本文将高匹配焊缝或热影响区(haz)淬硬层中含纵向裂纹的焊接接头简化为硬夹层含平行裂纹的力学不均匀体模型。
In the paper welded joints with a crack in transverse overmatched weld or HAZ were simplified into a model in which a transverse hard layer contains a crack parallel to the interfaces.
本文采用概率断裂力学方法和可靠性分析方法，针对压力容器焊接接头的组织不均匀特点，研究了焊缝区疲劳失效概率模型。
The paper studies the fatigue failure probabilistic model of the weld zone in welded joint using probabilistic fracture mechanics and reliabilitistic analysis methods.
用焊接方法连接的接头称为焊接接头，它由焊缝、熔合区、热影响区及其邻近的母材组成。
The joint which is connected by welding method is called the welding joint, which is composed of welding seam, fusion zone, heat affected zone and its adjacent base metal.
通过对焊接接头的硬度检测，发现熔合区硬度下降，焊缝区略有上升。
The hardness tests on welding joints prove this by showing that the hardness reduces in fusion area, and increases slightly in weld zone.
新控制法可以明显地减小飞溅，改善焊缝成形和扩大合理的焊接规范区。
It is proved that the new control method can obviously reduce the spattering loss, improve the weld formation and broaden the criteria of the optimum welding conditions.
通过分析l 245钢埋弧焊焊缝区质量、微观组织和拉伸性能关系表明，焊接工艺参数的合理制定是低合金钢l 245焊管产生裂纹等缺陷的关键因素。
By analyzing the relation of microstructure, weld zone quality and tensile property, it is concluded that the welding technological parameter of L245 steel is the main factor of the welding crack.
焊接过程中搅拌焊针的结构形状是影响焊缝区塑性软化材料流动方式的主要因素，从而影响焊缝的成型质量。
The structure and dimension of welding pin are the main factors which affects the flow direction of the plastic metal in FSW zone and the quality of the FSW seam.
试验钢由针状铁素体和少量块状铁素体组成，焊缝为典型的针状铁素体组织，焊接热影响区粗晶区以粒状贝氏体为主。
The toughness of weld metal is the highest while the coarse grained region in the HAZ is the lowest because of welding thermal cycle and formation of brittle microstructure.
通过对螺旋埋弧焊管内焊缝成型和焊接过程的分析，指出焊缝裂纹易产生在焊接熔池脆性温度区。
Through analysis on inside weld forming and welding procedure of SSAW pipe, it pointed out weld crack is easy to appear in brittle temperature zone in welding pool.
热板焊接导致了焊缝区的聚态结构发生变化，从而使焊接接头的强度略高于母体强度。
This kind of welding makes the change of the aggregative structure in seam zone thus resulting in a slightly better strength in this zone than in the matrix.
结果表明：焊接接头横截面宏观结构特征表现为焊核区的“洋葱环”和热-机械影响区的塑性流线变形，洋葱环的环间距随着距焊缝中心距离的增大而减小；
The experiment result shows that the spacing of onion rings, which is the most prominent features of most friction stir welds, decreases with the distance of onion ring to centerline increasing .
利用现代分析测试手段分别研究了TIG焊直接焊接镁铝和镀锡焊接镁铝的焊缝熔合区形貌，并对其进行了元素扩散行为的分析及比较。
Modern analytical methods have been used to investigate the patterns of fusion zone and the diffusion behaviors of elements by tig direct welding and tig with Sn as transition layer welding.
在进行跑车试验前，先检查焊接质量，如焊接接头所包括的焊缝、熔合区和热影响区等，以设定整个工艺流程；
The frame material and the welding procedure can be set according to the pre-judgement carried out by combining the CAE analysis with the residual stress distribution before welding.
在排除焊接残余应力导致的裂纹闭合效应后，焊缝及热影响区疲劳裂纹扩展速率与基材相当。
Moreover, the fatigue crack growth rates of the weld metal and heat affected zone are lower than those of the base metal. Having excluded the effect of welding residual tress...
测试面积包括焊缝金属和焊缝附近窄小的焊接热影响区。
Area includes both the weld metal and the narrow band of material adjacent to the weld which has been affected by the heat of welding.
从而避免了传统电镀锌板直接焊接成型油箱内表面漏镀、焊缝及热影响区锌层烧损等缺陷。
It can also avoid pretermission of plating, burnout of zinc layer on weld beam and heat affected zone, and other limitations on the inner surface of fuel tank made of galvanized sheet.
分析了在不同焊接热循环条件下相应的部分易淬火钢焊缝及热影响区的显微组织。
The microstructures of weld metal and HAZ under different thermal cycle are analyzed correspondingly.
焊接板的中心裂纹处于焊缝与热影响区之间的熔合区。
Central crack for the welded plate was located in the fusion zone between welding seam and heat-affected zone.
结果表明，气侧焊缝区与近焊缝区存在很高的焊接残余应力。
The result show that there was very high welding residual stress on the welding joints and their adjacent area in the gas side.
利用该系统同时测量出焊缝高温区一点的横、纵向位移，得到该点在焊接过程中的运动轨迹。
With this system the vertical and horizontal displacements of a point in the welding high temperature area are measured at the same time and get its locus during welding.
通过时大量熔化焊接头的金相观察，研究了熔化焊接头焊缝底部附近“不均匀混合区”的形貌特征。
The appearence characteristics of the heterogenous mixture zone near the bottom of weld metal in the fusion welded joint are studied through metallographic observations of many fusion welded joints.
在排除焊接残余应力导致的裂纹闭合效应后，焊缝及热影响区疲劳裂纹扩展速率与基材相当。
Having excluded the effect of welding residual tresses on crack closure, fatigue crack growth rates of the welded join...
焊接方法为脉冲熔化极混合气体保护焊，焊接板的中心裂纹处于焊缝与热影响区之间的熔合区。
The welding method used was a PC-GMAW process with mixture gases shielding. Central crack for the welded plate was located in the fusion zone between welding seam and heat-affected zone.
焊接接头的硬度分布沿焊缝中心基本对称，焊核区硬度较高，热影响区硬度最低。
The microhardness distribution of the welded joint is along the welding line. The microhardness is higher in nugget zone, and lowest in HAZ.
文章分析了高强度X80钢管道的热影响区的软化、焊缝金属与母材的匹配及产生焊接裂纹的可能性，介绍了管道环缝焊接工艺，还列举了国外X80钢管道的焊接工程实例。
This paper analyzes the welding performances of the pipeline steel X80 including softening of heat affected zone, its matching with base material and the possibility of welding cracking. It also de…
结果表明：ZM5合金TIG焊接接头是由热影响区、部分重熔区和焊缝组成。
The results show that the TIG weld joint of ZM5 magnesium alloy is composed of heat affected zone, partially melted zone and weld metal.
平衡铁素体和奥氏体两相组织在焊缝金属和热影响区中的比例，保证焊接接头的性能，是双相不锈钢焊接的基本要求。
The basic requirement of welding the steel 2205 is that the weld metal and heat-affected zone obtain a favorable phase balance and retain the performance as the base metal after welding.
结果表明，在侧吹保护气体的条件下，激光深熔焊接能有效地避免高强度镀锌钢热影响区的软化和控制焊缝气孔及焊接接头裂纹的产生。
By adopting blowing side protective gas, the problem that gas hole was easy to form owed to evaporation of zinc and moisture of circumstances in laser...
结果表明，在侧吹保护气体的条件下，激光深熔焊接能有效地避免高强度镀锌钢热影响区的软化和控制焊缝气孔及焊接接头裂纹的产生。
By adopting blowing side protective gas, the problem that gas hole was easy to form owed to evaporation of zinc and moisture of circumstances in laser...
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