scholarly journals Progress on effects of alloying elements on bainite formation and strength and toughness of high strength steel weld metal

2021 ◽  
Author(s):  
Tianli Zhang ◽  
Hang Yu ◽  
Zhuoxin Li ◽  
Sindo Kou ◽  
Hee Jin Kim ◽  
...  
Keyword(s):  
Weld Metal ◽  
High Strength Steel ◽  
High Strength ◽  
Alloying Elements ◽  
Steel Weld ◽  
Steel Weld Metal ◽  
Strength And Toughness

scholarly journals Effect of Pr6O11 on the Microstructures and Mechanical Properties of High-Strength Steel Weld Metal

2021 ◽  
Author(s):  
Tianli Zhang ◽  
Hang Yu ◽  
Shiliang Li ◽  
Weiguang Wang ◽  
Wen Wu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shear Stress ◽  
Weld Metal ◽  
High Strength Steel ◽  
High Strength ◽  
Surface Shear Stress ◽  
Steel Weld ◽  
Surface Shear ◽  
Steel Weld Metal ◽  
Formation Mode

The effect of Pr6O11 on the microstructure and mechanical properties of high-strength steel weld metal was investigated by optical microscopy, scanning electron microscopy and mechanical testing. Three different contents of Pr6O11 were added to the flux-cored wires. The results demonstrate that the addition of 1% Pr6O11 can promote the refinement and spheroidization of inclusions, refine the grains, form acicular ferrites in the weld metal, and significantly improve the toughness. The addition of Pr6O11 promoted the formation of rare earth composite inclusions and acicular ferrites in the weld metal, refined the lath microstructure, inhibited the formation of martensite and bainite. The crack formation mode changed from the boundary cracking of the bainite clusters caused by the surface shear stress to the surface shear stress-induced decohesion of inclusion. Excessive addition of Pr6O11 will reduce the number of inclusion nucleation and deteriorate the mechanical properties. The wire No.2 with 1% Pr6O11 had the good comprehensive mechanical properties.

scholarly journals Effect of Ti and B on Microstructure of 780 MPa Class High Strength Steel Weld Metal

2005 ◽  
Vol 91 (4) ◽  
pp. 397-402 ◽  
Author(s):  
Hitoshi HATANO ◽  
Takeshi NAKAGAWA ◽  
Takeshi SUGINO ◽  
Noriyuki HARA
Keyword(s):  
Weld Metal ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Weld ◽  
Steel Weld Metal
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