On the role of Cu addition in toughness improvement of coarse grained heat affected zone in a low carbon high strength steel

2020 ◽  
Vol 55 (24) ◽  
pp. 10863-10877
Author(s):  
Xiaohui Xi ◽  
Jinliang Wang ◽  
Liqing Chen ◽  
Zhaodong Wang
Keyword(s):  
Heat Affected Zone ◽  
High Strength Steel ◽  
High Strength ◽  
Coarse Grained ◽  
Low Carbon ◽  
Toughness Improvement

Hydrogen-induced cold cracking in heat-affected zone of low-carbon high-strength steel

2014 ◽  
Vol 94 (12) ◽  
pp. 764-771 ◽  
Author(s):  
Liangyun Lan ◽  
Xiangwei Kong ◽  
Zhiyong Hu ◽  
Chunlin Qiu
Keyword(s):  
Heat Affected Zone ◽  
High Strength Steel ◽  
High Strength ◽  
Cold Cracking ◽  
Low Carbon

The determining role of reversed austenite in enhancing toughness of a novel ultra-low carbon medium manganese high strength steel

2015 ◽  
Vol 104 ◽  
pp. 87-90 ◽  
Author(s):  
Jun Hu ◽  
Lin-Xiu Du ◽  
Guo-Sheng Sun ◽  
Hui Xie ◽  
R.D.K. Misra
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Low Carbon ◽  
Reversed Austenite

scholarly journals Metallurgical Effects of Niobium and Molybdenum on Heat-Affected Zone Toughness in Low-Carbon Steel

2019 ◽  
Vol 9 (9) ◽  
pp. 1847 ◽  
Author(s):  
Hardy Mohrbacher
Keyword(s):  
Heat Treatment ◽  
Heat Affected Zone ◽  
High Strength ◽  
Post Weld Heat Treatment ◽  
Coarse Grained ◽  
Accelerated Cooling ◽  
Low Carbon ◽  
Structural Applications ◽  
Steel Grades ◽  
Weld Heat

Modern weldable high strength steel grades are typically based on low-carbon alloy concepts using microalloying for obtaining a good strength-toughness balance. Such steel grades having a yield strength in the range of 420 to 690 MPa are very commonly used in pipelines, heavy vehicles, shipbuilding and general structural applications. Thermomechanical processing during hot rolling combined with accelerated cooling is an established means of producing such steel grades. Considering the alloying concepts, the use of niobium and molybdenum, and in selected cases boron, is very efficient to achieve high strength and good toughness. However, all targeted applications of such high strength steels involve extensive welding. Thus, heat affected zone properties are of particular importance. The present paper investigates the effects of Nb, Mo and Ti on the heat affected zone properties. Variations of the Mn and Si contents are considered as well. Additionally, the influence of post-weld heat treatment in the coarse-grained heat-affected zone (HAZ) is considered. In this approach, HAZ subzones were generated using laboratory weld cycle simulations in combination with systematic variation of alloying elements to scrutinize and interpret their specific effects. The results indicate that Mo and Nb, when alloyed in the typical range, provide excellent HAZ toughness and guarantee sufficiently low ductile-to-brittle transition temperature. An alloy combination of Nb, Mo and Ti improves performance under hot deformation conditions and toughness after post-weld heat treatment.

Sign in / Sign up

Export Citation Format

Share Document