Mechanical properties of T23 steel welded joints without post-weld heat treatment for fossil fired boilers

2016 ◽  
Vol 31 (24) ◽  
pp. 4000-4008 ◽  
Author(s):  
Xue Wang ◽  
Yong Li ◽  
Huijun Li ◽  
Chao Yang ◽  
Qing-xu Yang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Welded Joints ◽  
Post Weld Heat Treatment ◽  
Image Position ◽  
Weld Heat

Abstract

Fatigue of Laserbeam Welded Joints of High-Carbon Steel Strips

2010 ◽  
Vol 659 ◽  
pp. 61-66
Author(s):  
Attila Magasdi ◽  
János Ginsztler ◽  
János Dobránszky
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Carbon Steel ◽  
Heat Affected Zone ◽  
Welded Joints ◽  
High Carbon Steel ◽  
Post Weld Heat Treatment ◽  
High Carbon ◽  
Steel Strips ◽  
Weld Heat

The high-carbon steel strips are one of the most widely used base materials of bandsaw blade manufacturing. These materials have sufficient strength and ductility to cope with the high fatigue load of the bandsaw blades. These endless strips are produced by welding, and therefore the weld and the heat affected zone have different mechanical properties, like tensile strength and fatigue resistance, than the base material. These properties of the weld can be influenced by preheat and post weld heat treatment. Regarding to the latest industrial requirements, the application of laserbeam welding was examined to produce higher standard bandsaw blade. The laserbeam welded joints has lower heat input and narrower heat affected zone compared to metal inert gas (MIG) welding, which is currently used in bandsaw blade manufacturing. To assure the proper mechanical properties and sufficient resistance to fatigue, an examination was carried out to determine the effect of preheat temperature and post weld heat treatment time on the mechanical properties and fatigue behaviour of the laserbeam welded joint.

scholarly journals A METHOD FOR ASSESSING THE OPERATIONAL RELIABILITY OF WELDED CONNECTIONS FROM 09G2S STEEL WORKING IN ENVIRONMENTS CAUSING CORROSIVE CRACKING

2021 ◽  
pp. 72-81
Author(s):  
I. A. Trishkina ◽  
E. I. Storozheva ◽  
A. Yu. Feitullaev ◽  
R. E. Novikov
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Welded Joints ◽  
Operational Reliability ◽  
Post Weld Heat Treatment ◽  
Corrosion Cracking ◽  
Oil Refineries ◽  
09G2s Steel ◽  
Metallographic Method ◽  
Weld Heat

Based on the study of the structure and mechanical properties of the metal of welded joints of 09Г2С steel, a metallographic method has been proposed, which makes it possible to establish the fact of post-weld heat treatment when determining the causes of corrosion cracking in aggressive environments of petrochemical and oil refineries, as well as supervising welding operations.

Evolution of Mechanical Properties and Microstructural Characterization of Aluminum AA-6061 Butt-Welded Joints

2011 ◽  
Author(s):  
Ajay A. Kardak ◽  
M. A. Wahab
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloys ◽  
Fracture Surface ◽  
Welded Joints ◽  
Welding Process ◽  
Post Weld Heat Treatment ◽  
Age Hardening ◽  
Welding Processes ◽  
Weld Heat

Aluminum alloys because of their high strength to weight ratio have various applications as structural material in railways, ship building, aeronautics, construction, and consumer appliances. This increased use of aluminum alloys calls for more efficient and reliable welding processes which has always represented a great challenge for designers and technologists. AA-6061 Aluminum Alloy (Al-Mg-Si) is widely used in the aircraft industry and has gathered wider acceptance in the fabrication of light weight structures. The preferred welding process for this alloy is Tungsten Inert Gas (TIG) process due to their comparatively easier applicability, high yield, and better economy. Major difficulties are associated with this type of welding process, such as, the presence of tenacious oxide layer, high coefficient of thermal expansion, solidification shrinkage, solubility of hydrogen, and other gases in the molten state. Furthermore, problems such as decay of mechanical properties due to phase transformation and softening can occur in the heat-affected-zone (HAZ). Post weld heat treatment can be used to improve the strength of the HAZ for heat-treatable alloys like AA-6061. Hence, the major objectives of this work was to conduct a systematic study and gain an in-depth understanding of the effect of post-weld heat treatment (PWHT) of these joints on tensile properties, micro hardness, microstructure, and fracture surface morphology of butt-welded joints. It was found that of all the PWHT processes, Age-hardening (AH) resulted in superior mechanical properties and hardness. The reason for this enhanced strength has also been studied from metallurgical point of view. Microstructure and fracture surface of the tensile tested specimens were studied using light microscope and scanning electron microscope, respectively. Correlation has been drawn between the tensile test results, microhardness and the metallurgical results. It was found that the uniformly dense precipitation of fine Mg2Si, and the lack of precipitate-free zone could be the reason for the superior results found.

Effect of post-weld heat treatment on the mechanical properties of electron beam welded joints for CLAM steel

2013 ◽  
Vol 442 (1-3) ◽  
pp. 512-517 ◽  
Author(s):  
Qingsheng Wu ◽  
Shuhui Zheng ◽  
Shaojun Liu ◽  
Chunjing Li ◽  
Qunying Huang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Electron Beam ◽  
Welded Joints ◽  
Post Weld Heat Treatment ◽  
Clam Steel ◽  
Weld Heat
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