最新激光喇曼显微分光法

日本电子公司新近研制出灵敏度最高(居世界之首),工作性优异的JRS—SYS-TEM型激光喇曼显微分光装置.该装置由计算机、分光器和显微镜组成。本文介绍该装置的结构、特点及应用实例。1.光学系统图1示出光学系统。分光仪中激光器、分光镜、光学显微镜及CCD探测器组成。     

海德堡的最新奉献紫激光计算机直接制版技术

极胜紫激光计算机直接制版(CTP)技术是海德堡印前技术的最新成果,这一款代表着尖端技术的制版机,继承了著名的成功机型-普胜激光输出机的内鼓式结构,对于希望引入CTP技术的众多中小规模印刷公司而言,这是一条极具成本效益的捷径。 2001年12月,海德堡在澳大利亚悉尼的一个工业展上正式推出了极     

LASER CLADDED TiCN COATINGS ON THE SURFACE OF TTTANIUM

Laser cladded coatings of TiCN were produced on the surface of titanium. To obtain the optimal techniques, several conditions were tested by varying the laser scanning rate. The choice of shielding gas was also studied. The cladded coatings were then evaluated from the surface mechanics point of view based on their microhardness. The microstructure of some interesting samples was investigated by optical micrographs （OM）. The results showed that under the condition of fixed pulse frequency and pulse width, the laser scanning rate and the shielding gas are the main factors influencing the components of coatings. TiCN coatings were decompounded and oxidized during the cladding process in the condition of no shielding gas of N2. X-ray diffraction results indicated that the composite coatings composed of TiCN, TiC, Ti2N, and TiO2 were produced using appropriate techniques. The results indicated that the best condition in terms of the surface microhardness is obtained when the scanning rate is 1.5mm/s, the pulse frequency is 15Hz, the pulse width is 3.0ms, and N2 is chosen as the shielding gas. The microhardness of the composite coatings is about 1331kg · mm^-2, which is about 4 times that of the substrate. The optical micrographs indicated that the cladding zone is made up of TiCN, TiO2 and some interdendritic Ti, but the diffusion zone mainly consists of the dendrites phase, and the cladded depth is about 80μm, which is more than 2 times that of the laser nitrided sample. There were no microcracks or air bubbles in the cladded sample, which was cladded using the above optimal techniques.     

浅谈JS2102对开双面胶印机常见使用问题及解决方法

JS2102双面胶印机因印书刊文件速度快,一次完成印件正反印,而受到印刷客户的欢迎。下面我把多年来对双面胶印机印刷特殊纸张给工作造成的不便及解决的办法,机器设备出现的一些特殊维修调试问题,及维修调试时应注意的地方和解决方法作总结,供大家参考,相互交流,共同提高。