我厂铸造的2 t0.5m~3高锰钢挖泥斗用于日本进口的750m~3/h自航链斗式挖泥船上,斗链是由500kW电机驱动,泥斗运转速度为每分钟25～37.5次,正常挖泥深度为13m,最大挖泥深度为20m,挖掘土质的压强为0.2M Pa。在葛洲坝疏通航道工程中,由于江中多半是拳头大小的卵石,为防止挖泥时因冲击力过大而压扁泥斗,便在挖泥斗中间焊了一块30mm厚的隔板,致使挖泥时的拉力全部作用于斗脚方筋处,固此在工作了50天之后,就在20只泥斗斗脚方筋上产生了裂纹(图1)。 The 2t0.5m ~ 3 high-manganese steel dredging mills cast by our factory are used on imported 750m ~ 3 / h self-navigating bucket dredgers in Japan. The bucket chain is driven by a 500kW motor and the speed of mud hopper runs at every minute 25 ~ 37.5 times, the normal dredging depth is 13m, the maximum dredging depth is 20m, the pressure of digging soil is 0.2M Pa. In the Gezhouba dredge waterway project, because most of the river is a fist-sized pebble, in order to prevent dredging due to excessive impact and crush mud, they dug in the middle of welding a 30mm thick partition, resulting in digging Tensile force of the mud all acts on the biceps tendon, and after 50 days of operation, cracks are formed on the bones of 20 muddlings (Figure 1).