Influence of Annealing Temperature and Time on the Mechanical Properties of Selected Steels for Heavy Forgings

Two types of steels used for production of heavy forgings were selected for the experimental evaluation of the effect of long time dwell at elevated temperatures and cooling during heat treatment on their mechanical properties in order avoid the possibility of grain boundary embrittlement. Samples f...

Full description

Saved in:
Bibliographic Details
Published in:Key engineering materials 2015-05, Vol.647, p.38-46
Main Authors: Horník, Jakub, Jandoš, František, Kasl, Josef, Málek, Jaroslav, Zuna, Petr, Jetmar, Tomáš, Matějová, Miroslava
Format: Article
Language:English
Subjects:
Annealing
Cooling effects
Embrittlement
Forgings
Grain boundaries
Iron and steel making
Mechanical properties
Steels
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two types of steels used for production of heavy forgings were selected for the experimental evaluation of the effect of long time dwell at elevated temperatures and cooling during heat treatment on their mechanical properties in order avoid the possibility of grain boundary embrittlement. Samples from evaluated steels 26NiCrMoV14-5 and 22CrNiMoWV8-8 were austenitized for 2 hours at temperature of 1200°C and oil quenched. Subsequently the annealing at temperatures (200 - 700)°C for 1 hour and 100 hours was applied. Selected mechanical properties, especially hardness and impact energy, were monitored. It was found that for steels 26NiCrMoV14‑5 and 22CrMoNiWV8-8 exist the temperature intervals (300 - 400)°C and (500 ‑ 600)°C respectively with the possible potential for toughness decreasing.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.647.38