电焊机2026，Vol.56Issue(8)：105-115,11.DOI:10.7512/j.issn.1001-2303.2026.08.11
1000MPa级高强钢配套焊材水电焊接模型水压试验验证及可靠性评估
Verification and Reliability Assessment of Hydraulic Welding Models Us-ing Welding Materials Compatible with 1 000 MPa-grade High-strength Steel for Hydrostatic Testing
摘要
Abstract
Hydraulic proof testing is a critical validation procedure for ensuring the structural integrity of welded penstock joints in hydropower stations.However,systematic experimental data remain limited regarding welded joints employing do-mestic welding consumables for 1000 MPa-grade high-strength steels.Two locally scaled cylindrical penstock mock-ups were designed and fabricated to evaluate the applicability of domestic welding consumables.The No.1 mock-up utilized do-mestic and imported 1000 MPa-grade gas metal arc welding(GMAW)wires for the longitudinal and circumferential seams,respectively,and was pressurized to 9.5 MPa.Strain gauges installed at critical weld locations recorded structural stress dis-tributions under loading.The second mock-up employed domestic 1000 MPa-grade submerged arc welding(SAW)wire/flux and 1000 MPa-grade shielded metal arc welding(SMAW)electrodes for different seams,and was pressurized to 10.25 MPa.Residual stresses were measured before and after testing,and structural displacements were monitored.Results indicate that for the No.1 mock-up,the stress-pressure relationships at all gauge locations were linear(R2≥0.99),with the maximum measured structural stress of 175.8 MPa well below the allowable stress limits for both operating and proof test conditions;no unacceptable defect indications were detected by UT and TOFD re-inspection after unloading.For the No.2 mock-up,the maximum structural stresses at 10.25 MPa were 348.9 MPa(inner wall)and 260.5 MPa(outer wall),both stress and dis-placement exhibited proportional responses to pressure,and no linear defects were found upon post-test re-inspection.Post-test welding residual stresses decreased notably,with average relief rates of 26.6％-36.6％on the inner wall and 27.9％-33.3％on the outer wall.The findings suggest that the selected domestic welding consumables and procedures can satisfy the hydraulic proof testing requirements for 1000 MPa-grade high-strength steel penstock welded structures within the scope of the mock-up configurations and test conditions presented.关键词
1000MPa级水电用高强钢/焊接材料/压力钢管/结构应力/焊接残余应力Key words
hydrostatic test/1000 MPa-grade high-strength steel for hydropower/welding consumables/penstock/structural stress/welding residual stress分类
能源科技引用本文复制引用
惠振国,田野,田井成,甘洪丰,卢天田,吴海龙..1000MPa级高强钢配套焊材水电焊接模型水压试验验证及可靠性评估[J].电焊机,2026,56(8):105-115,11.基金项目
黑龙江省重点研发计划项目(2022ZX04A01) （2022ZX04A01）
黑龙江省自然科学基金资助项目(YQ2021E007) （YQ2021E007）
