With the increasing requirements of train running speed and carrying capacity

more stringent requirements have been put on the material and performance of the bogie welding framework.On the basis of MAG welding process

the welding technology research of bogie frame is already quite extensive and thorough.At present

although the bogie wire can meet the requirements for welding use

but there are large spatter

welding pores

welding slag and undercut etc.other defects in the process of welding

and the transient stability of small current need to be improved.There is an urgent need for new welding materials of cold-resistant and high toughness

which have excellent use of operational performance

long life

high reliability

and a wide range of environmental service consumables.In the future

new materials and new technology will be the hot spots and focuses for a long time.Light weight

environment friendliness

high reliability

long life and laser welding technology will lead to faster and better development of bogie welding manufacturing technology in the future.