Effect of Heat Imput on Microstructure and Toughness of High Strength Bridge Steel-Reference-Cited by-同舟云学术

Effect of Heat Imput on Microstructure and Toughness of High Strength Bridge Steel

Published:2011-02 Issue: Volume:194-196 Page:255-258
ISSN:1662-8985
Container-title:Advanced Materials Research
language:
Short-container-title:AMR

Author:

Jia Kun Ning¹

Affiliation:

1. Changchun Institute of Technology

Abstract

The coarse grain heat affected zone(CGHAZ) at different parameters t8/5 of high-strength bridge steel Q460q were simulated with thermal simulation machine. the microstructure of CGHAZ and the effect of granular bainite on the toughness were analyzed in this paper.The results show that: When t8/5<60s, lath bainite and granular bainite intertwine, and the quantity of strip M-A constituents in granular bainite decreased, so toughness is higher.When t8/5>60s, the quantity of eutectoid ferrite and granular bainite increased, coarse M-A constituent resulting in the grain size of effective crack propagation becoming coarser and toughness decreased significantly.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Link

https://www.scientific.net/AMR.194-196.255.pdf

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