Ti—Al二元合金的成分对组织和力学性能的影响

用金相、扫描电镜和X射线衍射研究了6种不同Al含量Ti-Al二元合金铸态和退火态的组织结构和相组成的特征和变化。从结晶动力学的观点,分析了合金的结晶凝固过程。采用三点弯曲方法研究了合金的抗弯性能同Al含量的关系。结果表明,Al含量为34 wt%,经1100℃/30 h退火的合金抗弯性能最好,Al含量偏离34wt%,都对合金的力学性能不利。     

灰铁铸件牌号要求与熔炼配料选择

由于铸件壁厚对其性能有明显影响，牌号要求相同、壁厚不同的灰铁铸件必须采用不同的成分和配料。介绍不同灰铁铸件牌号标准的对照，并用生产实例说明如何根据图纸牌号要求、铸件结构和使用性能要求选择化学成分控制标准和熔炼配料。     

WD615气缸体铸件材料性能的改善

WD615气缸体铸件曾发生化学成分不稳定、铸件本体组织粗大、铁素体含量偏高、硬度偏低等质量问题，为此，采取了如下措施：1）加强熔炼用材料的质量控制；2）提高冲天炉的熔炼质量；3）改进熔炼工艺（调整C,Si量，采用Cu-Cr-Sn合金化；降低浇注温度）；4）改进孕育工艺；5）采用炉前快速检测技术；6）加强铸件本体质量检测。结果表明，缸体铸件的化学成分、金相组织及力学性能均满足技术要求。     

一种新型针状合金-金刚石复合钻头胎体配方的试验研究

本文首先介绍一种用于卵砾石地层钻进的新型针状硬质合金钻头的设计原理，而后简要说明其胎体配方组成机理。在分析胎体性能要求的基础上，选择了六组配方，对其进行抗弯强度、抗剪强度，硬度性能、冲击韧性、SEM照片等试验，优选了四号配方，试制了钻头。生产试验结果表明，这种新型复合型钻头钻进萝日砾石地层的平均时效1．89m／h、平均每回次进尺为2．3m，平均钻头寿命19．81m，具有实用和推广价值。     

An Optimization Method For Estimating Phase Compositions And Amounts In Two—Phase Nickel Base Superalloys

根据已知镍基合金成分和γ′相成分，运用分层宽容多目标优化法，分别计算了γ相成分及γ′相含量．优化测算过程的实现是通过建立使杠杆定律等式两端数值差最小和两相共格错配度最小的目标函数，并通过设置γ′相含量和基体相成分取值范围的约束条件而实现的．验证了该方法的可行性和准确性．     

锂电极表面膜的组成和阻抗行为

介绍了锂电池中锂电极的表面膜的组成和阻抗行为，并根据其表面膜的阻抗行为提出了电化学模型。     

影响磷石膏中残磷含量的主要因素分析

实现磷石膏的资源化，已经成为贵州省肥、磷化工企业可持续发展的重要影响因素；磷石膏中残磷的高含量不仅降低了磷酸的萃取率，同时影响磷石膏的资源化利用；分析了影响磷石膏化学成分的各种主要因素，并从磷石膏资源化的角度，讨论了磷石膏中的残磷及其影响因素；磷石膏成分随这些影响因素的不同而变化。     

Effect of MoS2 morphology on the HDS activity of hydrotreating catalysts

We have applied near-edge X-ray absorption fine structure (NEXAFS) to characterize the surface and bulk properties of Li_xNi_1–xO catalysts. In our experimental set-up, NEXAFS spectra of powder materials could be obtained by measuring the intensity of either electron-yield or fluorescence-yield. While the electron-yield method is sensitive only to the top few atomic layers, the fluorescence-yield method can detect species up to a few thousands angstroms deep into the bulk structure. The ability to distinguish surface and bulk compositions is demonstrated in studies of a number of Li_0.5Ni_0.5O samples, of which the surface compositions vary as a function of preparation procedures. In addition, NEXAFS investigations following the reaction of Li_xNi_1–xO with CH₄ have also been carried out and the results indicate that the initial surface reaction intermediates are Li₂CO₃.     

热固型甲基丙烯酸酯真空浸渗剂发展概况

本文简述了真空浸渗剂的发展概况，着重介绍了其中的热固化浸渗剂及其组成和浸渗工艺。     

Association of seed size with genotypic variation in the chemical constituents of soybeans

Ten soybean genotypes grown in 1992 with seed size ranging from 7.6 to 30.3 g/100 seeds and maturity group V or VI were selected and tested for oil and protein content and for fatty acid composition. In these germplasm, protein varied from 39.5 to 50.2%, oil, 16.3 to 21.6%, and protein plus oil, 59.7 to 67.5%. Percentages of individual fatty acids relative to total fatty acids varied as follows: palmitic, 11.0 to 12.8; stearic, 3.2 to 4.7; oleic, 17.6 to 24.2; linoleic, 51.1 to 56.3 and linolenic, 6.9 to 10.0. Seed size showed no significant correlations with individual saturated fatty acids, protein or oil content. However, significant correlations were found between seed size and individual unsaturated fatty acids: positive with oleic, and negative with linoleic and linolenic. Oil and protein content were negatively correlated with each other. Among the major fatty acids, only the unsaturated were significantly correlated with each other: negative between oleic and linoleic or linolenic, and positive between linoleic and linolenic. A subsequent study with soybeans grown in 1993 generally confirmed these findings. Variation in relative percentages of unsaturated fatty acids andr values for most pairs of relationships were even higher than those obtained from the 1992 crop. Presented at the 85th AOCS Annual Meeting and Expo, Atlanta, Georgia, May 8–12, 1994.