Variation in the Type IV cracking behaviour of a high Cr steel weld with post weld heat treatment

2003 ◽  
Vol 80 (6) ◽  
pp. 405-413 ◽  
Author(s):  
S.K Albert ◽  
M Matsui ◽  
T Watanabe ◽  
H Hongo ◽  
K Kubo ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Post Weld Heat Treatment ◽  
Steel Weld ◽  
Type Iv ◽  
Type Iv Cracking ◽  
Weld Heat

Post-weld Heat Treatment and Groove Angles Affect the Mechanical Properties of T92/Super 304H Dissimilar Steel Weld Joints

2018 ◽  
Vol 37 (7) ◽  
pp. 649-654 ◽  
Author(s):  
Wang Shuo ◽  
Wei Limin ◽  
Cheng Yi ◽  
Tan Shuping
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Weld Metal ◽  
Arc Welding ◽  
Post Weld Heat Treatment ◽  
Steel Weld ◽  
Dissimilar Weld ◽  
Weld Joints ◽  
Gas Tungsten Arc ◽  
Weld Heat

AbstractThe microstructures and mechanical properties of dissimilar weld joints between T92 and Super 304H steels were investigated. Dissimilar weld joints with four groove angles were constructed using gas tungsten arc welding. The results showed that post-weld heat treatment improved the mechanical properties of the dissimilar weld joints. The optimal groove angle for T92/Super 304H dissimilar weld joints was found to be 20°, considering mechanical properties. Furthermore, the transformation from equiaxed dendrites to columnar dendrites was observed in the weld metal. Epitaxial growth and delta ferrites were found around the fusion line between the Super 304H and the weld metal.

TEM Investigations of the Microstructure of 7CrMoVTiB10-10 Steel Weld Metal

2015 ◽  
Vol 231 ◽  
pp. 101-106
Author(s):  
Krzysztof Pańcikiewicz ◽  
Anna Zielińska-Lipiec
Keyword(s):  
Heat Treatment ◽  
Chemical Composition ◽  
Weld Metal ◽  
Important Implication ◽  
Post Weld Heat Treatment ◽  
Steel Weld ◽  
Technological Properties ◽  
Cooling Conditions ◽  
Steel Weld Metal ◽  
Weld Heat

7CrMoVTiB10-10 (T24) steel is recommended for fabrication of boiler components such as water walls, water panels or headers without post weld heat treatment (PWHT). The chemical composition of this steel and cooling conditions after welding influence the susceptibility to cracking in weld metal during and after welding. TEM investigations showed that in the as-welded microstructure mixtures of bainite and martensite were dominating. This has an important implication for technological properties.

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