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.
通过对13 -5型马氏体不锈钢焊接接头进行等离子弧清根及碳弧气刨清根的比较，证明等离子弧清根对全焊透焊缝实施背面清根是可行的。
By comparing backgouging of plasma arc with carbon arc to the welded joint of 13-5 martensitic stainless steel, the backgouging of plasma arc is proved feasible for the full penetration weld.
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.
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.
本文测定了燃气用PE80管材热板焊接接头的蠕变柔量，研究了蠕变对焊缝裂尖应力场的影响。
In this paper, the creep compliance of Hot-plate welded joint of PE80 pipe is measured, and the effect of creep on the crack tip stress field in the weld is investigated.
多层焊和附加工艺焊缝是提高焊接接头性能的有效途径。
The properties of the welded joint may be effectively enhanced by adopting neat multi-layer welding and technical welds.
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.
由于镁合金不填丝的TIG焊接接头强度低，焊缝表面成型不好，所以，镁合金的填丝tig焊接方法不可避免。
Because TIG welded joints without filler wire always hold low strength and poor formation, tungsten inert gas welding process with filler wire is inevitable.
试验过程电弧燃烧稳定，焊接接头充分熔透，母材与焊缝连接良好，未见气孔、裂纹等缺陷。
The tests show: there are steady arc burning, fully fused weld joints, good connection between base metal and weld joint, no air bubble, cracks etc.
研究了纯镍铸铁焊条冷焊时，稀土金属镧、铈、镨、钇及钕对焊缝热裂纹敏感性的影响规律，并分析了铈对焊接接头力学性能和加工性能的影响。
The influence of Lanthanum, Cerium, Yttrium, Praseodymium and Neodymium on weld hot cracking susceptibility of the pure nickel electrode used for cold welding of cast iron was studied.
焊缝导向弯曲试验的目的是检查焊接接头的完好性和塑性以及材料的焊接工艺和表面缺陷。
The purpose of weld guide bending test is to detect plasticity of welding joint, welding process and surface defects of materials.
结果表明焊接接头裂端应力三轴性随焊缝和母材匹配性质及裂纹几何不同而变化。
The numerical results show that the stress triaxiality varies with the mis matching mode and crack geometry of welded joints.
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 .
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.
焊接接头抗拉强度大幅度提高，断裂均处在远离焊缝的母材上。
The tensile strength of welded joint is significantly improved after heat treatment and the failure occurred far away from the weld metal zone.
按目前大多数人认可的角接接头焊脚的定义，根据DL/T869—2004《火力发电厂焊接技术规程》去控制焊接尺寸，会出现焊缝有效厚度不足的问题。
The weld size was controlled according to the definition of leg on the corner joint and DL/T869—2004 (power plant welding technical regulation), which led to the effective thickness was insufficient.
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.
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.
利用扫描电子显微镜和能谱分析(EDS)对焊缝断口进行成分分析，研究焊接接头的焊接缺陷及断裂机制。
Weld fracture components were analysed by SEM and EDS, joint defect and fracture mechanism were also researched.
通过焊缝金属相变温度和残余应力测试以及焊接接头疲劳强度试验，分析了焊缝金属相变温度对焊接残余应力和焊接接头疲劳强度的影响规律。
The effect of transformation temperature of weld metal on the residual stresses and the fatigue strength of welded joints is analyzed based on their test.
研究结果表明，焊缝具有优良的强韧性匹配，焊接接头强度及冲击韧性均满足管线钢工程焊接技术条件。
The results show the weld has good properties in strength and toughness satisfying the welding demands of pipeline.
结果表明，无论是平面应变还是平面应力条件下，焊接接头J积分值都与全母材和全焊缝材料不同；
The result shows that, as the crack stands on melt line of welded joint, the values of J-integral are different from those of both all-base and all-weld metal.
焊接接头分类，焊接接头（焊缝）类型，焊接接头系数。
厚板焊接结构的角焊缝，多数情况下没必要完全焊透，但是，如果未焊透部分尺寸过大，就会使焊接接头的疲劳强度大幅度降低。
There is no need to weld the joint thoroughly for the cruciform joint. But if the dimension which is not welded is too large. that will make fatigue strength reduce.
其次通过对焊接接头质量影响因素的探讨，表明端板和焊缝对保证接头质量的重要性。
The influences on joint quality are also discussed, it is testified that importance of end-pla.
结果表明：焊接工艺参数合理，在焊接接头未发现任何焊接缺陷，焊缝质量良好；
The results show that the welding parameters were reasonable, and any welding flaws were not found, and the quality of welded joints were good.
焊接接头的拉伸试验断裂部位在焊缝。焊接HAZ熔合线附近的硬度值最高，远离熔合线硬度降低，并逐渐接近母材金属的硬度。
The tensile test fracture area locates on weld seam, and the hardness near HAZ fusion line is the highest, away from the fusion line, the hardness declines and reach the parent metal hardness.
如果应用于1英寸板厚的焊接接头 ，以下焊接符号表示的是什么焊缝类型?。
If applied to a 1 in thick weld joint, the welding symbol below describes what type of weld?
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.
比较A、B钢焊接接头，B钢接头的耐蚀性总体上优于A钢，但需要改进其焊缝金属的耐蚀性；
The corrosion resistance of B steel joint is better than that of A steel joint, but the corrosion resistance of welded joint of B steel need to be improved.
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