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首页> 外文期刊>Welding International >Creep strength of welded joints in steam lines with weld defects: results of bench tests on full-sized welded pipe models with the effects
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Creep strength of welded joints in steam lines with weld defects: results of bench tests on full-sized welded pipe models with the effects

机译：带有焊接缺陷的蒸汽管线中的焊接接头的蠕变强度：全尺寸焊接管模型的台架试验结果与影响

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In this study, investigations were carried out into the creep strength of welded joints with defects and the relationships of crack propagation in creep conditions in bench tests of welded pipe models with the diameter of 219 mm, wall thickness 28 mm, made of 12Kh1MF steel in relation to the dimensions and shape of initial technological defects (TD) with the variation of the permissible size (depth) of a crack in the weld metal of 09Kh1MF steel. The welded pipe models 630 mm long included up to eight reference longitudinal welded joints (Figure 1), produced by manual multipass arc welding with preheat-ing made with electrodes E-09KhlMF. After welding, the welded joints were subjected to high-temperature temper-ing in accordance with RD 153-34.1, 1-003-01 (RTM-1s). The chemical composition of the parent and deposited metals corresponded to the standard requirements on 12Kh1MF steel and E-09K1MF electrodes.
机译：在这项研究中，对直径为219 mm，壁厚为28 mm，由12Kh1MF钢制成的焊接管模型的台架试验进行了研究，研究了具有缺陷的焊接接头的蠕变强度以及蠕变条件下裂纹扩展的关系。与初始技术缺陷（TD）的尺寸和形状的关系，以及09Kh1MF钢的焊接金属中允许的裂纹尺寸（深度）的变化。 630毫米长的焊接管型号包括多达八个参考纵向焊接接头（图1），这些焊接接头是通过手动多道弧焊并通过电极E-09KhlMF进行预热而制成的。焊接后，根据RD 153-34.1，1-003-01（RTM-1s）对焊接接头进行高温回火。母体和沉积金属的化学成分符合12Kh1MF钢和E-09K1MF电极的标准要求。

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