Q355NHD耐候H型钢生产实践

Production Practice on Q355NHD Weathering H-steel

基于耐候钢生产技术难点,详细分析论述了首钢长治钢铁公司Q355NHD耐候H型钢的生产工序、加热工序、轧制工序和检测方法。检测表明:成品钢材表面无裂纹,化学成分、力学性能等指标满足国家标准,表现出优良的耐大气腐蚀性能,是一种具有广阔前景的绿色钢材。基于生产实践基础上的改造,可推广至其它耐候钢生产过程。

The production process,heating process,rolling process and inspection method of Q355NHDweathering H-steel by Shougang Changzhi Iron&Steel Co.,Ltd.are described in detail based on theproduction technological difficulties of weathering steel.Inspection shows that,the surface of finishedsteel has no crack,and indexes such as chemical composition as well as mechanical properties meet thenational standard,showing excellent resistance to atmospheric corrosion,being a kind of eco-friendlysteel with broad prospect.On the basis of such a production practice,it can also be extended to otherweathering steel production process.