【摘要】 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。更多还原

【Abstract】 M\-6C carbides in weld metal of a 2 25Cr\|1Mo steel welded joint after creep have been studied by observation under H\|800 TEM.Results showed that during creep M\-6C carbides precipitated from weld metal had N\|W orientation relationship with ferrite: (111)\-\{M\-6C\}∥(110)\-α;\[011)\-\{M\-6C\}∥\[001\]\-α. The other two ORs, (111)\-\{M\-6C\}∥(110)\-α; \\-\{M\-6C\}∥\\-α and (111)\-\{M\-6C\}∥(110)\-α;\\-\{M\-6C\}∥\\-α, were confirmed as variations of N\|W orientation relationship. 更多还原