ZOU Liwei, SHEN Tiankuo, FENG Wei, et al. Development of EQ309L stainless steel materials for submerged arc cladding with band-electrode in nuclear power industry[J]. 2021,51(6):92-97. DOI： 10.7512/j.issn.1001-2303.2021.06.17.
By rationally adjusting the ferrite content of deposited metal on EQ309L,the elongation after fracture after long-term heat treatment is improved. The problem that tensile strength at room temperature can not be stable ≥520 MPa is solved by nitrogen-controlled treatment of EQ309L welding strip;by changing the ratio of carbonate,silicate and fluoride in welding flux,the process performance of welding flux is improved and the surface indentation and slag problem are solved. All performances of developed EQ309L stainless steel materials for submerged arc cladding with band-electrode,WEQ309 HR welding strip and WSJ309 HR agglomerated flux meet the requirements of nuclear power equipment manufacturing.Meanwhile,the influence rules of welding heat input,welding current and welding speed on the properties of EQ309L deposited metal are studied,and it is found that the material has a very wide range of process parameters applicability.
submerged arc cladding with band-electrodeelongation after fracturetensile strength