选取TA2纯钛为研究对象,在箱式电阻炉中进行不同温度与不同时间的热氧化处理,研究了不同工艺热氧化处理试样在36%~38%HCl(室温)和30%H2O2(36.5℃)中的耐腐蚀性。采用扫描电子显微镜(SEM)观察了热氧化处理试样表面形貌,XRD进行了物相分析,用电子天平称重。研究结果表明,TA2纯钛在600℃以上热氧化处理在其表面形成了比原始态更厚的金红石型TiO2氧化膜,且TiO2氧化膜随热氧化温度升高而加厚;热氧化后TA2试样在36%~38%HCl和30%H2O2中耐腐蚀性明显改善,改善TA2耐蚀性的最佳热氧化工艺条件为:热氧化温度700℃;热氧化时间330~500 min。

Commercially pure titanium ( CP-Ti) TA2 samples were subjected to thermal oxidation ( TO) treatment at different temperature .The morphological feature , structural characteristics and weight of thermally oxidized samples were studied by scanning electron microscope (SEM), X-ray diffraction(XRD) and electronic balance.The corrosion resistance of thermally oxidized samples in 36%~38% HCl ( room temperature ) and 30% H2 O2 ( 36.5 ℃) were investigated .The results show that , when the TO temperature is above 600 ℃, the oxidized layer is composed of TiO2 , and the thickness of TiO 2 oxidized layer increases with the temperature increased .And the corrosion resistance in HCl and H 2 O2 increases significantly after TO treatment , and the optimum TO condition is treating temperature of 700 ℃and duration of 330~500 min.

采用恒温箱氧化法，将三羟甲基丙烷油酸酯（TMPTO）基础油分别在不同温度下（95、135、175、250℃）进行连续氧化，测试不同氧化时间下TMPTO的运动黏度和总酸值，获得其热氧化行为与氧化温度和氧化时间的定量关系；运用红外光谱法和差示扫描量热法对TMPTO不同氧化时间下的热氧化产物和性能进行分析，探讨其热氧化规律。结果表明：在一定温度下，随着热氧化时间的延长，TMPTO基础油运动黏度的对数和总酸值呈线性增加关系，热氧化温度越高，线性斜率越大；随着温度的升高，氧化时间的增加，TMPTO基础油的氧化诱导温度降低；FTIR分析表明TMPTO基础油在氧化过程中产生了氢过氧化物以及醇类产物。

The trimethylolpropane trioleate(TMPTO)synthetic lubricant was oxidized by the oven under 95,135,175 and 250 ℃,the kinematic viscosity and acid value of TMPTO were tested at different oxidation time responsively.By fitting the curves of kinematic viscosity and total acid number with oxidation time at different oxidation temperatures,the relation-ship between thermal oxidative behavior,the oxidative time and the oxidative temperature was determined.The thermal oxi-dation products and their performances of TMPTO at different oxidation time were determined by FTIR and DSC.The re-sults suggest that the total acid number and the logarithm of kinematic viscosity of TMPTO synthetic lubricant tend to in-crease linearly with the oxidation time at a certain temperature,and the linear slope is bigger with the oxidation temperature increasing.The oxidative inducing temperature of TMPTO is reduced with the increase of oxidation temperature and oxida-tion time.FTIR analysis indicates that

钛及钛合金具有良好的综合性能,但是由于本身的磨损性能差、生物活性低等缺点限制了其在某些方面的应用,而热氧化处理是近年来一种简单有效的提高钛及钛合金表面性能的改性方法。本文介绍了热氧化处理的基本原理和工艺,概述了纯钛及钛合金的热氧化处理工艺现状,分析了影响热氧化工艺的因素,并对纯钛及钛合金的热氧化工艺前景作了展望。

Titanium and titanium alloys with excellent comprehensive performance are limited in the application of some fields,owing to their poor wear resistance ,bioactivity and so on.In recent years,thermal oxidation (TO) treatment is an effective surface modification method to improve the surface properties of titanium and its alloys.In this paper,the basic thermal oxidation principle and processes are introduced;thermal oxidation treatments of titanium and titanium alloys are summarized in terms of the research significance and the impact factors of thermal oxidation are discussed.The present status and prospect of thermal oxidation of titanium and its alloys are put forward.

热氧化处理可改善医用钛合金耐磨损、耐腐蚀及生物活性等性能，为研发新一代人工关节耐磨涂层提供了希望。结合笔者研究结果探索了热氧化钛合金的薄膜生长机理及工艺参数优化，综述了热氧化处理对医用钛合金耐磨损、耐腐蚀及生物活性改进的研究进展，最后对氧化膜失效机理及发展趋势进行了总结和展望。

The thermal oxidation treatment can improve the wear resistance, corrosion resistance and biological activity of medical titanium alloy and provides new hope for the development of the long lifetime artificial joints. The coating growth mechanism and process parameters optimization of thermally oxidized titanium alloy were studied based on our research results. Then, the research progress on the improvement of wear resistance, corrosion resistance and biological activity of thermally oxidized biomedical titanium alloy was reviewed. Finally, the failure mechanism and development trend were summarized and prospected.

传统的生物氧化预处理过程温度控制算法参数整定过程复杂,且受干扰后会使控制漂离最佳状态。针对这一问题,以某金矿生物氧化预处理工艺为研究背景,分析了氧化槽内生物氧化反应热、冷/水阀循环热、氧化槽与外界发生热传递的流失热之间的平衡关系,构建了以冷/热水调节阀开度为控制目标,以环境温度、矿浆温度、冷/热水水温为状态参数的温度控制模型。经过验证,该模型有效地解决了传统温度控制系统存在的问题,实现了氧化槽温度的稳定控制。

The parameter tuning process of temperature control algorithm in conventional biological oxidation pretreatment process is complicated. The control effect of the temperature control algorithm is easily drifted away from the best state after being interfered. A bio-oxidation pretreatment process was used as research background. The bio-oxidation reaction heat of oxidation tank, the cycle heat of hot/cold water valve and the balance of heat loss between oxidation tank and the outside world were analyzed. Through the analysis a temperature control model was established. Hot/cold water valve opening degree is the control target in the proposed model. Ambient temperature, slurry temperature and hot/cold water temperature are the state parameters. The results of simulation proved that the model has effectively solved the traditional problems of temperature control system and achieved a stable temperature control of the oxidation tank.