scholarly journals Effect of Heat Input on Microstructure and Corrosion Behavior of High Strength Low Alloy Steel Welds

2021 ◽  
pp. ArticleID:210449
Author(s):  
Hua Qin ◽  
Keyword(s):  
Alloy Steel ◽  
Corrosion Behavior ◽  
Heat Input ◽  
High Strength ◽  
Low Alloy Steel ◽  
Steel Welds

Controlling distortion in gas metal arc high strength low alloy steel welds

2021 ◽  
Author(s):  
Rami Rafea Abdul-Ameer ◽  
Saad Hameed Al-Shafaie ◽  
Abdulsameea Jasim Jilabi
Keyword(s):  
Alloy Steel ◽  
High Strength ◽  
Low Alloy Steel ◽  
Steel Welds

Thermal Simulation Study of 900MPa Grade High-Strength Low Alloy Steel in Welding Procedures

2011 ◽  
Vol 704-705 ◽  
pp. 1128-1132
Author(s):  
Di Xin Yang ◽  
Yuan Fang Sun
Keyword(s):  
Alloy Steel ◽  
Heat Input ◽  
High Strength ◽  
Weld Bead ◽  
Peak Temperature ◽  
Welding Parameters ◽  
Chemical Compositions ◽  
Low Alloy Steel ◽  
Hydraulic Support ◽  
Welding Heat Input

Hydraulic support is an important part of fully mechanized equipments. The constructional steels of hydraulic support with international advanced level mainly adopt the high-strength welding structural steel with its tensile strength of more than 700~1000MPa.This paper analyzes the chemical compositions features of S890 high-strength low alloy steel for 900MPa grade.The Influence of welding parameters,peak temperature and on the microstructures and mechanical properties of welding HAZ of S890 high-strength low alloy steel were investigated by thermo-simulated tests, The influence of welding heat input on the mechanical behaviors of the welded joint was also investigated. The results show that the microstructures of S890 steel change from tempered martensite to bainite and a little ferrite , pearlitic when welding heat input changes from low to high, and accompany the austenite grains coarsening ,so the impact toughness and hardness of welding HAZ at lower peak temperatures and shorter are higher than that at higher peak temperature and long . Welding HAZ produced by the second weld bead will overlap partially with the HAZ produced by the first weld bead. In this area, primitive microstructure tempers again or partial re-phase transformations and re-cools,but the area involved in the overlap is limited,so the influence on the properties of S890 steel is not obvious. In covered arc welding,the influence on the welded join strength of S890 steel is not distinct when heat input change in a certain scope, but the plasticity of the welded join falls off steeply as heat input increases. Keywords: S890 steel; high-strength low alloy steel; weld performance; hydraulic supports

Fracture toughness analysis of heat-affected zones in high-strength low-alloy steel welds

1993 ◽  
Vol 24 (5) ◽  
pp. 1133-1141 ◽  
Author(s):  
Sunghak Lee ◽  
Byung Chun Kim ◽  
Dongil Kwon
Keyword(s):  
Fracture Toughness ◽  
Alloy Steel ◽  
High Strength ◽  
Low Alloy Steel ◽  
Steel Welds
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