PSI - Issue 30

K.V. Stepanova et al. / Procedia Structural Integrity 30 (2020) 167–172 Stepanova K.V., , Petrov P.P., Platonov A.A. / Structural Integrity Procedia 00 (2020) 000–000

170

4

strain state of the deposited material increases. It should be noted that in the deposited metal in all samples, the average elemental content of praseodymium varies from 0.12% to 0.36%, neodymium from 0.03% to 0.23%, cerium from 0.01 to 0. 16%.

Table 2. Some characteristics of deposited metal. Compositions of flux-cored wires REE content in flux (wt.%) Hardness (HB)

HAZ width (mm)

Comp1 Comp2 Comp3 Comp4 Comp5 Comp6 Comp7 Comp8 Comp9 Comp10

0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9

178 173 172 183 180 158 170 167 175 177 163

1,78 2,96 3,14 2,00 2,18 3,04 2,96 2,30 2,70 2,30 3,60

1 0

UONI 13/55

The hardness of the deposited metal of FCW of Composition 7 is 170 HB, which corresponds to the average for all compositions, and the values of residual stresses in weld bead and in the lower boundary of the surfacing are fixed at 68.8 MPa and 47.1 MPa , respectively, as depicted in Fig. 2. Since the results of the X-ray diffraction pattern confirm the predominance of compressive stresses in the sample, we can speak of a reduced level of the stress-strain state at all points of the sample.

Fig. 2. Values of residual stresses σ in samples deposited by different wires and covered electrode UONI 13/55 at 3 points.