METHOD OF PRODUCING WELDED SHEET ARTICLES FROM TITANIUM ALLOYS Russian patent published in 2011 - IPC B23K103/14 C22F1/18 

FIELD: metallurgy.

SUBSTANCE: proposed invention can be used in producing aircraft structures from titanium alloys. Welding is performed in one pass with metal cooling rate in thermal effects zone in temperature range from T_α+β→β to T_rs determined by formula V_COOL=K·(50…130)°C/s, where T_α+β→β is the temperature of polymorphous conversion; T_rs is the temperature of recrystallisation start; K is the factor to allow for metal physical and mechanical properties, K=0.8… 1.5. Annealing temperature T_ANN is determined by formula T_ANN=V_COOL·K₁+370, where K₁ is the factor depending upon doping level and metal strength, K₁=0.1…1.5.

EFFECT: longer service life.

1 tbl, 3 ex