• The result shows that the velocity field changes with the increase of space from shoulder and stir tool and the flow of weld metal from top to bottom and stir zone to rotation zone also weakens.

    实验结果表明随着轴肩搅拌针距离增大速度开始减弱,焊缝金属面向底面、由搅拌旋转区的流动随之减弱。

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  • The main region of invalidation of the weld joint between different steels is commonly in fusion zone during welding or serving.

    异种焊接接头焊接时或使用期间,发生失效主要区域通常熔合

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  • The microstructure and fine structure of weld fusion zone for high strength fine grain steel were studied.

    研究强度晶粒碳素钢焊接接头熔合附近显微组织精细结构

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  • The concept of "weld bead heat affected zone"(WBHAZ) was proposed.

    提出影响概念

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  • Improvement of elongation of joint is related to weaker cool deformation degree of heat affect zone (HAZ) and uniformity of strength and stress level between weld and base metal.

    接头延伸改善影响变形程度减弱焊缝强度应力水平同母材趋于一致有很大关系

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  • Through the analysis of elements affecting the rough crystal zone in pipeline steel weld, it raises the flexing direction of rough crystal zone of pipeline steel.

    通过管线焊接韧性影响因素分析提出了管线钢粗晶区的韧方向

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  • Original preheating temperature: the temperature of the workpiece in the weld zone immediately prior to any welding operation.

    初始预热温度是指任何焊接操作开始之前焊接区域工件瞬时温度。

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  • Metallurgical tests of cross-sectional weld samples indicate a minimal heat-affected zone that is identical to the parent metal.

    样品金相检验表明,成品的最小热影响与母体金属完全相同。

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  • The fracture rod has cracks in the microstructure of weld zone, intergranular cracks exists in the coarse grain zone of the weld heat affected zone.

    进一步比较断裂拉杆已经产生裂纹拉杆焊缝区的显微组织,发现焊缝影响存在沿裂纹。

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  • Using the heat of welding to vapour water, cooling rates are lowered on the weld bead and heat -affected zone.

    利用焊接加热使汽化,不仅使焊道而且使影响区的冷却速度减慢。

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  • After solution treatment, the weld grains become coarse along with a large amount of granular precipitates dispersed in weld zone and base metal zones.

    经过处理后,焊缝组织晶粒大,焊缝母材弥散分布大量颗粒状析出物。

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  • The Charpy impact test of base metal, weld and heat affected zone of X80 grade pipeline steel of certain factory was conducted, and its effective grain was researched.

    x 80高管线母材、焊缝影响进行比冲击韧性试验,对有效晶粒进行了研究。

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  • 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.

    通过螺旋埋弧焊管内焊缝成型焊接过程分析指出焊缝裂纹产生焊接熔池脆性温度

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  • Results After stress-corrosion test, there was no discoloration in the weld zone of the laser-welded cast samples.

    不进行应力腐蚀试验激光焊接试样作为对照组。

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  • 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.

    通过分析l 245埋弧焊焊缝质量微观组织拉伸性能关系表明焊接工艺参数合理制定低合金钢l 245管产生裂纹等缺陷的关键因素

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  • The influence of weld heating on microstructure of heat affected zone was investigated in this paper.

    探讨了焊接加热影响组织影响

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  • Micro characteristic of cracks propagation research: the path of crack propagation in the heat-affected zone and weld metal is the mix of transgranular and intergranular.

    裂纹扩展微观特征研究热影响区焊缝区的裂纹扩展均为沿晶与穿混合型。

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  • It is found that the weld of fine grain steel break apart from heat effect zone in the tensile test.

    经实验发现晶粒碳钢焊接接头拉伸试验断口远离影响区的母材上。

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  • The paper studies the fatigue failure probabilistic model of the weld zone in welded joint using probabilistic fracture mechanics and reliabilitistic analysis methods.

    本文采用概率断裂力学方法可靠性分析方法,针对压力容器焊接接头组织不均匀特点,研究焊缝疲劳失效概率模型

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  • Recognizing that the solubility of gas is greater in the liquid state than in the solid state, the subject of weld porosity is relevant to fusion zone discussion.

    认识溶解度气体更大的,液体状态固体状态下,焊缝孔隙率相关熔合区的讨论。

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  • It was found that with the increasing of carbon content, the martensite layer the weld bond disappeared, and the sawtooth-like of the partially melted zone widened.

    结果发现随含量增加熔合区中的类马氏体层消失,呈锯齿状部分熔合增宽。

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  • The fatigue crack growth (FCG) behavior of the weld heat-affected zone of 14MnNbq bridge steel was systematically investigated in this paper.

    从最弱链模型物理本质出发,探讨了影响焊接热影响脆性断裂的主要因素。

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  • The fracture toughness of the weld metal is lower than that of the base metal and the fracture toughness of heat-affected zone (HAZ) is intervenient between those of weld metal and base metal.

    接头焊缝金属断裂度显著低于母材,影响断裂韧度介于母材和焊缝金属之间。

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  • Using the finite element method, a mathematical model of temperature field for weld-repaired zone of white cast iron is constructed, and temperature field and heat cycle are analyzed.

    应用有限元方法建立白口铸铁焊接接头焊补温度数学模型,对白口铸铁焊补温度场循环进行了分析。

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  • 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.

    从而避免了传统电镀锌板直接焊接成型油箱表面、焊缝影响烧损缺陷

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  • The weld zone is the weakest in welded joint due to effects of chemical components of filler and crystallization process.

    焊丝合金化学成分结晶过程影响焊缝合金接头薄弱环节。

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  • The result shows that the fracture mode is low stress brittle fracture. The fracture is mainly caused by needle type martensite in the heat affected zone of the weld joint.

    结果表明连接杆焊缝附近影响存在大量针状马氏体组织,在应力的作用下,导致材料发生脆性断裂

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  • 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.

    通过大量熔化焊接金相观察研究了熔化焊接头焊缝底部附近不均匀混合”的形貌特征

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  • The results show that microstructure of weld zone greatly changes in the radial direction.

    结果表明焊缝组织沿径向有较大变化

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  • Stress-strain tests show that: the weld residual stress and the fusion zone is relatively concentrated, the residual stress of the heat affected zone is relatively small.

    应力应变测试表明焊缝熔合残余应力比较集中地方,影响区的残余应力比较

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