400～500MPa级碳素钢先进工业化制造技术

Advanced manufacturing technology of 400～500 MPa carbon steel

利用洁净普碳钢的化学成分,通过控制轧制与轧后冷却工艺制度,可以得到内部组织均匀、细小的新一代钢材———超级钢。其成本低廉、性能优异,将成为普碳钢的换代产品。按照超级钢开发的思路,已经把与Q235成分相同的普碳钢的屈服强度提高到400～500MPa,产品应用于汽车、建筑等行业,取得了用户降低成本、生产厂多获效益的"双赢"效果。介绍了目前国内外超级钢研制、生产和应用的现状,探讨了超级钢生产中遇到的几个技术问题。

Using the same chemical compositions as those of the cleanly plain carbon steel, by means of optimizing the parameters in rolling and cooling, the super steel which has fine grain size was produced. It will become the new generation steel product because of its advantages of low cost and good properties. Following this idea, the super steel with yielding strength of 400～500 MPa has been put into mass production, and the strip coils have been used to press as the auto beams. The research and development, production and application in industry of super steel in China and outside were described. Some problems in the production of super steel were discussed.