耙式吊是轧钢厂常用吊车,环形轨道又是容易磨损部件,更换环形轨时焊接工艺是影响使用寿命的主要问题。 环形轨道(见图1)系50锰钢,含碳量在0.47～0.56％之间,可焊性不好。环形轨直径5.4米,高80毫米,宽90毫米,稍带倾斜度,由于含碳量较高,淬硬倾向比16锰钢大,而且工件较厚,在刚度极大和焊条运用 Rake hanging crane is commonly used in rolling mills, the ring track is easy to wear parts, replacement of the ring when the welding process is the main issue affecting the service life. Ring track (see Figure 1) Department of 50 manganese steel, carbon content between 0.47 ~ 0.56%, poor solderability. Ring rail diameter of 5.4 meters, 80 mm high, width 90 mm, with a slight inclination, due to the higher carbon content, hardened tend to be larger than 16 manganese steel, and the workpiece is thick, extremely rigid and electrode use