Influence of carbon, manganese and nickel on microstructure and properties of strong steel weld metals: Part 2 – Impact toughness gain resulting from manganese reductions

2006 ◽  
Vol 11 (1) ◽  
pp. 9-18 ◽  
Author(s):  
E. Keehan ◽  
L. Karlsson ◽  
H.-O. Andrén ◽  
H. K. D. H. Bhadeshia
Keyword(s):  
Impact Toughness ◽  
Steel Weld ◽  
Microstructure And Properties ◽  
Weld Metals

scholarly journals Effects of Boron Content on the Microstructure and Impact Toughness of 12Cr1MoVR Low-Alloy Heat-Resistant Steel Weld Metals

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 926
Author(s):  
Guishan Dou ◽  
Rui Cao ◽  
Changliang Cai ◽  
Cheng Han ◽  
Xili Guo ◽  
...  
Keyword(s):  
Impact Toughness ◽  
Resistant Steel ◽  
Steel Weld ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Weld Metals ◽  
Austenite Grain ◽  
Alloy Heat ◽  
The Impact ◽  
Prior Austenite Grain

The impact toughness of low-Cr heat-resistant steel weld metal is an important problem to broaden the application of low-Cr heat-resistant steel. In this study, the microstructure and impact toughness of 12Cr1MoVR low-alloy heat-resistant steel weld metals with various boron contents (B1 = 0.0028%, B2 = 0.0054%, and B3 = 0.0079%) were investigated. The microstructures of all weld metals were composed of block ferrite, carbides, and inclusions. Results indicated that with increased B content, prior austenite grain sizes decreased, and minor microstructure changes could be found. With the increase in B content from 0.0028% to 0.0054% to 0.0079%, the ductile–brittle transition temperature of the weld metals decreased from 30 to 0 to −14 °C, the toughness of weld metal increased, and the hardness slightly decreased, all of which are directly related to the refinement of prior austenite grain size because of the addition of B content. However, on the top-shelf zone, such as at the testing temperature of 80 °C, ductile fracture dominates the fracture surface; with the increase in B content, the size and density of inclusions increased gradually, which led to the decrease of the impact toughness at 80 °C when the B content was 0.0079%.

Microstructure and impact toughness of high strength steel weld metals deposited by MCAW-RE process using different shielding gases

2021 ◽  
Author(s):  
Walker A. S. Filho ◽  
Guilherme M. S. Silveira ◽  
Jeferson F. M. Costa ◽  
Matheus C. Mendes ◽  
Luís Felipe G. de Souza ◽  
...  
Keyword(s):  
Impact Toughness ◽  
High Strength Steel ◽  
High Strength ◽  
Shielding Gases ◽  
Steel Weld ◽  
Weld Metals
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