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异种钢焊接接头运行一段时间后，存在失效的问题。通过对１２Ｃｒ２ＭｏＷＶＢ（钢１０２）与ＴＰ３４７Ｈ不锈钢异种钢焊接接头的钢１０２与焊缝交界的熔合线和过热区组织的分析，并对该区域的碳化物经过不同时效时间之后聚集长大的情况的研究表明：现场运行中在应力及温度的作用下，最终将造成该区域晶界或晶内碳化物不断析出和长大，连接起来可能形成微孔引起失效。
Dissimilar steel welded joints run for some time, there is the problem of failure. Through the analysis of the microstructure of the weld line and overheat zone at the interface between steel 102 and welded seam of stainless steel dissimilar steel of 12Cr2MoWVB (steel 102) and TP347H, and the study on the situation of carbide aggregation and growth in this area after different aging time It is indicated that under the action of stress and temperature in field operation, the grain boundaries or intragranular carbides in the region will eventually precipitate and grow up, and the micropores may be connected to cause failure.