铁路货车新型中梁生产工艺研究

由于轧机尺寸的限制，目前国内只能轧制中梁型钢的一半，即乙字钢，用通长焊接方法生产中梁型钢。由于新型中梁的尺寸和性能要求所决定，单一的热轧和冷弯都难以生产。为此，研制了新型中梁的合理生产工艺，一种是热轧加热弯，另一种是热轧加冷弯。可以保证产品质量，投资不大，但是与传统工艺有明显区别，需要具有特定设备条件和良好的市场开拓精神。

Study on Production Technology of New Center Sill in Van

Center sill section is produced by Z section welding at present due to mill dimension limit. New center sill is difficult to produce with single hot rolling and cold bending because of its dimension and properties. New rational production technologies for center sill were studied, one was hot rolling and hot bending, the other was hot rolling and cold bending. The product quality can be assured and investment is lower, but it has obvious difference with traditional technology and some special equipments are demanded.