论文部分内容阅读
本文用透射电镜研究了2.25Cr-1Mo 钢焊接接头蠕变后焊缝中的M6C碳化物。结果表明,高温长期蠕变促进了M6C的析出长大,从焊缝内析出的M6C与α-Fe 铁素体基体间存在N-W 位向关系,即:(111)M6C∥(110)α;[011)M6C∥[001]α。文中还讨论分析了其他两种取向关系:(111)M6C∥(110)α;[101]M6C∥[111]α及(111)M6C∥(110)α;[112]M6C∥[113]α,确认其为N-W 位向关系的两种变态表达方式。
In this paper, transmission electron microscopy was used to study the M6C carbides in the weld after creep of 2.25Cr-1Mo steel welded joints. The results show that the long-term creep at high temperature promotes the precipitation and growth of M6C. There is an N-W orientation relationship between M6C and α-Fe ferrite matrix precipitated in the weld, namely: (111) M6C∥ (110) α ; [011) M6C // [001] α. The other two orientations were also analyzed: (111) M6C // (110) α; [101] M6C∥ [111] α and (111) M6C∥ , Confirming that it is the two metamorphosis of the relationship of N-W position.