管的锻焊

本发明提供一种用于被锻焊管端的强制冷却的方法，其中，当将管端压在一起时，将管端加热到高于1200℃的预定温度，从而通过锻焊进行连接，随之，在锻焊操作后的3min内将被锻焊的管端从高于1200℃的温度冷却到600℃以下。备有EMAT焊接检查探测器、热处理线圈和冷却流体注入喷嘴装置的内置内部矛，     

汽轮机隔板电子束焊接方法

汽轮机隔板电子束焊接方法的焊接工艺如下：a．对隔板叶片进行表面清理；b.按照汽轮机隔板装配技术要求在工装上对隔板叶片进行装配、固定；c.将固定后的隔板叶片移至电子束焊接真空室内进行隔离抽真空；d．当真空度到达设定值后。用电子束流对隔板进行15～30min预热；     

Determination of isothermal section of Fe-Ti-Zr ternary system at 1173 K

Phase relations in the Fe-Ti-Zr ternary system at 1173 K were investigated by means of diffusion-triple approach together with electron probe microanalysis（EPMA） technique. A series of tie lines and tie-triangles were determined and the isothermal section at 1 173 K was established, which consists of four three-phase fields： β（Ti, Zr）＋FeZr2＋FeTi, FeZr2＋FeTi＋Fe2Zr, FeTi ＋Fe2Zr ＋Fe2Ti and Fe2Zr ＋Fe2Ti ＋Fe. The results show that the largest solubility of Ti in Fe2Zr is about 11.3 %（mole fraction） and the solid solubility of Ti in FeZr2 is about 26.9%, the solid solubility of Zr in Fe2Ti is about 8.1% and the solid solubility of Zr in FeTi is 7.2%. The binary compound FeZr2 is nearly a linear compound. No ternary compound is found.     

Graphene-coated copper foam interlayer for brazing carbon/carbon composite and niobium

Problems such as poor structural integrity, inhomogeneous dispersion, and agglomeration of graphene in the brazing seam are typically encountered for graphene additives in a brazed joint interface. To resolve these problems, a plasma-enhanced chemical vapor deposition process was employed for in-situ preparation of a high-quality graphene-coated copper (Cu) foam composite interlayer prior to be applied for brazing carbon/carbon composite and niobium. The prepared graphene and the brazed joints were characterized via Raman spectroscopy, scanning electron microscopy, and high-resolution transmission electron microscopy. The results revealed that graphene was evenly distributed in the brazing seam with the help of the Cu foam, which was characterized by interconnected porosity. Simultaneously, the excellent chemical inertia of graphene inhibited the collapse of the Cu foam, based on which the thermal residual stress in the joint was effectively mitigated due to the synergistic reinforcement effect of the Cu foam (with good plastic deformation capacity) and graphene (with extremely low coefficient of linear expansion). This effect led to significant improvement in the average shear strength of the joint.     

聚甲醛及其共混改性

介绍了聚甲醛（ＰＯＭ）的结构，特性，力学性能，热性能，电性能以及它的合成方法和加工应用，综述了国内外对ＰＯＭ的增韧行为和共混改性的研究进展状况。     

2─氧─（2─羟基丙基）─β─环糊精的简便合成及纯化

考察了在碱性溶液中环氧丙烷与β－环糊精（β－ＣＤ）的反应，提出２－氧－（２－羟基丙基）－β－ＣＤ的一种简便而有效的制备方法，产率可达２１％。并详细报道了产物的纯化方法。     

新型复合硅酸盐水泥

采用新型复合硅酸盐水泥技术,不仅混合材掺量可增达40％～50％,水泥产量提高40％以上,且水泥具有出磨安定性合格,干缩变形小,抗折强度高,抗硫酸盐侵蚀等优良性能。     

镀硬铬工艺中提高铬层附着力的方法

根据某些产品对镀硬铬的特殊要求,经过一系列的试验,摸索出了一些有效地提高铬层附着力的方法.从而,大大地提高了镀硬铬工艺的合格率以及镀件的使用寿命.     

磁致冷材料研究进展

介绍了磁致冷材料磁热效应的表征方法，概述了国内外各温度区间磁致冷材料的研究进展。在20K以下温区，磁致冷材料研究主要集中在具有高导热率、低点阵热容和极低有序化温度的石榴石，如Gd3Ga5O12(GGG)，Dy3Al5O12(DAG)，Gd3Ga5-xFexO12(GGIG)及Er基磁致冷材料；20K～77K温度区间，磁致冷材料研究主要集中在重稀土金属间化合物中，如(Dy1-xErx)Al2复合材料等；在室温附近，具有大磁热效应的磁致冷材料以稀土Gd，Gd5(SixGe1-x)4(0≤x≤0．5)和MnFeP1-xAsx(0．15≤x≤0．66)合金为代表，特别是Gd5Si2Ge2(Tc=274K)和MnFeP0.45As0.55(Tc=300K)合金，在磁场5T下具有巨磁热效应，是Gd的2倍以上。总结了各温度区间磁致冷材料的选择依据。重点评述了室温磁致冷材料的最新研究成果，展望了室温磁致冷材料的发展前景。