scholarly journals Microstructural Characteristics and m23c6 Precipitate Behavior of the Course-Grained Heat-Affected Zone of T23 Steel without Post-Weld Heat Treatment

Metals ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 170 ◽  
Author(s):  
Seong-Hyeong Lee ◽  
Hye-Sung Na ◽  
Kyong-Woon Lee ◽  
Youngson Choe ◽  
Chung Kang
Keyword(s):  
Heat Treatment ◽  
Heat Affected Zone ◽  
Post Weld Heat Treatment ◽  
Microstructural Characteristics ◽  
Weld Heat

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.

Effect of Post-Weld Heat Treatment on Carbide Precipitation and Impact Properties of Coarse-Grained Heat-Affected Zone of Q690 Steel

2014 ◽  
Vol 989-994 ◽  
pp. 576-580 ◽  
Author(s):  
Zhen Shun Li ◽  
Sheng Li Li ◽  
Lei Tian ◽  
Xiang Hai Zhang ◽  
Ji Zhi Liu
Keyword(s):  
Heat Treatment ◽  
Grain Boundaries ◽  
Heat Affected Zone ◽  
Unit Area ◽  
Carbide Precipitation ◽  
Post Weld Heat Treatment ◽  
Coarse Grained ◽  
Impact Properties ◽  
Carbide Particles ◽  
Weld Heat

The effect of post-weld heat treatment (PWHT) on carbide precipitation and impact properties of coarse-grained heat-affected zone (CGHAZ) of Q690 Steel was studied in this paper. Carbide particles precipitated primarily at prior austenite grain boundaries and martensitic lath boundaries. When the PWHT temperature is 520–570 °C, temper embrittlement occurs. This temperature range is also where the number of carbide particles per unit area at grain boundaries reaches its maximum. The high number of particles per unit area increases the rate of crack initiation at grain boundaries under rapid loading; linking of microcracks along grain boundaries which are already weakened by impurity segregation results in TE and intergranular fracture.

Phase Identification and Mechanical Properties on Post Weld Heat Treatment of Steel St.70

2020 ◽  
Vol 851 ◽  
pp. 53-60
Author(s):  
Sendy Angkasa ◽  
Whina Septi Berlianzana Prastya ◽  
Poppy Puspitasari ◽  
Aminnudin Aminnudin
Keyword(s):  
Heat Treatment ◽  
Weld Metal ◽  
Heat Affected Zone ◽  
Treatment Process ◽  
Stress Relief ◽  
Medium Carbon Steel ◽  
Post Weld Heat Treatment ◽  
Phase Identification ◽  
Heat Treatment Process ◽  
Weld Heat

In this era, technological advances in the field of construction and industry cannot be separated from welding, while the welding of medium carbon steel is a material that is widely applied using electric arc shielded electrodes and to obtain good results a post weld heat treatment (PWHT) process can be carried out. One of the heat treatments that can be applied to the post weld heat treatment is stress relief annealing. So in this paper a test was conducted to determine the value of ST70 hardness and steel phase from welding with stress relief temperature variations of annealing 600°C, 650°C, and 700°C in the weld metal area and heat affected zone. To find out the results of testing of the post weld heat treatment process with annealing stress relief method at temperatures of 600°C, 650°C, and 700°C in the weld metal area and heat affected zone, the tests used were microstructure, micro vickers hardness and X-Ray Diffraction. The results of the hardness test show that without the post weld heat treatment process the hardness in the heat affected zone is 311.8 HV and in the weld metal area is 329 HV. Whereas from the results of the diffraction phase analysis in the heat affected zone the development of grain size rises regularly along with the increase in temperature in the stress relief annealing process.

Researches on Normalizing Heat Treatment Applied to SAW Joints with TWIN-ARC

2007 ◽  
Vol 23 ◽  
pp. 205-208
Author(s):  
Ion Mitelea ◽  
G. Gavanescu ◽  
B. Radu
Keyword(s):  
Heat Treatment ◽  
Grain Size ◽  
Heat Affected Zone ◽  
Welded Joints ◽  
Structural Modification ◽  
Post Weld Heat Treatment ◽  
Deposited Metal ◽  
Weld Heat

In this paper is analyzed the effect of normalizing post-weld heat treatment for SAW TWIN-ARC on grain size and aging of the Widmannstätten structure. Tests of elongation and toughness made with welded joints from S355J0 justify heat treatment opportunity and also the structural modification developed in deposited metal and in heat-affected zone.

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