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1.箱形吊臂维修一台汽车起重机(200 t)伸缩式吊臂由于超载导致倾翻,造成基本臂与第3节吊臂均严重变形,决定采取焊修复原。(1)修前准备①吊臂材料分析为保证修理成功,须先对吊臂变形处的材料进行化学成分分析,结果如表1所示。
1. Box boom maintenance A truck crane (200 t) retractable boom due to overloading led to tipping, causing the basic arm and section 3 boom are severely deformed, decided to take the welding repair. (1) pre-preparation ① boom material analysis To ensure the successful repair, the first deformation of the material at the arm of the chemical composition analysis, the results shown in Table 1.