1Cr18Ni9Ti的TIG焊接头的电弧表面改性

开展了微束等离子弧对焊接接头的表面改性改性研究。采用４Ａ微束等离子弧对１Ｃｒ１８Ｎｉ９ＴｉＲＴ Ａ ＱＱＮＧＳＥ ＲＮＧＧＸＲＣ ＯＪＦ ＯＪＦ ＲＵＶ ＲＵＶ ＵＤＩ ＦＪＴＦＧＥ ＤＭ ＲＶ ＲＡＬ ＴＧＪ ＯＰＷＫ,ＣＭＰＷＷＶＳＲＢ ＹＡＡ ＳＵ ＪＯ ＴＭＧ ＸＥＸＫ,     

DEVELOPMENT OF MATERIAL USED FOR AVIATION APPARATUS AXLE JOURNALS

ＤＥＶＥＬＯＰＭＥＮＴＯＦＭＡＴＥＲＩＡＬＵＳＥＤＦＯＲＡＶＩＡＴＩＯＮＡＰＰＡＲＡＴＵＳＡＸＬＥＪＯＵＲＮＡＬＳ①ＷｕＥｎｘｉ,ＬｉＳｈｅｎ,ＱｉａｎＣｈｏｎｇｌｉａｎｇａｎｄＺｏｕＺｈｉｑｉａｎｇＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙｆｏｒＰｏｗｄ...     

NUMERICAL SIMULATION OF ALTERNATIVE HORIZONTAL LEVITATION ELECTROMAGNETIC CONTINUOUS CASTING（Ⅱ）

ＮＵＭＥＲＩＣＡＬＳＩＭＵＬＡＴＩＯＮＯＦＡＬＴＥＲＮＡＴＩＶＥＨＯＲＩＺＯＮＴＡＬＬＥＶＩＴＡＴＩＯＮＥＬＥＣＴＲＯＭＡＧＮＥＴＩＣＣＯＮＴＩＮＵＯＵＳＣＡＳＴＩＮＧ（Ⅱ）￥ＺｈｕＳｈｏｕｊｕｎ；ＲｅｎＺｈｏｎｇｍｉｎｇ；ＤｅｎｇＫａｎｇ；Ｊｉａｎ...     

XRD STUDY OF RECOVERY PROCESS OF COLD DEFORMED Ag AND Ag-Ce ALLOY

ＸＲＤＳＴＵＤＹＯＦＲＥＣＯＶＥＲＹＰＲＯＣＥＳＳＯＦＣＯＬＤＤＥＦＯＲＭＥＤＡｇＡＮＤＡｇ－ＣｅＡＬＬＯＹＮＩＮＧＹｕａｎｔａｏ;ＷＥＮＦｅｉ（ＫｕｎｍｉｎｇＩｎｓｔｉｔｕｔｅｏｆＰｒｅｃｉｏｕｓＭｅｔａｌｓＫｕｎｍｉｎｇ６５０２２１．Ｃｈｉｎａ）...     

EFFECT OF MICROSTRUCTURES ON CYCLIC-OXIDATION BEHAVIOUR OF TiAl ALLOY

ＥＦＦＥＣＴＯＦＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＮＣＹＣＬＩＣ－ＯＸＩＤＡＴＩＯＮＢＥＨＡＶＩＯＵＲＯＦＴｉＡｌＡＬＬＯＹＺｈｏｕＫｅｃｈａｏ；ＨｕａｎｇＢａｉｙｕｎ；ＱｕＸｕａｎｈｕｉ；ＨｅＹｕｅｈｕｉ；ＫｏｎｇＧａｏｎｉｎｇ（ＰｏｗｄｅｒＭｅｔａ...     

DEVELOPMENT OF BRAIDED－PULTRUSION PROCESS AND STRUCTURE－PROPERTY RELATIONSHIPS FOR TUBULAR COMPOSITES

ＤＥＶＥＬＯＰＭＥＮＴＯＦＢＲＡＩＤＥＤ－ＰＵＬＴＲＵＳＩＯＮＰＲＯＣＥＳＳＡＮＤＳＴＲＵＣＴＵＲＥ－ＰＲＯＰＥＲＴＹＲＥＬＡＴＩＯＮＳＨＩＰＳＦＯＲＴＵＢＵＬＡＲＣＯＭＰＯＳＩＴＥＳＪ．Ｈ．Ｂｙｕｎ;Ｓ．－Ｋ．ＬｅｅａｎｄＢ．Ｓ．Ｋｉｍ（Ｋｏｒｅａ...     

PHOTOELECTROCHEMICAL STUDY OF PASSIVE LAYERS ON COPPER ELECTRODES IN SOME ALKALINE MEDIA

ＰＨＯＴＯＥＬＥＣＴＲＯＣＨＥＭＩＣＡＬＳＴＵＤＹＯＦＰＡＳＳＩＶＥＬＡＹＥＲＳＯＮＣＯＰＰＥＲＥＬＥＣＴＲＯＤＥＳＩＮＳＯＭＥＡＬＫＡＬＩＮＥＭＥＤＩＡ①Ａ．Ｋａｍｋｉｎａ,１,ＺｈｏｕＧｕｏｄｉｎｇａ,ＸｕＱｕｎｊｉｅｂａｎｄＢ．Ｈ．ｃＬｏｏａＥ...     

INFORMATION DESIGN OF UNIVERSAL ADJUSTMENT PROGRAM OF PLANE CONTROL NETWORKS

ＩＮＦＯＲＭＡＴＩＯＮＤＥＳＩＧＮＯＦＵＮＩＶＥＲＳＡＬＡＤＪＵＳＴＭＥＮＴＰＲＯＧＲＡＭＯＦＰＬＡＮＥＣＯＮＴＲＯＬＮＥＴＷＯＲＫＳＩＮＦＯＲＭＡＴＩＯＮＤＥＳＩＧＮＯＦＵＮＩＶＥＲＳＡＬＡＤＪＵＳＴＭＥＮＴＰＲＯＧＲＡＭＯＦＰＬＡＮＥＣＯＮＴＲＯ...     

THEORETICAL DERIVATION OF CRITERION G／FOR PREDICTION OF SHRINKAGF CAVITIES AND POROSITIES IN CASTINGS

ＴＨＥＯＲＥＴＩＣＡＬＤＥＲＩＶＡＴＩＯＮＯＦＣＲＩＴＥＲＩＯＮＧ／ＦＯＲＰＲＥＤＩＣＴＩＯＮＯＦＳＨＲＩＮＫＡＧＦＣＡＶＩＴＩＥＳＡＮＤＰＯＲＯＳＩＴＩＥＳＩＮＣＡＳＴＩＮＧＳ￥Ｂ．Ｑ．ＪｉｏａｎｄＢ．Ｃ．Ｌｉｕ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈ...     

LUBRICATING BEHAVIOR OF COPPER RHENATE AT ELEVATED TEMPERATURES

ＬＵＢＲＩＣＡＴＩＮＧＢＥＨＡＶＩＯＲＯＦＣＯＰＰＥＲＲＨＥＮＡＴＥＡＴＥＬＥＶＡＴＥＤＴＥＭＰＥＲＡＴＵＲＥＳ①ＸｉｏｎｇＤａｎｇｓｈｅｎｇＮａｔｉｏｎａｌＫｅｙＬａｂｏｒａｔｏｒｙｆｏｒＰｏｗｄｅｒＭｅｔａｌｕｒｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎ...     

Acid-base behavior of cryptand 1, 4, 7, 10, 13, 16, 21, 24-octaaza-bicycio[8, 8, 8] hexacosan-3, 8, 12, 17, 20, 25-hexone and complex formation

The bicyclic cryptand 1,4, 7, 10, 13, 16, 21, 24-octaaza-bigcyclo [8, 8, 8] hexacosan-3, 8, 12, 17, 20, 25-hexone (COBH) bearing diaminoethane groups along the eight-atom bridges was synthesized. The structure consists of discrete neutral macrobicyclic units; the two cycles share the two tertiary amine nitrogen atoms, which exhibit an endo-endo conformation. Three identical branches formed by 1, 2-diaminoethane link the two tertiary amine groups. The protonation reactions ofcryptand (COBH) and its complex formation with copper (Ⅱ) were investigated by potentiometry in water and in a DMSO/water (80: 20 in mass ratio) mixture as solvents. The cryptand acts as a bis-base through its two Nbridgehead and exhibits a strong cooperativity that favors the first protonation and makes the second one difficult (pK 5.0 ). An inward rotation of the amide groups to form hydrogen bonds accounts for this cooperativity. The interaction of COBH with copper (Ⅱ) leads to several binuclear complex proton contents.     

The Al−Li−X systems (X=Ag,As, P,B, Cd,Ge, Fe,Ga, H,In, N,Pb, S,Sb and Sn)

This work was supported by the Department of Energy, Mines and Resources, Government of Canada and the Canadian National Data Program for Alloy Phase Diagrams, ASM INTERNATIONAL. Literature searched through 1986. Professor Cahoon is the ASM/NIST Data Program Category Editor for ternary aluminum-lithium-X alloys.     

Supplemental Literature Review of Binary Phase Diagrams: Cs-In, Cs-K, Cs-Rb, Eu-In, Ho-Mn, K-Rb, Li-Mg, Mg-Nd, Mg-Zn, Mn-Sm, O-Sb, and Si-Sr

Recent literature on Cs-In, Cs-K, Cs-Rb, Eu-In, Ho-Mn, K-Rb, Li-Mg, Mg-Nd, Mg-Zn, Mn-Sm, O-Sb, and Si-Sr phase diagrams is reviewed in this article in order to update the 1990 compilation Binary Alloy Phase Diagrams, 2nd edition, by T.B. Massalski, et al. For some systems reaction tables and crystal structure data have been included, as well. Diagrams have been checked for consistency with rules for phase diagram construction and modified when necessary. In addition, diagrams needing more work have been identified.     

Supplemental Literature Review of Binary Phase Diagrams: Bi-Ce, Bi-Er, C-Ce, C-La, C-Pr, Cd-I, Cr-Cu, Cu-Er, Er-Sb, F-Sm, F-Yb, and Fe-Gd

Recent literature on Bi-Ce, Bi-Er, C-Ce, C-La, C-Pr, Cd-I, Cr-Cu, Cu-Er, Er-Sb, F-Sm, F-Yb, and Fe-Gd phase diagrams is reviewed in this article in order to update the 1990 compilation Binary Alloy Phase Diagrams, 2nd edition, by T.B. Massalski, et al. For some systems reaction tables and crystal structure data have been included, as well. Diagrams have been checked for consistency with rules for phase diagram construction and modified when necessary. In addition, diagrams needing more work have been identified.     

Supplemental Literature Review of Binary Phase Diagrams: Cd-Se, Cu-Hg, Cu-Ho, Eu-Mg, H-Sr, Hf-Si, La-Mn, Mn-Nd, Nb-Y, Ni-Y, Pb-Se, and Sc-Sr

Recent literature on Cd-Se, Cu-Hg, Cu-Ho, Eu-Mg, H-Sr, Hf-Si, La-Mn, Mn-Nd, Nb-Y, Ni-Y, Pb-Se, and Sc-Sr phase diagrams is reviewed in this article in order to update the 1990 compilation Binary Alloy Phase Diagrams, 2nd edition, by T.B. Massalski, et al. For some systems reaction tables and crystal structure data have been included, as well. Diagrams have been checked for consistency with rules for phase diagram construction and modified when necessary. In addition, diagrams needing more work have been identified.     

新型高强塑积富B-Al合金的电阻点焊熔核飞溅研究

通过自行设计配比一种新型高强塑积富B-Al合金材料。考虑到该种合金材料主要用于乘用车结构件,因此着重研究电阻点焊焊接性。同时借鉴国际焊接性评判标准ISO 14327-2004,设计了复杂焊接条件下的混合水平均匀设计实验。找出了影响该材料点焊熔核飞溅的主要工况因素,并通过建立点焊熔核飞溅边界曲线,从而有效地预测该材料点焊飞溅概率,更进一步地了解点焊熔核质量及点焊飞溅现象与焊接工艺、焊接环境等因素的相互关系,通过建立该材料点焊熔核力矩平衡方程与熔核膨胀应力数值仿真,深入分析点焊飞溅机理,在一定程度上促进了该新型高强塑积合金的实际应用。     

Comparison of geometries and electronic structures of polyacetylene,polyborole, polycyclopentadiene,polypyrrole, polyfuran,polysilole, polyphosphole,polythiophene, polyselenophene and polytellurophene

Geometries of monomers through hexamers of cylopentadiene, pyrrole, furan, silole, phosphole, thiophene, selenophene and tellurophene, and monomers through nonamers of borole were optimized employing density functional theory with a slightly modified B3P86 hybrid functional. Bandgaps and bandwidths were obtained by extrapolating the appropriate energy levels of trimers through hexamers (hexamers through nonamers for borole) to infinity. Bandgaps increase with increasing π-donor strengths of the heteroatom. In general, second period heteroatoms lead to larger bandgaps than their higher period analogs. Polyborole is predicted to have a very small or no energy gap between the occupied and the unoccupied π-levels. Due to its electron deficient nature polyborole differs significantly from the other polymers. It has a quinoid structure and a large electron affinity. The bandgaps of heterocycles with weak donors (CH₂, SiH₂ and PH) are close to that of polyacetylene. For polyphosphole this is due to the pyramidal geometry at the phosphorous which prevents interaction of the phosphorus lone pair with the π-system. The bandgap of polypyrrole is the largest of all polymers studied. This can be attributed to the large π-donor strength of nitrogen. Polythiophene has the third largest bandgap. The valence bandwidths differ considerably for the various polymers since the avoided crossing between the flat HOMO — 1 band and the wide HOMO band occurs at different positions. The widths of the wide HOMO bands are similar for all systems studied. All of the polymers studied have strongly delecalized π-systems.     

Crystal structures of R2Pd2Pb (R = Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, and Lu) compounds

The crystal structures of the R₂Pd₂Pb (R=Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, and Lu) compounds were determined using X-ray powder diffraction. The investigated compounds crystallize with Mo₂FeB₂ structure type (space group P4/mbm, Pearson code tP10). The importance of stabilization by polar intermetallic R–Pd bonding is underscored by a bonding analysis derived from electronic band structure calculations.