电焊机2026，Vol.56Issue(6)：52-57,6.DOI:10.7512/j.issn.1001-2303.2026.06.06
窄间隙焊接用EH11K焊丝及配套焊剂研制
Development of EH11K Welding Wire and Matching Flux for Narrow-Gap Welding
刘鑫 1张晨光 2吉荣亮 1刘大为 2郝乾宇 1霍树斌 1宋昌洪 1孙墅畦1
作者信息
- 1. 哈尔滨威尔焊接有限责任公司,黑龙江 哈尔滨 150060
- 2. 哈尔滨电气动力装备有限公司,黑龙江 哈尔滨 150066
- 折叠
摘要
Abstract
To break the import monopoly of submerged arc welding consumables for narrow-gap welding of shielded nuclear main pump motors and achieve localized replacement,the research and development of EH11K submerged arc weld-ing wires and their matching SJ11HR fluxes was carried out.Aiming at the stringent requirements of the nuclear main pump's service conditions on the compositional purity,narrow-gap process adaptability,and low-temperature toughness of welding consumables,a fluoro-alkaline flux slag system was selected.By adjusting the ratio of flux components,the core process is-sues of slag adhesion and difficult slag removal under narrow-gap preheating conditions were effectively solved.To address the shortcoming of insufficient low-temperature toughness of the deposited metal at-40℃,a multi-element microalloying scheme was applied to the EH11K welding wires,which significantly enhanced the low-temperature anti-brittle fracture ca-pacity of the deposited metal.Test results showed that during narrow-gap welding,the optimized combination of EH11K wires and SJ11HR fluxes achieved automatic detachment of the slag crust,with smooth weld bead formation and excellent inter-layer fusion.For the undiluted deposited metal prepared by this consumable combination,the room-temperature tensile strength reached 540 MPa,the yield strength was 428 MPa,and the elongation after fracture was 33％.The average impact absorption energy was 166.5 J at-12.2℃ and 125.9 J at-40℃,and no fracture occurred in the drop-weight test at-40℃.All performance indicators fully met the technical requirements of the nuclear main pump project.The successful develop-ment of this localized welding consumable provides key technical support for the localization of the entire industrial chain of shielded nuclear main pump motors.关键词
屏蔽式核主泵/窄间隙焊接工艺性/预热工况/低温韧性Key words
shielded nuclear main pump/narrow-gap welding processability/preheating condition/low-temperature toughness分类
矿业与冶金引用本文复制引用
刘鑫,张晨光,吉荣亮,刘大为,郝乾宇,霍树斌,宋昌洪,孙墅畦..窄间隙焊接用EH11K焊丝及配套焊剂研制[J].电焊机,2026,56(6):52-57,6.
