时效处理对添加nb铁素体429型不锈钢焊缝在3% NaCl溶液中疲劳行为的影响

Q3 Materials Science Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Pub Date : 2021-01-01 DOI:10.2207/qjjws.39.158

Atsuhiro Koyama, T. Takase, Yohei Sonobe, M. Akita, T. Kakiuchi, Y. Agata, M. Nakajima, A. Saimoto, Y. Uematsu

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引用次数: 0

摘要

******** *** *********研究了时效处理对添加nb铁素体429型不锈钢焊缝在3% NaCl溶液中疲劳行为的影响。采用化学成分不同的填充金属I和II进行了429型MIG对焊。对光滑焊缝试样进行700℃、100 h时效处理后，在3% NaCl溶液中进行全反向轴向疲劳试验。在填充填料I的情况下，即使经过时效处理，焊缝的腐蚀疲劳强度也几乎没有变化。另一方面，对于填料II的焊缝，时效处理后的腐蚀疲劳强度下降。结果表明，填料II的时效处理和焊接热史的结合使焊缝母材敏化，提高了焊缝对腐蚀环境的敏感性。

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Effect of aging treatment on fatigue behavior of Nb-added ferritic stainless steel type 429 welds in 3% NaCl solution

******** *** ********* The eﬀect of aging treatment on fatigue behavior of Nb-added ferritic stainless steel type 429 welds in 3% NaCl solution was investigated. Two ﬁller metals with diﬀerent chemical compositions, Filler I and II, had been used for the MIG butt welding of type 429. After aging treatment at 700 ℃ for 100 hours was applied to the smooth specimens of the welds, the fully reversed axial fatigue tests were performed in 3% NaCl solution. In the case of the welds with Filler I, there was almost no change in corrosion fatigue strength even after aging treatment. On the other hand, in the case of the welds with Filler II, the corrosion fatigue strength decreased after aging treatment. It was concluded that the combination of aging treatment and heat history of welding using Filler II caused the sensitization of the base metal of the welds and increased the sensitivity to the corrosive environment.

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Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Materials Science-Metals and Alloys

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1.10

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0.00%

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