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对道路桥梁工程用钢进行了振动焊接处理,研究了振动加速度、焊接热输入对焊接接头组织与性能的影响。结果表明,当较小热输入(22.8 k J/cm)配合较大的振动加速度(15 m/s2)和较大热输入(31.6 k J/cm)配合较小的振动加速度(5 m/s2)时,可使焊接接头具有较高的冲击韧性;0 m/s2时热输入越小阻尼越大,6 m/s2时随着应变幅度的增加较大热输入条件下的试样的阻尼明显增加,10 m/s2时中等热输入条件下的试样的阻尼随着应变幅度的增加最先达到峰值,15 m/s2时小热输入条件下的试样的阻尼随应变幅度增加最快。
Vibration welding of road-bridge steel was carried out, and the influence of vibration acceleration and welding heat input on the microstructure and properties of welded joint was studied. The results show that when the smaller heat input (22.8 kJ / cm) combined with larger vibration acceleration (15 m / s2) and larger heat input (31.6 kJ / cm) ), The weld joint can have higher impact toughness; the smaller the heat input at 0 m / s2, the larger the damping, and the larger the strain amplitude at 6 m / s2. The damping of the sample under the heat input condition is obvious The damping of the sample with medium heat input at 10 m / s2 first peaked with the increase of strain amplitude. The damping of the sample with small heat input at 15 m / s2 increased fastest with the strain amplitude.