【摘要】：為解決10Ni5CrMoV高強鋼厚板在大拘束度條件下焊接時無法避免的冷裂紋問題,自行研制了強度低于母材的高鉻鎳奧氏體不銹鋼焊絲,采用低強匹配工藝對10Ni5CrMoV低合金高強鋼厚板進行焊接并分析了接頭組織性能.結(jié)果表明,采用該焊絲焊縫成形良好,無裂紋缺陷.焊縫主要由樹枝狀奧氏體組織組成,枝晶間有少量顆粒狀析出相.其接頭抗拉強度800 MPa,彎曲試驗無斷裂,沖擊韌性A_(KV)(-80℃)大于90 J,滿足技術(shù)要求.
[Abstract]:In order to solve the cold crack problem of 10Ni5CrMoV high strength steel thick plate welded under the condition of high restraint degree, a high chromium nickel austenitic stainless steel wire with lower strength than base metal was developed. The 10Ni5CrMoV low alloy high strength steel thick plate was welded by low strength matching process and the microstructure and properties of the joint were analyzed. The results show that the welding wire is well formed and has no crack defect. The weld is mainly composed of dendritic austenitic structure and a small amount of granular precipitates between dendrites. The tensile strength of the joint is 800MPa, the bending test has no fracture and the impact toughness A _ (KV) (-80 鈩，

本文編號：2167389