13MnNiMoNbR與00Cr19Ni10異種鋼焊接接頭的組織與性能

Microstructure and Property of 13MnNiMoNbR and 00Cr19Ni10 Dissimilar Steel Welded Joint

首先將H309L焊絲堆焊在13MnNiMoNbR鋼板坡口上, 再將堆焊后的13MnNiMoNbR鋼板與00Cr19Ni10鋼板用H308L焊絲填充焊接, 得到了13MnNiMoNbR與00Cr19Ni10異種鋼焊接接頭, 并對接頭的顯微組織及硬度進行了分析。結果表明: 13MnNiMoNbR鋼板側熔合線附近出現了粗大的鐵素體組織, 形成脫碳層, 而H309L焊縫側的奧氏體堆焊層熔合線附近出現了黑色的非常細小的碳化物析出層; 由于碳化物的析出或是固溶碳, 使H309L焊縫側增碳層處的硬度明顯升高。
At first, H309L welding wire was welded on the groove of 13MnNiMoNbR steel plate by overlaying, then 13MnNiMoNbR and 00Cr19Ni10 steel plates were connected with H308L filler wire. Microstructure and hardness of the dissimilar steel welded joint were analyzed. The results show that coarse ferrite grain appeared nearby fusion line of 13MnNiMoNbR steel plate, namely decarburized layer. However, the black and fine carbides precipitated in fusion line of austenite surfacing layer of H309L weld beam. The microhardness obviously increased because of carbide precipitation or solution carbon in recarburized layer of H309L weld beam.

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