Development of Ti-oide bearing steel heaving high weld HAZ toughness.

Size distribution of oxides and toughness of steel weld metals

The trend in strong weld metals is towards microstructures dominated by low carbon martensite. The role of oxide particles introduced into the metal during welding then becomes uncertain. The particles do not seem to affect the nucleation or growth of martensite. This is probably because this phase forms at relatively large driving forces and therefore does not rely on heterogeneous nucleation ...

Effect of Heat Input on the Weld Metal Toughness of Chromium-Molybdenum Steel

An attempt has been made to determine the strength and impact properties of Cr-Mo steel weld and base materials by varying the current during manual metal arc welding. Toughness over a temperature range from -32 to 100°C of base, heat affected zone (HAZ) and weld zones at three current settings are made. It is observed that the deterioration in notch toughness at any zone with the temperature d...

Development of High Strength Steel Weld Metals – Potential of novel high-Ni compositions

Neural network modelling has been applied to search for novel high strength steel weld metal compositions, potentially offering improved tolerance to variations in the weld thermal cycle. An experimental 7 wt% Ni manual metal arc electrode, formulated on these predictions, was used to produce all-weld metals and welds in high strength steel. Mechanical properties were correlated to weld metal m...

Improvement of Impact Toughness of API-X70 Steel Weld metals With Electromagnetic Vibration

Improvement of Impact Toughness of API-X70 Steel Weld metals With Electromagnetic Vibration