METHOD OF FOLLOWING PRODUCTION THERMAL TREATMENT OF ADDITIVELY MADE ARTICLES FROM SUPER-HARDENED GAMMA-TYPE SUPER FELL CHARTS Russian patent published in 2019 - IPC C22F1/10 C22F1/18 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly, to additive manufacturing methods. Method for additive manufacturing of article from hardened γ'-phase of superalloy on the basis of Ni, and/or Co, and/or Fe, or their combination includes provision of additively manufactured item and its thermal treatment. Thermal treatment is carried out first by heating the article from room temperature (RT) to temperature T₁ at heating rate v₁, wherein temperature T₁ at 50–100 °C below temperature T_s start of reduction of coefficient of thermal expansion, and article holding during time t₁ at T₁ to achieve uniform temperature of article. Then, by heating the article at heating rate v₂ at least 25 °C/min from T₁ to temperature T₂ ≥ 850 °C, providing elimination or at least reduction of release γ'-phases.

EFFECT: obtaining articles without cracks compared to considerable cracking of products thermally treated in a traditional way.

6 cl, 5 dwg