2021年12月25日,2022年全国海事工作会议在京召开.会议采用电视电话形式召开.交通运输部党组成员、副部长赵冲久出席会议并讲话,部海事局党组书记、局长曹德胜作工作报告.
To investigate the influence of temperature field of friction stir welding (FSW) 2219 aluminum alloy thick plate, and to achieve effective prediction of temperature field, the authors establish a three-dimensional numerical simulation model of FSW 18 mm t
The effect of the shielding gas composition and the cathode processing history on the weld formation quality during welding with a non-consumable electrode at high current was studied. The major reasons for pores,“waists”and undercuts formation during wel
Owingto diamond excellent physical and chemical properties, so synthetic diamond abrasives are extensively used in manufac-turing diamond tools are utilized in machining hard and brittle materials. The brazing technology is exploited with strong bonding f
In this paper,the rapid and integrated manufacture method of 3D printing gun drill is put forward. The 3D printing process test of the composites gun drill composed of medium carbon steel drill shank, low alloy steel drill pipe and tungsten cobalt hard al
To evaluate themetallurgical properties of ERNiCrMo-4 and ER304 welding wires in the Hastelloy C276 and 316L stainless steel lap-welded joints, the analyses of microstructure, hardness, element distribution and mechanical properties were conducted. The re
Thermal fatigue performance of copper/stainless steel explosive welding joint was investigated by using a highly effective thermal fatigue test device. The testing device adopted induction coil to heat and carry out two groups of thermal fatigue test at t
7xxx welding wire was self-made by spray forming ingots drawn to series welding wires products, and then TIG butt welding test is used for 5 mm thick 7075 high-strength aluminium alloy. After welding, the stress relief+solid-solution aging heat treatment
出台背景rn海事是综合交通运输体系的重要组成,也是我国水上主要行政执法力量,肩负着保障水上交通安全、保护水域环境清洁、保护船员整体权益、维护国家海上主权和人民利益的重要职责.党的十八大以来,按照交通运输部党组的统一部署,海事系统大力推进“革命化、正规化、现代化”建设,践行“航行安全、水域清洁、服务交通、奉献社会”的海事核心价值观,经过不懈努力,初步实现了“建成国内一流的经济执法系统,达到海事管理国际先进水平”的总体目标,基本建成了一支听从指挥、素质精良、作风过硬、服务人民的海事队伍,建立了职责清晰、管理规
Because the bonding interface of dissimilar metal joint between AZ31B Mg alloy and DP600 galvanized steel by keyholeless friction stir spot welding (KFSSW) is permanent bonding, the interface morphology cannot be directly observed. If the joint is separat