超声相控阵检测技术及其应用

简述超声相控阵检测技术的发展、原理、特点及相控阵换能器的分类。介绍国外超声相控阵检测成像技术在焊缝和火车轮轴检测方面的应用。超声相控阵检测技术较常规超声波检测具有高速、高效、适合复杂结构件以及能实时成像等优点，在压力容器、核电站和海洋平台结构等工业无损检测领域具有良好的应用前景。     

EDM电极平动补偿系统的开发

研究了电火花成型加工中因电极平动所造成的加工误差 ,提出了基于NC技术的电极平动补偿方法 ,开发出EDM电极平动补偿软件系统 ,并进行了对比实验验证。实验表明 ,该系统可以有效提高EDM的加工精度     

光纤声发射传感技术的进展

介绍光纤声发射传感技术的研究现状和最新进展。综述和评价了基于强度调制、相位调制、波长调制、偏振调制和一些新型调制原理的光纤声发射传感技术，介绍了应用实例，最后提出了目前光纤声发射传感技术研究中急需解决的问题和发展趋势。     

时效处理对针状铁素体管线钢力学性能和抗硫化氢行为的影响

在600℃左右进行时效处理，可使针状铁素体管线钢强度水平大幅度提高而基本不降低韧性和延性．在600℃保温10h，针状铁素体管线钢在保持塑、韧性的基础上，强度水平提升到接近X100级别要求，且明显改善了其抗H2S开裂性能．有利作用主要归因于时效处理促进了针状铁素体中微合金碳氮化物的进一步沉淀析出，马氏体／奥氏体(M／A)岛转变成回火马氏体，以及组织更加均匀化．时效处理为发展高强度级别针状铁素体管线钢提供了新的思路。     

纳米氢氧化镁的制备与结构表征

以硫酸镁和氨水为原料,以获得纳米氢氧化镁粒子;并采用X射线和透射电镜等对颗粒形态进行表征.得出了制备纳米氢氧化镁的最佳条件.研究成果为纳米级氢氧化镁下一步的深入研究打下了良好基础.     

加工含硫原油的设备腐蚀问题与对策

 简述了加工含硫原油对设备的腐蚀问题和应采取的对策。认为应提高原料油和产品的脱硫能力，并做好工艺防腐及设备的选材工作.      

水蒸气等离子弧电极烧损机理的研究

从电弧机理和实验分析的角度对水蒸气等离子弧电极烧损机理进行了探讨，并在深入分析电极烧损机理的基础上，提出了一种能有效提高电极寿命的方法，从而为水蒸气等离子弧的应用开辟了新的途径。     

Flow behavior and microstructure evolution during hot compression of TA 15 titanium alloy

The samples of TAI 5 titanium alloy were hot compressed in the temperature range of 550-1 000 β at constant strain rate from 0.01 s^-1 to 1.0 s^-1. The flow behavior and microstructural evolution during hot deformation of TA 15 alloy were investigated, based on which the hot working parameters of TA15 alloy were selected. The results show that with the increase of deformation temperature and decrease of stain rate, the flow stress decreases gradually, but the magnitude of stress drop varies with the increase of temperature in different temperature intervals. According to the flow stress and deformation microstructure, the deformation behavior can be classified into three types as working hardening（550-600 β, α＋β phase）, dynamic recrystallization （650-900 ℃, α＋β phase） and dynamic recovery（950-1 000 ℃, β phase）. The main softening mechanism is dynamic recrystallization（DRX） of a phase in α＋β phase zone and dynamic recovery（DRV） of β phase in β phase zone. As the stain rate decreases dynamic recrystallization of a phase proceeds more adequately in α＋β zone and the β subgrains of dynamic recovery have the tendency to grow infl zone. The reasonable temperature for warm forming of TA15 alloy is in the range of 600-700 , which has been verified by warm spinning experiment of tube workpieces.：     

Hydrogen-induced hot workability in Ti-6Al-4V alloy

The effect of hydrogen on hot deformability of Ti-6Al-4V alloy was investigated by isothermal hot compression test with temperature of 800 ℃ and velocity of 0.1 mm/s. By optical microscopy （OM） and transmission electron microscopy （TEM）, the influence of hydrogen on the microstructural features was systematically examined including the morphology of a grain, volume fraction of a phase and dynamic recrystallization （DRX）. The flow stress shows an initial decrease but a later increase with the increase of hydrogen content. The minimum of peak compression flow stress is obtained when 0.2% hydrogen is added into the alloy. The hydrogen-induced softening of Ti-6Al-4V alloy may be that hydrogen induces the increase of proportion of soft β phase, the increase of DRX and the increase of extent of twins.     

氢化锂材料车削表面粗糙度预测模型的建立

文章主要介绍了运用回归分析方法建立氢化锂车削表面粗糙度预测模型的方法。通过所建立的粗糙度预测模型，研究了车削过程中切削速度、进给量、切削深度对表面粗糙度的影响。经加工试验证明了该表面粗糙度预测模型的有效性，从而实现加工前在确定切削条件下预测和控制表面粗糙度的目的。