For weld structure fatigue life forecasting, it has important theory meanings and practical applying value.
对焊接结构疲劳寿命的预测有重要理论意义和实际应用价值。
We can forecast the weld structure and mechanical properties according to data base on welding CCT-diagrams, optimize welding technology.
通过调用焊接CCT图可以预测焊缝组织和性能，实现焊接工艺优化。
Weld structure may appear flaw, wear or damage when worked under the complex and rigorous condition for a long time, which eyen lead equipments into waster.
焊接结构在复杂和苛刻的条件下长期工作会出现裂纹、磨损或损坏，严重时甚至导致设备报废。
Abstract: This subject was raised by an automotive company. Based on the welding design on the curved surface, the effect of prior deformation on the weld structure was studied.
摘要：基于某汽车公司提出的曲面焊接设计需求，研究了变形对焊接组织的影响。
Cracks occurred in the main weld joining the web and upper wing panel of an overhead crane girder of I-section, some of which have expanded to the structure material and even led to girder fracture.
桥式起重机采用工字形截面作为主梁，使用多年后该结构形式的主梁上翼缘板和腹板连接的主焊缝及母材多处产生裂纹，甚至发生主梁断裂事故。
It's a new method to increase fatigue strength of welded joints and structure by peening toe of weld with ultrasonic peening equipment.
使用超声波冲击焊趾来提高焊接接头及结构的疲劳强度，是一种国际上刚刚出现的新方法。
The microstructure and fine structure of weld fusion zone for high strength fine grain steel were studied.
研究了高强度细晶粒碳素钢焊接接头熔合区附近的显微组织及精细结构。
Weld with trailing impactive rolling (WTIR) is a new technique to reduce the residual stress and distortion and prevent hot cracking of thin-walled structure.
随焊冲击碾压是一种控制薄壁结构焊接应力变形、防止热裂纹的新方法。
A method about improving the crack resistance of weld metal and reducing structure stress during welding process, i. e. hammering welds and watered rapid cooling after welding, was obtained.
研究出了提高焊缝金属抗裂性能及降低焊接过程结构内应力的工艺方法——焊后捶击焊逢并浇水快速冷却。
On the basis of abroad and domestic references about large welded gear and its objects, computer aided design for the large welded gear is achieved in selection of structure form, size and weld.
在分析焊接齿轮资料和实物的基础上，实现了用计算机对大型焊接齿轮的结构型式、尺寸、焊缝进行辅助设计。
Weld thermal cycle simulation was used to reproduce the structure in the HAZ of single run and multi-layer welding.
采用焊接热模拟再现了单道焊和多层焊haz的组织。
According to the functional requirements, their technical characteristics consist of two ways on seal, ceramic package seal weld and tube polysulfone whirl forge seal, and the compact structure.
根据功能要求，本电气贯穿件的技术特点是采取了陶瓷组件封焊和钢管聚砜旋锻密封两种密封方法，以及紧凑的结构方式。
The development procedure of the milling machine on line used in production of weld H type section steel was described in details, including the design idea, structure mode and working principle.
详细阐述了焊接H型钢生产线在线铣削机研制过程中的设计思想、结构形式和工作原理，介绍了设备的结构特点和使用效果。
The research showed that the structure of weld mark was connected with the material formulation, die mould of extrusion machine and parameters of processing technology.
研究发现，熔接痕的结构与材料配方、挤出机机头模具及加工工艺参数均有关系。
The strain mode based approach to identify weld damage in members of steel structure automatically is demonstrated in present paper.
研究了基于应变模态的钢结构构件焊缝损伤的自动识别方法。
The research focuses on the defect equivalent analytical methods in building steel structure butt weld fusion and the effects of non-crack-type defects on the normal use of butt weld fusion.
本课题研究了建筑钢结构熔透对接焊缝中缺陷当量的分析方法和非裂纹类缺陷对焊缝正常使用的影响。
Through analysis of structure of the socket weld connection pieces, determined the layout project, designed a progressive die. Introduced the design points of main parts and die structure.
通过对插座连接焊片结构特点的分析，确定该冲压件的排样方案，设计了一副级进模。介绍了主要工作零件及模具总装结构设计。
The results showed that nonmetallic inclusions in weld seam served as crack initiation site under external bend load, and large amount of m a structure resulted in cleavage fracture of weld seam.
结果表明，焊缝金属中存在的非金属夹杂物，在低应力作用下形成微裂纹成为裂源，加之焊缝组织中存在大量的MA结构群，从而发生焊缝金属在室温下的解理断裂。
The difficult technical problems are solved due to the structure design improvement, local structure and weld position changes.
通过对其结构进行设计改进，改变局部结构及焊缝位置，解决了多年来工艺方面的难题。
This article discusses causes of weld cracking in crane's steel structure, recommends ways of remedy and makes proposals concerning design and fabrication to avoid cracks.
本文论述几种起重机钢结构焊缝裂纹产生的原因，提出焊缝裂纹的修复方法和起重机钢结构设计、制造中防止焊缝开裂的改进措施。
Effects of electromagnetic stirring on the shape, structure and mechanical properties of pulse metal inert gas (MIG) weld of 2219 Al-Cu alloy were investigated.
研究电磁搅拌对2219铝铜合金脉冲MIG焊焊缝形状、组织及性能的影响。
The structure, constitute, working principle, and design feature of automatic welding system which pro- duces extra- thin, large diameter, long tube, and longitudinally or circle weld are introduced.
介绍了超薄壁，大直径，长筒体，纵、环缝自动焊接系统的结构、组成、工作原理及设计的主要特点。
According to the different product structure, butt fusion welding process and lap seam welding process are used to respectively weld left and right half shell of upper body.
上体左、右半壳直焊缝视产品结构不同，分别采用对接熔化焊和搭接缝焊工艺。
In addition, it is introduced that the layer, impurities and band structure in base material are harmful to the weld quality of ERW steel pipe.
另外介绍了母材缺陷分层、夹杂物、带状组织对ERW焊缝的危害性。
The paper introduces the basic principle, structure and distinguishing tactics of the weld seam defects distinguishing expert system based on neural network.
介绍了基于神经网络的焊缝缺陷识别专家系统的基本原理、结构和识别策略。
Sulfur can significantly influence the shape and size of the weld and final weld metal solidification structure by altering flow patterns.
表面活性元素硫主要是通过改变熔池中流体的流动方式来影响熔池的形状和尺寸。
The weld nugget had a dynamic recrystallized, fine isometric crystal structure.
其中，焊核为明显的再结晶等轴晶粒，晶粒明显细化；
The article discusses and finds the Auster grain growing rules and relations of structure and properties of X70 steel in weld pipe and pipe accessories under the different heating temperature.
研究了一种适用于管道钢管和管件制造的X70级管线钢在不同加热温度下的奥氏体晶粒长大规律和组织-性能间的关系。
The article discusses and finds the Auster grain growing rules and relations of structure and properties of X70 steel in weld pipe and pipe accessories under the different heating temperature.
研究了一种适用于管道钢管和管件制造的X70级管线钢在不同加热温度下的奥氏体晶粒长大规律和组织-性能间的关系。
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