Modern Microalloyed Steels

摘要：

The addition of microalloying elements (MAE) to low C-Mn-Si HSLA steels has led to many benefits to the producers, fabricators and end-users. Microstructural improvements such as microstructural refinement, higher dislocation and sub-grain boundary densities and finer M-A-C distributions have led to higher strength, improved toughness and better formability. These improvements can often be traced to the MA addition. In steels for load-bearing applications, the combination of MAE with hardenability additions (Cr, Mo, B, etc.) and lower transformation temperatures has led to much higher strength levels than what were available a few years ago. The resulting non-polygonal, bainitic and martensitic ferrite microstructures have not only higher strengths but also adequate levels of improved ductility and toughness. Hot strip,plate and pipe applications have benefitted from these developments. Similar improvements have been found in the microalloyed forging steels, where the change from pearlite-ferrite to bainitic ferrite microstructures has led to higher strengths and improved high-cycle fatigue resistance, with little penalty in ductility and toughness. In the cold rolled gauges, both the so-called Advanced High Strength Steels(DP, TRIP and Complex Phase Steels) and the martensitic directquenched and press-quenched steels, along with the Interstitial-Free steels, have benefited from MAE additions, especially in the very popular zinc-coated sheet form. This paper will briefly review each of these topic areas, and the underlying physical metallurgy will be discussed.

关键词： Microalloying Vanadium HSLA Steels Bainite, Linepipe Thermomechanical Processing

作者: GARCIA,C.Issac SUIKKANEN,Pasi P. HUA,Mingjian Anthony J

作者单位: Basic Metals Processing Research Institute,Department of Mechanical Engineering and Materials Scienc Department of Mechanical Engineering,University of Oulu,Box 4200,90014 Oulu, Finland Basic Metals Processing Research Institute, Department of Mechanical Engineering and Materials Scien Basic Metals Processing Research Institute, Department of Mechanical Engineering and Materials Scien

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 102-108

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）