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通过对焊接贝氏体奥氏体钢管贝氏体钢侧显微组织变化和残余应力分布对巴克豪森噪声（ＢＮ）影响的研究表明，随着离焊缝距离的增加，显微组织可分为４个区域：粗大板条贝氏体加少量板条马氏体区，均匀细小的粒状贝氏体区（正火区），较粗粒状贝氏体区和原始粒状贝氏体区。其轴向残余应力逐渐减小，周向残余应力的分布特征不明显。焊接贝氏体奥氏体过热器管贝氏体钢侧焊缝附近易出现开裂，与其粗大的显微组织及残余张应力状态密切相关。
The study on the influence of Barkhausen noise (BN) on the bainitic-austenitic steel bainitic steel microstructure and residual stress distribution shows that with the increase of the distance from the weld, the microstructure Divided into four regions: thick lath bainite plus a small amount of lath martensite, uniform fine granular bainite (normalizing zone), coarser granular bainite zone and the original granular bainite zone. The axial residual stress decreases gradually, and the distribution of residual stress in the circumferential direction is not obvious. Welded bainite austenite superheater tube bainitic steel near the weld prone to cracking, and its coarse microstructure and residual tensile stress is closely related to the state.