The integration of custom steel

Cold-formed steel refers to finished steel with various cross-sections of a sheet or strip that is bent in a cold state.Cold-formed steel section is a kind of economical thin-walled steel section,also known as steel cooling bending profiles or cold-formed profiles.Cold-formed steel is the main material for making light steel structure.It has a variety of extra thin,reasonable shape and complex cross sections which can not be produced by hot rolling.Compared with the hot-rolled section steel,under the same section area,the radius of rotation can be increased by 50~60%,and the moment of inertia of section can be increased by 0.5~3.0 times,so the material strength can be used more reasonably.Compared with the ordinary steel structure(that is,the steel structure made by the traditional I-beam,channel,Angle and steel plate),the steel can be saved by about 30~50%.

According to foreign information,there are 67 kinds of cold-formed steel for railway vehicles,and the amount of each truck is 4.7 tons.It accounts for 20%of the weight of the carriage.And the use of 18~20 varieties in China,each carriage consumption of 1.2 tons,accounting for 5.2%of the weight of the carriage.Each rolling stock plant should maximize the use of cold formed steel in the design,and give full play to the characteristics of light,thin wall and cold formed steel.