Research on large heat input SAW joints pro-perties of F460Z high strength steel for ocean engineering

海洋工程用F460Z高强钢大热输入埋弧焊接头性能研究 Research on large heat input SAW joints pro-perties of F460Z high strength steel for ocean engineering 曾鹏 ZENG Peng 1 first-author 易杰 YI Jie 1 2 corresp 444623777@qq.com 周全 ZHOU Quan 1 罗杨 LUO Yang 1 沈小淳 SHEN Xiaochun 1 湖南工业职业技术学院 湖南工业职业技术学院 Hunan Industry Polytechnic Hunan Industry Polytechnic 湖南大学汽车车身先进设计制造国家重点实验室 湖南大学汽车车身先进设计制造国家重点实验室 State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University 采用CHW-S3AB型焊丝匹配CHF102型烧结焊剂,在50 kJ/cm大热输入下进行埋弧自动焊焊接F460Z钢,研究F460Z钢焊接接头力学性能、金相组织和断口形貌。结果表明:当焊接电流为750 A、焊接电压为39 V、焊接速度为33.3 cm/min、预热温度为180℃时,可获得最优焊接接头,其抗拉强度为583 MPa,焊缝、熔合线和热影响区-60℃冲击吸收能量分别为55 J、62 J和71 J,焊缝组织主要由针状铁素体组成,焊接接头各项指标均满足标准要求,为大热输入埋弧焊在海洋工程领域的应用提供了理论和试验依据。 The SAW with large heat input（50 k J/cm） is used for automatic welding of F460 Z high strength steel with CHW-S3 AB wire and CHF102 flux. The mechanical prope-rties,microstructures and fracture morphology of the welded joints are researched. The results show that when the welding parameters are wleding current of 750 A,welding voltage of 39 V,welding speed of 33.3 mm/min,and preheating temperature at 180 ℃,the optimal joint is obtained,and its tensile strength is 583 MPa. The impact absorption powers of weld,bond line and HAZ at-60 ℃ are 55 J,62 J and 71 J respectively. The weld microstructure is mainly composed of acicular ferrite,and all indexes of welded joint meet the standard requipments.This provides theoretical and experimental basis for the application of SAW with large heat input in ocean engineering. 海洋工程 大热输入 F460Z 埋弧焊 低温韧性 ocean engineering large heat input F460Z SAW low-temperature toughness TG457.11 2022-03-08 1 51