Al2O3—TiB2陶瓷刀具材料的高温氧化及其对刀具耐磨性能的影响

研究了Ａｌ２Ｏ３－ＴｉＢ２陶瓷刀具材料在１０００℃下的氧化行为，用ＸＲＤ、ＳＥＭ分析了氧化后的相组成及显微结构。结果表明：Ａｌ２Ｏ３－ＴｉＢ２陶瓷材料在１０００℃空气中氧化增重符合抛物线规律；随ＴｉＢ２含量的增加，该材料的抗氧化能力下降。     

氯氢处理钛冷却器炸裂原因解析及防范措施

通过分析，有理有据的查出了钛冷却器炸裂的原因是因干氯回流与钛冷却器发生强烈化学反应所致，并提出了相应防范措施。     

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.     

Ti—Ni合金电极电化学行为的研究

用循环伏安的方法研究了Ti-Ni系合金电极电化学过程的控制步骤。结果表明,Ti-Ni合金电极的放电过程是一个主要由氢在电极内部的扩散控制的过程,放电电流主要取决于氢的扩散速度;还用微极化的方法测定了Ti-Ni电极在不同平衡电位下的交换电流密度;讨论了电极反应的可逆性。     

钛基复合材料中富钕氧化物颗粒析出行为的研究

本文研究了不同钕含量，凝固速度和熔炼工艺对富钕氧化物颗粒在Ｔｉ－Ａｌ－Ｚｒ－Ｍｏ－Ｓｉ合金基体中析出行为的影响。钕是在液态下以内氧化方式析出而构成富钕氧化物颗粒的。颗粒的体积分量，尺寸和分布受钕含量和凝固速度的影响。     

Ti,B复合细化对高温铸造铝合金（ZL—208）的作用

Ｔｉ、Ｂ复合细化使ＺＬ－２０８高温铸造铝合金的高温持久性能受到损害，对室温拉伸和疲劳性能作用不明显。     

钢包喂钛线生产20CrMnTi钢的试验

采用ＧＧＮ－２ＷＸＪ喂线机向２０ｔ钢包喂入φ１０ｍｍ钛线，喂线速度按１２０￣１３０ｍ／ｍｉｎ，钛的回收率达６５％￣８３％，平均为７３．４％，通过喂入１９０￣２０００ｍ钛线，喂线时间９０￣９５ｓ，成品钢水钛含量可稳定在０．０６％￣０．０８％，喂线前后钢包钢水平均温降速率为１６．７℃／ｍｉｎ，而还原期炉内加钛铁合金化工艺，钛的回收率为２９％￣５５％，平均为３７．５％，喂钛线工艺吨钢冶炼成本降低２８．２     

攀枝花钛资源综合利用与深度加工

无机钛酸盐产品主要用作电子陶瓷.随着高新电子产品在工业生产和人们日常生活中愈来愈广泛的应用,无机钛酸盐在当代科技领域所占据的位置也愈来愈重要.在美国、前苏联、日本、法国等国家,无机钛酸盐已发展为工业化生产,并形成了系列化产品;而我国对钛酸盐类产品的研究还很不够,远没有形成规模化生产.