钢水氧含量与钢水处理质量的关系

连铸钢的理化性能，以及成品使用性能，在极大程度上取决于非金属夹杂中的氧浓度。氧浓度首先取决于采用脱氧、变性处理、吹隋气的工艺，及浇铸前钢水炉外处理所有工艺进行的效果。本文以20钢为例，查明了总的氧浓度与夹杂物污染度和炉外处理工艺参数的关系，即与渣和钢水的氧化度(铝浓度)、温度等的关系。     

集成智能传感器的进展

集成智能传感器的进展ＬｏｈａｎＨ、Ｈｕｉｊｓｉｎｇ等１．引言继工业革命和信息革命之后正在到来的自动化革命需要许多传感器。在许多传感器应用中，最大的问题是各种传感器有其自己的特殊性。有些传感器提供输出电压，有些是电流，或电阻，或电容。本文目的是说明如何...     

基于模糊逻辑的人员雇用计划─—适用于面向需求和员工的人员雇用

由于受到市场的压力，各个行业和各种等级的企业越来越多地被迫充分发挥其现有的弹性潜力。弹性劳工雇用模式的新规定，作为符合需求作业时间的先决条件，是这方面的重要推动力，它由立法人和劳资双方在近期内所提出。在此，描述了一个人员计划系统，该系统使弹性潜力有利于为企业增强实力，以及为员工走向自组织拥有更多的自由空间提供机会。     

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.