The Study on the Role of the Rare Earth and the Phosphorus in the Steel

The Study on the Role of the Rare Earth and the Phosphorus in the Steel
　　Most of China’s cargo transport through the rail.Heavy rail steel is the key materials;the performance will directly affect the safety of transport.Heavy rail steel,the properties are high carbon content,high alloy elements,high requirements with the wear-resistance and yield strength.The rail with RE(BNbRE) is the new product with the use of Baotou Rare-earth resource and the international advanced technologies,with the help of CHINA ACADEMY OF RAILWAY SCIENCES and other relevant departments to make.it past the standard of Ministry of Railways and the Department Ring neodymium magnet of the metallurgical technical..large number of the rails have been tested,at present,the product is the main product for the heavy load,high speed track.As the most important components of the track structure,rail need to bear long-term and greater impact of alternating load,wear and fatigue is the main failure of the rail.If a rail brittle fracture appear in the train running,it will be serious results for the rail.not only ensuring the strength,wear resistance and anti-fatigue properties,but also it http://www.chinamagnets.biz/ must ensure that the rail has good toughness and plastic.
　　On the study of the role of Rare Earth in the heavy rail,for promoting the increased of toughness and plastic,is of great significance.In this essay,with the use of Metallographic Microscopes,X-ray Diffraction,Scanning Electron Microscopy,Micro-hardness,Transmission Electron Microscopy,Universal Tensile test Machine Detection Apparatus,we study the sample of phosphorus iron ,we found that in the pure iron,Ce-phosphorus accumulation are easy to enrich on Ring neodymium magnet the grain sector. we systemly study the role of rare earth elements La ,Ce in the heavy rail steel of microstructure and mechanical Impact properties.through experiments and analysis,we found that in heavy rail steel,sample with cerium and phosphorus are common elements in the segregation within the inclusion,Ce-phosphorus and the segregation of phosphorus influence the mechanical properties of steel by changing the particle size and pearlite-spacing.on the whole,the increase of Ce,phosphorus and rare earth elements,the fall of mechanical properties of steel.