Research on online texture measurements in metal rolling field

In rolled strip material, the orientation of the crystallites, known as texture, is influenced by various kinds of thermo-mechanical processes, such as casting, plastic deformation, annealing and phase transformation. The modern industry production requires stable product performance, real-time monitoring and full controlling of the quality. The online texture measurement in metal rolling can be used to real-time monitor the whole process, and then feedback control to the production process can be implied to adjust the process parameters to ensure the stability of the products. The principles, advantages and disadvantages of related detection methods (2D X-ray diffraction, neutron diffraction, laser-ultrasonics and electromagnetic acoustic transducers (EMAT)) and the possibility of online measurement are discussed. Finally, 2D X-ray diffraction and laser-ultrasonics are employed on online texture measurement, and the schemes of online texture measurement are proposed.     

CNG客车燃气系统安全性研究

基于环保和能源结构调整的需要,很多城市都把发展天然气汽车作为一件利国利民的大事来抓,因而,近年来在全国发展很快,北京公交近几年来,在天然气客车的制造和使用上也取得了令人瞩目的成绩.