PSI - Issue 59

D. Nosov et al. / Procedia Structural Integrity 59 (2024) 656–663 D. Nosov et al. / Structural Integrity Procedia 00 (2019) 000 – 000

660

5

(1)

+ b7·v2·v3 + b8·v1·v2·v3

where b1 - b8 – corresponding coefficients from table 1;

v1 - v3 – mode parameters (annealing time, heating time or temperature coefficient, respectively) (Table 2); v4 - v8 – prediction parameter (angle of destruction; number of cycles; probability of destruction; relative strength; type of destruction). General requirements. These recommendations are intended for the implementation of the technological cycle of welding tape made of steel 65G DSTU 8429 with a thickness of 0.4...0.6 mm and a width of 10...12 mm at an ambient temperature of 20±3 ºС. At a temperature below 16 ºС, the heat treatment regimes (preheating, annealing) must be adjusted to ensure the cooling rate does not exceed the critical one for this grade of steel.

Fig.3. Prediction of the number of load cycles ±180º before the destruction of samples depending on their annealing modes.

Fig. 2. Prediction of the destruction angle of samples depending on their annealing modes.