典型异质钢接头碳迁移与高温力学性能
发布时间：2018-10-29 21:52
【摘要】：针对A102焊接典型异种接头的碳迁移现象以及高温力学性能进行研究,利用由菲克定律推导出的碳扩散理论计算公式对扩散过程进行计算并绘制理论曲线.通过碳的成分分析绘制出实际碳扩散曲线,对熔合线两侧的组织进行观察.结果表明:理论碳扩散曲线与实际碳扩散曲线基本相同.对于A102焊接的15Cr MoR珠光体耐热钢与316奥氏体不锈钢异质钢接头而言,熔合线的不锈钢焊缝金属一侧出现增碳层,组织主要为碳化物和马氏体,而15Cr MoR热影响区一侧出现脱碳层,组织主要为铁素体.蠕变试件在熔合线脱碳层附近发生断裂,断裂方式为韧窝断裂.
[Abstract]:The carbon migration phenomena and high temperature mechanical properties of typical A102 welded dissimilar joints were studied. The diffusion process was calculated and the theoretical curves were drawn by using the carbon diffusion theory formula derived from Fick's law. The actual carbon diffusion curve was drawn by carbon composition analysis and the microstructure on both sides of the fusion line was observed. The results show that the theoretical carbon diffusion curve is basically the same as the actual carbon diffusion curve. For the joints of 15Cr MoR pearlite heat resistant steel and 316 austenitic stainless steel heterogeneity steel welded by A102, carburized layer appeared on the weld metal side of the weld metal of fusion line, and the microstructure was mainly carbides and martensite, while decarburized layer appeared on the side of 15Cr MoR heat affected zone. The tissue is mainly ferrite. The creep specimen is fractured near the decarburized layer of fusion line, and the fracture mode is dimple fracture.
【作者单位】： 沈阳工业大学材料科学与工程学院;
【基金】：国家自然科学基金资助项目(51301112)
【分类号】：TG407
[Abstract]:The carbon migration phenomena and high temperature mechanical properties of typical A102 welded dissimilar joints were studied. The diffusion process was calculated and the theoretical curves were drawn by using the carbon diffusion theory formula derived from Fick's law. The actual carbon diffusion curve was drawn by carbon composition analysis and the microstructure on both sides of the fusion line was observed. The results show that the theoretical carbon diffusion curve is basically the same as the actual carbon diffusion curve. For the joints of 15Cr MoR pearlite heat resistant steel and 316 austenitic stainless steel heterogeneity steel welded by A102, carburized layer appeared on the weld metal side of the weld metal of fusion line, and the microstructure was mainly carbides and martensite, while decarburized layer appeared on the side of 15Cr MoR heat affected zone. The tissue is mainly ferrite. The creep specimen is fractured near the decarburized layer of fusion line, and the fracture mode is dimple fracture.
【作者单位】： 沈阳工业大学材料科学与工程学院;
【基金】：国家自然科学基金资助项目(51301112)
【分类号】：TG407
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