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多层焊     
相关语句
  multi-layer welding
     Influence of Multi-layer Welding on Morphology of Cr5Mo-A302 Dissimilar Steels Welded Bond
     多层焊对Cr5Mo-奥302异种钢焊接熔合区形态的影响
短句来源
     Research on pipeline multi-layer welding tracking control system with PLC
     基于PLC的管道多层焊跟踪控制系统研究
短句来源
     This paper studies the effect of multi-layer welding on microstructural change and M23C6 precipita-tion in austenltic stainless steel weld metal by means of the scanning electron microscope (SEM)and transmission electron microscope(TEM).
     利用扫描电镜和透射电镜技术系统地研究了多层焊对奥氏体不锈钢焊缝组织变化和M_(23)C_6碳化物析出规律的影响。
短句来源
     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。
短句来源
     THE STRUCTURE ANALYSIS ON FULL CIRCUMFERENCE PULSE TIG WELDING AND MULTI-LAYER WELDING FOR SMALL DIAMETER STEEL PIPE
     小口径钢管全位置脉冲TIG多层焊的组织分析
短句来源
更多       
  multilayer welding
     Gas Pores Distribution in Titanium Welds and Effect of the Multilayer Welding on Formation of G-as Pores
     钛焊缝气孔分布及多层焊对气孔的影响
短句来源
     It is an effective way to improve the properties of HAZ by adopting multilayer welding and technical weld.
     多层焊和工艺焊缝是改善HAZ性能的有效途径。
短句来源
     The pipeline multilayer welding tracking control system can acquire the seam graph with CCD,and control the traveller by computer. The track algorithm and PLC program design realize the seam auto tracking of thick-plate of multilayer welding.
     管道多层焊视觉图像跟踪系统采用CCD获取焊缝区域图像,通过计算机处理控制行走机构,设计的跟踪算法及相应的PLC软件程序设计实现了厚板多层焊的焊缝自动跟踪。
短句来源
     In order to get the optimizing scheme of T type joint's welding sequence, the effect of welding sequence on welding residual stress field of T joint is simulated from the view of multibead welding, subsection welding and multilayer welding on the basis of ensuring reasonable welding heat source and establishing the finite model.
     为了得到T形接头焊接顺序的优化方案,在确定合理的焊接热源形式以及建立有限元模型的基础上,利用单元死活技术从多道焊、分段焊与多层焊的角度对焊接顺序对T形接头焊接残余应力场的影响进行数值分析。
短句来源
     In the multilayer welding process, the method of symmetry welding gets the minimum residual tensile stress.
     在多层焊的过程中,采用对称施焊的方法得到的焊接残余拉应力峰值是最小的。
短句来源
  multi pass welding
     The relation between the residual stress and heated band width in multi pass welding behaves in the latter type.
     多层焊形式下的残余应力与加热宽度的关系表现为后一种型式 .
短句来源
  multi-pass welding
     The results of fractographic investigation with SEM and EPMA on the weld metal solidification crack of A1-4. 5Cu-Si-Mg alloy and its liquation crack during multi-pass welding are presented.
     本文用扫描电子显微镜及电子探针对Al—4.5Cu—Si—Mg合金焊缝金属结晶裂缝及多层焊时产生的液化裂缝断口进行了研究。
短句来源
     Angle distortion modeling and prediction with computer for heavy plate multi-pass welding are carried out during condenser fabrication for nuclear power station.
     对核电凝汽器制造中的大拼板多层焊后的角变形进行了计算机预测.
短句来源

 

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  multilayer welding
Effect of multilayer welding on the structure of the heat-affected zone in medium-alloy steels
      
1.After thermal cycling to simulate multilayer welding, the structure of medium-alloy bainitic steels (14Kh2N3MA) does not differ from that of samples subjected to a single-layer welding cycle.
      
After the thermal cycle simulating multilayer welding one observes only an increase in the etchability of austenite grain boundaries in reagents containing picric acid.
      
  multi-pass welding
The multi-pass welding procedures and their associated thermal cycles produced very complex martensitic-bainitic type microstructures.
      
There is a relatively low probability of defects, especially in comparison to the multi-pass welding process used in offshore welding.
      
  其他


This paper studies the relationship between the toughness and fine microstructuresof M-A constituents in the multipass TIG welding of 15CrMoV Steel under restrainedand non-restrained conditions.It is found thai the restrained condition gives rise tobetter HAZ toughness,due to less M-A constituents,less twin martensite but moredislocation martensite in M-A constituents,higher dislocation density in ferrite and largeramount of V_4C_3 fine carbides precipitated from matrix.

本文研究了5CrMoV 钢拘束与非拘束TIG 多层焊近缝区组织,特别是M-A岛状组织精细结构与韧性的对应关系。研究结果证明:拘束接头的韧性高于非拘束接头的韧性。主要原因是拘束接头的M-A 岛状组织数量少,岛内孪晶马氏体少而位错马氏体多,铁素体基体的位错密度高以及有极细的碳化物(直径约200×10~(-10)m)从基体上弥散析出。

Influence of N and Ni contents on structure and properties of HAZ of 25 % Cr Type duplex stainless steels were studied in this paper. Weld thermal cycle simulation was used to reproduce the structure in the HAZ of single run and multi-layer welding. The test results show when the phase ratio α/γ=50/50 in the base metal the HAZ is sound α+γ duplex structure and the base metal and HAZ have the best synthetical properties. It is an effective way to improve the properties of HAZ by adopting multilayer welding and...

Influence of N and Ni contents on structure and properties of HAZ of 25 % Cr Type duplex stainless steels were studied in this paper. Weld thermal cycle simulation was used to reproduce the structure in the HAZ of single run and multi-layer welding. The test results show when the phase ratio α/γ=50/50 in the base metal the HAZ is sound α+γ duplex structure and the base metal and HAZ have the best synthetical properties. It is an effective way to improve the properties of HAZ by adopting multilayer welding and technical weld.

本文就N、Ni含量对25%Cr型双相不锈钢HAZ的组织和性能的影响进行了研究。采用焊接热模拟再现了单道焊和多层焊HAZ的组织。试验结果表明,母材的两相比例为50/50时HAZ为健全的α+γ双相组织,母材及其HAZ具有最佳的综合性能。多层焊和工艺焊缝是改善HAZ性能的有效途径。

In this paper, the fracture toughness properties of thick weldment on a quenched and tempered DQTHT80 steel was investigated. The testing results show that the post weld heat treatment (PWHT) deteriorates the toughnees of HAZ of the studied steel.Ductile fructure and cleavage fracture were observed respectively in HAZ for as-welede and post weld heat treated specimens.Moreover,the toughness drop after PWHT was proved by simulation tests on coarse grain zone.

研究了直接淬火回火调质钢DQTHT80多层焊热影响区的CTOD断裂韧性。焊态和焊后热处理状态下的试验结果表明:焊态下热影响区断裂韧性高于焊后热处理态。焊后热处理降低了该钢热影响区的断裂韧性。焊态下断口呈韧窝状,而焊后热处理断口呈解理状。模拟焊接热影响区粗晶区试验结果进一步证实了焊后热处理对韧性的不利影响。

 
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