Study on the Cold Cracking Sensibility of SH01 Electrode for Marine High Strength Steel

Effects of cooling rate and diffusion hydrogen content on the sensibility of SH01 electrode cold cracking have been investigated by the implant and diffusion hydrogen test, and the implant fractography have been observed by SEM. The results show that SH01 electrode has lower cold cracking sensibility and its minimum R_cr (830MPa) is greater than R_p0.2. The zone of cracking initation has brittleness characteristics with intergranular and quasi-cleavage on the fracture, and the others have ductility characteristics with dimple.