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高强度低合金钢焊接接头的冷裂纹的形成和扩展,在很大程度上同破坏过程中的温度-时间变化和裂纹的座标变化有关。这个结论是用声发射监测得到的。用实验装置(图1)对14Х2ГМР钢(屈服强度σ_(0.2)≥60.2公斤/毫米~2)焊接接头的冷裂纹形成和扩展过程进行了试验研究,试验时采用监测仪器来测量声发射源的座标。这种监测仪器的工作原理,是测量微观和
The formation and propagation of cold cracks in high-strength, low-alloy steel welded joints are largely related to temperature-time changes and crack coordinate changes in the failure process. This conclusion is obtained by acoustic emission monitoring. The experimental device (Figure 1) was used to study the formation and propagation of cold cracks in 14Х2ГМР steel (yield strength σ0 (0.2) ≧ 60.2 kg / mm2) welded joints. The monitoring instruments were used to measure the acoustic emission sources coordinate. The working principle of this monitoring instrument is to measure the microscopic and