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随着车辆运用强度的提高,对车辆重要部件强度和耐磨性的要求也提高了。需要指出的是,1987年批准的车辆部门的生产计划中已有规定,车辆的主要摩擦件的工作表面需要硬化,以提高可靠性和延长使用寿命。这些摩擦件首先是车钩装置,转向架中央弹簧悬挂装置和制动装置。在这些部件的构件上涂上硬化层,不仅可以提高可靠性和耐久性,而且还可以节省配件,以及材料、人力和燃料—动力资源。目前,许多车辆段都是用管状焊丝对磨损的零件表面进行半自动堆焊,以保证零件在运用中所需的硬度和耐磨性。但是,并不是到处都有必要的焊接设备和焊条,而且零
As the strength of vehicles is increased, the requirements for the strength and wear resistance of important vehicle components are also raised. It should be noted that the vehicle sector approved in 1987 the production plan has been stipulated that the vehicle’s main friction parts of the work surface need to be hardened to improve reliability and extend service life. These friction members are firstly the coupler device, the bogie center spring suspension device and the brake device. Applying hardened layers to the components of these components not only increases reliability and durability, but also saves on parts, as well as materials, manpower and fuel-power resources. At present, many depots use semi-automatic welding of the surface of the worn parts with tubular welding wire to ensure the hardness and wear resistance of the parts in operation. However, not all of the necessary welding equipment and welding rods are available, and zero