Titanium nitrogen binding
Titanium-nitrogen binding forms TiN particles to prevent unwanted phases and avoid corrosion.
Physical-Chemical Mechanism of Action
Titanium reacts with dissolved nitrogen in the weld pool to form stable TiN particles. This process prevents the formation of undesirable titanium sulfides or oxides that could promote corrosion.
Metallurgical Relevance & Welding Risks
Without adequate titanium-nitrogen binding, susceptibility to corrosion and formation of undesirable phases can occur. These can impair the strength and microstructure of the steel, leading to cracking and distortion.
Shop Practice & Action Guidelines
Ensure that the titanium-nitrogen binding step is performed correctly. This involves the right concentration of nitrogen in the weld pool and sufficient time for the reaction. Regulating nitrogen content between 0.1% and 0.3% can help form stable TiN particles and prevent corrosion.