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焊缝线
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  “焊缝线”译为未确定词的双语例句
     Influence of Weld Thermal Expansion Coefficient MisMatching on the Residual Stress of Welded Joints
     焊缝线膨胀系数匹配对焊接残余应力的影响规律
短句来源
     Application of Line Scanning DR Image System to Pipe Ends of SSAW Pipe
     螺旋埋弧焊钢管管端焊缝线扫描DR成像系统的应用
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  相似匹配句对
     ONLINE
     在线
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     Weld Seam Tracing System Application of Line Matrix CCD
     线阵CCD焊缝跟踪系统的应用研究
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     Study on Welding Process of Girth Weld for Transportation Gas Pipeline
     输气管线焊缝焊接工艺研究
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     News Online
     信息在线
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     Ultrasonic Testing of Welds
     焊缝的超声波检测
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In this paper, transient stress history and residual stress distributin of welded joints are investigated by using the method of thermal elasto-plastic finite element analysis. Results of the computation show that in the weld joint longitudinal residual tensile stress in the weld center is always close to the yield strength of the weld metal when the same parent metal ( 400MPa) metal and TEC evenmatched joint are used and that the change of of value doesn't change the nature of the residual tensile stress. However,...

In this paper, transient stress history and residual stress distributin of welded joints are investigated by using the method of thermal elasto-plastic finite element analysis. Results of the computation show that in the weld joint longitudinal residual tensile stress in the weld center is always close to the yield strength of the weld metal when the same parent metal ( 400MPa) metal and TEC evenmatched joint are used and that the change of of value doesn't change the nature of the residual tensile stress. However, in the same parent metal and strength evenmatched joint, the residual stress ox in the weld center changes with TEC of the Weld metal, when the TEC of the weld metal becomes lower than that of the parent metal, the residual stress ox also gets lower, and its tensile stress in the weld center possibly becomes into compressive stress, but when the TEC of the weld metal becomes higher than that of parent metal, the stress ox could become as high as and then changes a little.

本文采用热弹塑性有限元法研究了焊缝强度匹配和线膨胀系数匹配对焊接动态应力以及残余应力分布的影响规律。计算结果表明,在相同母材(σ_s~p=400MPa)以及等胀匹配条件下(即焊缝线膨胀系数α~w=母材线膨胀系数α~p),焊缝中心纵向残余应力σ_x为拉应力,其值总是接近于焊缝金属屈服强度σ_s~w,且屈服强度的高低不会改变拉应力的性质。在等强匹配条件下(σ_s~w=σ_s~p),焊缝中心σ_x随焊缝线膨胀系数α~w的降低而降低,其性质有可能由于α~w的不断降低而由拉应力转变为压应力。而当α~w高于α~p时,焊缝中心达到σ_s~w后变化不大。

Based on the characteristics of laser welding technology, studied in this paper are the relationship between the output power and welding speed in the welding process of the core drill bit, and its influence on welding strength and surface quality of the weld Meanwhile, the material optimizing tests are conducted on three kinds of steel body materials The results show that when the output power is within 1500W~2500W and the linear energy density equals 50~100 J/mm, the weld bending strength reaches its...

Based on the characteristics of laser welding technology, studied in this paper are the relationship between the output power and welding speed in the welding process of the core drill bit, and its influence on welding strength and surface quality of the weld Meanwhile, the material optimizing tests are conducted on three kinds of steel body materials The results show that when the output power is within 1500W~2500W and the linear energy density equals 50~100 J/mm, the weld bending strength reaches its maximum, 1900 N/mm 2~2400N/mm 2, which is 3~4 times as high as the European Designing Standard for the same product Among the three tested materials for the steel body(20, 20CrMo, 28CrMo), the weld ability of 28CrMo and its strength are shown the best

本文根据激光焊接的工艺特点 ,探讨了薄壁钻头激光焊接过程中焊机输出功率和焊接速度之间的关系及其对焊缝抗弯强度和外观质量的影响 ,同时 ,对三种钻头钢体材质进行了优选试验。实验结果表明 ,有效输出功率在 15 0 0W~ 2 5 0 0W范围内、焊缝线能量密度在 5 0~ 10 0J mm之间时 ,焊接效果最佳 ,焊缝抗弯强度值可达 190 0N mm2 ~ 2 40 0N mm2 ,是该产品欧洲设计标准值的 3~ 4倍 ;在相同焊接工艺参数条件下 ,三种试验钢体材料 ( 2 0钢、2 0CrMo、2 8CrMo)中 ,2 8CrMo的激光焊接性能及其钢体强度最好。

 
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