Influence of various methods of heat treatment on the microstructure and mechanical properties of the simulated heat affected zone of welded joints of gas pipeline branches

2021 ◽  
pp. 18-21
Author(s):  
I.Yu. Utkin ◽  
◽  
D.V. Ponomarenko ◽  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Heat Affected Zone ◽  
Welded Joints ◽  
Gas Pipeline ◽  
Microstructure And Mechanical Properties

Multilayer Cu/Al/Cu explosive welded joints: Characterizing heat treatment effect on the interface microstructure and mechanical properties

2018 ◽  
Vol 35 ◽  
pp. 657-663 ◽  
Author(s):  
Mohammadreza Khanzadeh Gharah Shiran ◽  
Gholamreza Khalaj ◽  
Hesam Pouraliakbar ◽  
Mohammad Reza Jandaghi ◽  
Akbar Soltani Dehnavi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Effect ◽  
Welded Joints ◽  
Interface Microstructure ◽  
Microstructure And Mechanical Properties

Effect of Cooling Condition on Microstructure and Mechanical Properties in Large Line Energy Welded Joints of Ultra-Fine Grained Steel

2011 ◽  
Vol 189-193 ◽  
pp. 3345-3350 ◽  
Author(s):  
Hong Yun Zhao ◽  
Li Zhou ◽  
Bo Chen ◽  
Guo Dong Wang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Heat Affected Zone ◽  
Welded Joints ◽  
Cooling Condition ◽  
Water Cooling ◽  
Line Energy ◽  
Fine Grained ◽  
Heavy Plate ◽  
Microstructure And Mechanical Properties

The medium and heavy plate of 800 MPa grade ultra-fine grained steel was welded by CO2 gas shielded welding using large line energy. The effect of cooling condition on microstructure and mechanical properties of welded joints was investigated. The results showed that the cases about significant grain size increasing and strength decreasing do exist in the heat affected zone of large line energy welded joints of 800 MPa grade ultra-fine grained steel. Grain growth and softening in the heat affected zone could be suppressed effectively by water cooling in the course of welding. The mechanical properties of welded joints could be significantly increased by water cooling, and the process of CO2 gas shielded welding under water cooling is practical for joining ultra-fine grained steel using large line energy.

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.

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