6S-1.5Al steel. Heating temperatures of 770-950 °C were used with subsequent cooling in salt bath heated to 200 °C or 400 °C. After reaching the temperature of 425 °C, the samples were moved to the furnace and held at the temperature of 425° C. Final microstructures were characterised by scanning electron microscopy and mechanical properties were measured by tensile test. Resulting microstructures achieved the strengths of 750 – 908 MPa and total elongations of 33-42%.

Název v anglickém jazyce

HEAT TREATMENT OF THE TRIP STEEL WITH PARTIAL SUBSTITUTION OF SILICON BY ALUMINIUM

Popis výsledku anglicky

Low alloyed high strength steel utilizing TRIP (transformation induced plasticity) effect achieve interesting combinations of relatively good strengths around 800 MPa and high elongation above 30%. This is the reason why these steels are developed mainly for an automotive industry. Good mechanical properties of TRIP steels are obtained due to the multiphase microstructure of these steels consisting of ferrite, carbide-free bainite and metastable retained austenite. This microstructure can be prepared by two step annealing with the second hold in temperature region of bainite transformation. This heat treatment was carried out in a laboratory furnace in this work using 0.2C-1.5Mn-0.6S-1.5Al steel. Heating temperatures of 770-950 °C were used with subsequent cooling in salt bath heated to 200 °C or 400 °C. After reaching the temperature of 425 °C, the samples were moved to the furnace and held at the temperature of 425° C. Final microstructures were characterised by scanning electron microscopy and mechanical properties were measured by tensile test. Resulting microstructures achieved the strengths of 750 – 908 MPa and total elongations of 33-42%.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1502" target="_blank" >LO1502: Rozvoj Regionálního technologického institutu</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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