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焊接裂纹是酿成灾难性事故的最危险的缺陷,对裂纹的研究历来是焊接科学的中心课题之一.本文利用日本岛津ASM-SX扫描电子显微镜及其波谱仪,对船用低合金高强度钢Mn-Ni-V钢和Ni-Cr-Mo-V钢焊接裂纹的性质及其产生的原因进行了分析. 一Mn-Ni-V钢焊接裂纹分析图1是σ_s=50kg/mm~2级的Mn-Ni-V钢焊接时产生的沿焊缝中心线的纵向裂纹.我们沿裂纹折开焊缝,发现断口有着明显的氧化色彩,并用扫描电镜对
Welding crack is the most dangerous defect leading to catastrophic accident, and the research on crack has always been one of the central topics of welding science.In this paper, the Shimadzu ASM-SX scanning electron microscope and its spectrometer were used to analyze the low alloy high strength Analysis of the nature of welding cracks in Mn-Ni-V steels and Ni-Cr-Mo-V steels and the causes of their formation.A crack analysis of Mn-Ni-V steels Fig.1 shows the relationship between σ_s = 50kg / Of Mn-Ni-V steel welding along the longitudinal centerline of the weld cracks along the crack we open along the weld and found that the fracture has a significant oxidation color and scanning electron microscopy