Investigation on the Weldability of High-Strength Steels Used for Low-Temperature Environment

2019 ◽  
Author(s):  
C. Shang ◽  
S. Subramanian ◽  
X. Wang ◽  
Z. Wang ◽  
Z. Xie
Keyword(s):  
Low Temperature ◽  
High Strength Steels ◽  
High Strength ◽  
Temperature Environment

scholarly journals Adhesive Wear Resistance of Low Temperature Austempered and Quenched and Partitioned Niobium Alloyed Steels

2019 ◽  
Author(s):  
Pedro Gabriel Bonella de Oliveira ◽  
Ricardo Tadeu Junior Aureliano ◽  
Luiz Carlos Casteletti ◽  
André Itman Filho ◽  
Amadeu Lombardi Neto ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Low Temperature ◽  
Automotive Industry ◽  
Adhesive Wear ◽  
High Strength Steels ◽  
High Strength ◽  
Wear Performance ◽  
Advanced High Strength Steels ◽  
Safety Improvement ◽  
Present Complex

Abstract The quest for safety improvement with weight reduction of vehicles and consequently lower fuel consumption, led the automotive industry to begin research into the third generation of advanced high strength steels. These steels present complex microstructures, composed of martensite, bainite and stable retained austenite. Two of the main treatments for obtaining these microstructures are the low temperature austempering and Quenching and Partitioning (Q&P). The objective of this work is to evaluate the microhardness and adhesive wear performance of a high silicon steel alloyed with niobium submitted to the treatments mentioned above. The austempering treatment was conducted at 340 °C for 1 and 3 hours. Partitioning steps in Q&P were performed at 250 °C for 10, 30 and 60 minutes. Results shows that niobium addition promotes changes in the bainite morphology which improved the wear resistance.

scholarly journals Advanced Trends in Metallurgy and Weldability of High-Strength Cold-Resistant and Cryogenic Steels

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1891
Author(s):  
Andrei I. Rudskoi ◽  
Sergey G. Parshin
Keyword(s):  
Low Temperature ◽  
Welded Joints ◽  
Low Temperatures ◽  
High Strength Steels ◽  
High Strength ◽  
Research Trends ◽  
Rolled Steel ◽  
Welded Structures ◽  
Controlled Processing ◽  
Modern Methods

Thermomechanical Controlled Processing (TMCP), the initial microstructure and mechanical properties of rolled products made of high-strength steels, have a significant influence on the properties and reliability of welded structures for low temperature and cryogenic service. This paper systematizes advanced research trends in the field of metallurgy and weldability of high-strength cold-resistant and cryogenic steels. The classification and properties of high-strength steels are given and TMCP diagrams and phase transformations are considered. Modern methods of improving the viscoplasticity of rolled steel and welded joints are analyzed. The problems of the weldability of high-strength steels are reduction of impact toughness at low temperatures, hydrogen embrittlement, anisotropy, and softening of welded joints in the heat-affected zone. The authors propose a systemic concept and methods for improving the metallurgy and weldability of high-strength steels for low temperature and cryogenic service.

Sign in / Sign up

Export Citation Format

Share Document