The efficiency of welded metals depends on the weld metal’s quality to achieve its useful life. Ability of the weld metal to meet the above-mentioned requirements is determined by its physical and mechanical properties. In the present study, eight pairs of specimens were used in four groups for diffusion bonds of St37 to 1.2542 steels so that, diffusion bonds was performed on two groups without pressure and two groups with pressure (2 MPa). Then, the groups alternatively underwent deep cryotreatment (DCT) for 10 hrs; finally, all the groups were tempered at 150°C for 1h. The obtained results indicated that, under the non-pressure conditions, DCT had no significant effect on the bond’s strength; while under pressure conditions, the DCT led to a 59% decrease in the bond’s strength from 15.1 to 6.2 MPa. In addition, in the absence of DCT, applying pressure during process increased strength of the bond from 12.0 to 15.1 MPa (25.8%), the reason of which is attributed to the increase in the bond’s length from 160 to 220μm.
کلید واژگان :Bond’s strength; DCT; Diffusion bonds
ارزش ریالی : 600000 ریال
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