The result shows that the ring weld has weld defects and under alternating stress it will crack,which will finally cause breaking of the urea synthetic tower.
某发生事故的尿塔为多层包扎式筒体,经过金相组织检查、晶粒度测定和循环变形分析,认为环焊缝存有焊接缺陷,在交变应力作用下,焊接缺陷会萌生裂纹,并最终导致尿塔断裂失效。
Effect of simulated welding parameters on pipe girth weld residual stresses;
数值计算模拟工艺参数对管道环焊缝残余应力的影响
In order know the size and the distribution of residual stresses of mill welding seam,this paper uses blind-hole method to test the girth welds between round plate and the cylinder body of the mill produced by CBMI CONSTRUCTION CO.
为了了解滑履磨机焊缝残余应力的大小和分布规律,该文应用盲孔法对中材建设有限公司生产的某型号磨机的圆平板与圆筒体之间的环焊缝及其近缝区的表面残余应力进行了现场测试。
The mechanical properties testing and metallography testing of girth welded joints were carried out.
采用E9018-G焊条手工电弧根焊,用低组配药芯焊丝自保护焊和高组配焊条手工电弧焊填充盖面工艺焊接了X80钢级大变形钢管环焊缝,对环焊缝接头进行力学性能测试和金相观察分析。
Experimental results show that the acoustic emission technique can effectively detect heavy weld active flaws and the accurate size and location of flaws can be measured by the ultrasonic phased array technique.
试验结果表明,声发射能够有效检出深环焊缝中存在的活性缺陷,超声相控阵技术能实现活性埋藏缺陷的精确定位和测量。
Ductile tearing assessment of surface flaw in circumferential weld of pipe-line based on J integral parameter;
基于J参量的管道环焊缝表面缺陷塑性撕裂评定
This paper consider the influences of materials,stress,process and diffusion hydrogen etc on the circumferential weld cracks in steel cylinders,analyzes the microstruture and fracture appearance by scanning electron microscope and metallography microscope,and finds out the main reasons why cracks emerge and also the prevention measures.
本文考察了材料、应力、工艺、扩散氢等诸因素对该钢瓶焊接时环焊缝裂纹的影响，通过扫描电镜、金相显微镜对其显微组织和断口进行了分析。
In order to solve this problem , "automatic welding system for circumferential weld of large diameter penstock" is especially developed .
在水电站压力钢管道施工中,钢管接头处往往具有大小不同的椭圆度,为解决这一问题,特地研制了"大直径压力钢管环焊缝组装对接自动化系统"。
Ultrasonic testing is an important flaw detection technology of oil and gas pipeline girth welds.
超声检测是油气管道环焊缝缺陷检测的一项重要技术。
Research on pipeline girth welding joint with copper infiltration and copper back-up shoes root welding
管道环焊缝采用铜衬垫根焊及焊缝渗铜研究
Analysis on key technologies for pipeline internal circumferential automatic welding machine with multi-torch
管道环焊缝多焊炬自动内焊机关键技术分析
Research of root welding technology and welding procedure with back-up shoes pipeline girth welding
带衬垫的管道环焊缝根焊技术及焊接工艺
Experimental study circumferential weld residual stress of submarine pressure hull
潜艇耐压壳环焊缝焊接残余应力模拟实验研究
Girth Welding of Large Reel Structure Pieces of Shell and Tube Plate
大型卷筒结构筒壳与幅板环焊缝的焊接
Application of GMAW for Girth Joint of Cryogenic Tank
GMAW在不锈钢低温贮槽环焊缝上的应用
Girth Weld Defects Assessment of Strain-based Design Pipelines
基于应变设计的管道环焊缝缺陷评估
High Strength Matching Study on Circumferential Weld of High Grade Line Pipe
高钢级管线钢管环焊缝高强匹配研究
The Study on Ultrasonic Automatic Test Technology of the Middle and Small Modulus Gear Weld;
中小模数齿轮环焊缝超声自动检测技术研究
In-situ detection of weld metal thermal cycle of 10CrMo910 steel
10CrMo910钢焊缝焊接热循环的实时检测
The Temperature Control System in HF Spiral Pipe Mill
高频螺旋焊管焊缝温度的闭环控制系统
Application of PIW48 pipe inner girth welding line
国产PIW48管道内环缝自动焊机焊接技术应用
Analysis and countermeasures of overproof of the edge deviation of welding line in circular seam welding of boiler drum
锅筒环缝对接焊缝边缘偏差超标分析及对策
The Study on Ultrasonic Testing of the Laser-Welding Seam Depth of the Gear Ring;
齿轮环激光焊缝深度超声检测的研究
Design and Application of Automatic Following System of Circular Welding Seam;
环形焊缝自动跟踪系统的设计与应用
Experimental Study of Laser Girth Welding for Line Pipe Steel X100
X100管道钢环缝激光焊接的试验研究
WELDING TECHNOLOGY,WELDING MANAGEMENT AND THE QUALITY CONTROL OF THE STEEL BOX GIRDER OF HUANGPU BRIDGE OF PEARL RIVER IN GUANGZHOU
广州珠江黄埔大桥钢箱梁环缝焊接工艺、焊接管理及焊接质量控制
Welding the welds which are stagger first, then is the straight ang long weld.
先焊错开的端焊缝，后焊直通长焊缝。