Effect of Cooling velocity on Microstructure and Mechanical Properties

DOI

10.2991/ifeesd-16.2016.84How to use a DOI?

Keywords

SHCCT; phase transformation; cooling rate;

Abstract

The SHCCT diagram is a curve that can reflect the start point, the end of the phase transformation, which is significant in optimizing welding parameters and making a reasonable process parameters. In this paper, the weathering steel S355J2W at different cooling rate was employed to simulated the heating effecting zone. Microstructure was observed and hardness were tested to investigate effect of cooling rate on microstructure and hardness. The results showed that the austenite transformed into ferrite pearlite and bainite instead of ferrite and pearlite phases with the cooling rate increased from 0.05 /s to 100 /s. The pearlite phase disappeared completely when the the cooling rate was 2 /s. The microstructure was completely composed of bainite when the cooling rate was 3 /s. When the cooling rate reached 10 /s, martensite phases appeared which could be identified from the picture of the microstructure. The hardness increased with the increase of cooling rate due to different phase composition.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Zhiyi Zhang
AU  - Yongshou Wu
AU  - Chao Zhou
PY  - 2016/05
DA  - 2016/05
TI  - Effect of Cooling velocity on Microstructure and Mechanical Properties
BT  - Proceedings of the 2016 International Forum on Energy, Environment and Sustainable Development
PB  - Atlantis Press
SP  - 470
EP  - 474
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesd-16.2016.84
DO  - 10.2991/ifeesd-16.2016.84
ID  - Zhang2016/05
ER  -