摘要
研制了一种金红石型SG90T-9C渣气联保药芯焊丝,研究了硅、锰添加量对焊丝熔敷金属和焊接Q960E钢焊缝金属组织和性能的影响,以及热输入对焊缝组织中M/A岛形貌的影响,并与同级别CHT91K2和ESAB91K2焊丝以及HC8Mn2SiA焊丝/HJ431焊剂进行了综合性能对比分析。结果表明:随着锰、硅添加量增加,熔敷金属抗拉强度增大,冲击韧性先增大后减小;随焊接热输入增加,M/A岛由点状转变为块状并富集于晶界,热输入应控制在10kJ·cm^(-1)以内;与其他焊材相比,SG90T-9C焊丝熔敷金属的力学性能优异,焊接Q960E钢所得焊缝质量较好,焊接Q960E钢梁架的气孔率和返修率显著降低。
A rutile type SG90T-9C slag-gas bonded protection flux cored welding wire was developed.The effect of the amount of silicon and manganese on microstructure and properties of the welding wire deposited metal and weld metal by welding Q960E steel was studied.The effect of heat input on morphology of M/A island in the weld microstructure was studied.The comprehensive properties of SG90T-9C welding wire were compared with CHT91K2,ESAB91K2 welding wires and H08Mn2SiA welding wire coupling HJ431 flux.The results show that with increasing manganese and silicon addition,the tensile strength of the deposited metal increased,and the impact toughness increased and then decreased.With increasing heat input,the M/A island shape changed from point to block and the island gathered on boundaries.The heat input should be controlled within 10 kJ·cm^(-1).Compared with other welding materials,the SG90T-9C welding wire deposited metal had excellent mechanical properties,the weld quality by welding Q960E steel was better,and the porosity and repair rate by welding Q960E steel frame reduced significantly.
作者
张楠
田志凌
张书彦
张飞虎
ZHANG Nan;TIAN Zhiling;ZHANG Shuyan;ZHANG Feihu(Institute of Welding,Central Iron and Steel Research Institute,Beijing 100081,China;Dongguan Material Gene Advanced Institute of Technology,Dongguan 523808,China;Shougang Research Institute of Technology,Beijing 100041,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2020年第12期53-61,共9页
Materials For Mechanical Engineering
基金
广东省“珠江人才计划”引进创新创业团队资助项目(2016ZT06G025)
广东省自然科学基金资助项目(2017B030306014)。
