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     NiCoCrAlY cladding has been remelted on the GH140 alloy surface by 2 kW-CO_2 gas laser.
     应用2kW-CO_2激光器,在GH140合金表面进行NiCoCrAlY包覆涂层重熔处理。
短句来源
     NiCoCrAlY cladding has been remelted on the GH140 alloy surface by2kW—CO2 gas laser.
     应用2kW-CO_2激光器,在 GH140合金表面进行 NiCoCrAlY 包覆涂层重熔处理。
短句来源
     PPARγ expression of GH3, MMQ and ATt20 cell line was evaluated by RT-PCR and Western Blot.
     RT-PCR及Western Blot方法检测PPARγ在GH3、MMQ、ATt20等垂体瘤细胞株中的表达情况。
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     Application of EAF-VOD Techniquefor Melting Superalloy GH2132
     EAF-VOD技术在GH2132合金生产中的应用
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     Based upon the results of present work, the upper and lower composition limits of these elements in alloy GH128 have been determined as follows: W=7.5-9.0%, Mo=7.5-9.0%, Fe≤2.0% and C≤0.05%.
     通过本试验确定这些元素在GH128合金中的上下限是:W=7.5~9.0%、Mo=7.5~9.0%、Fe≤=2.0%、C≤0.05%。
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     in contrast,GH increased.
     生长激素 (GH )升高。
短句来源
     GH~+,Cln~-;
     GH+,Cln-;
短句来源
     DIFFUSION OF BORON IN GH128 NICKEL-BASE ALLOY
     硼镍基合金GH128中的扩散
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     THE ROLE OF Mg IN THE SUPERALLOY GH220
     Mg高温合金GH220中的作用
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In this paper the following theorerms and propositions are proved:1°For any self-conjugate matrix A of rank γ over the skew-field of quaternions there exists a left tall matrix L such that L'AL is a γ-rowed non-singular self-conjugate matrix;2°Unique decomposition theorem of positive definite matrix;3°A determinant of a self-conjugate matrix is not changed in value under the GH-congruence trasformations;4°Some equivalent propositions about positive definite matrices and semi-positive definite matrices.

本文证明了下面一些定理与命题: 1°对四元数体上任意秩数为r的自共轭矩阵A恒存在一个左高矩阵L使得为一个r阶的非奇异自共轭矩阵; 2°正定矩阵的唯一分解定理; 3°自共矩矩阵的行列式在GH合同变换下不变值; 4°关于正定矩阵与半正定矩阵的一些等价命题。

A study was made of the electron diffraction patterns of extracted μ-phase which identified with that of X-ray powder diffraction in superalloy GH302.It is shown that the reflections with—h+k+l≠3n spots, e.g. {100}, {200},etc.in [C01] zone and {110},{101}, etc. in [111] zone (indexed as hexagonal) are forbidden for the R3m space group. These "forbidden" diffractions cannot be attributed to double diffraction with neither non-zero Laue zone nor other phases such as MgZn_2 type Laves phase. Based on diffraction...

A study was made of the electron diffraction patterns of extracted μ-phase which identified with that of X-ray powder diffraction in superalloy GH302.It is shown that the reflections with—h+k+l≠3n spots, e.g. {100}, {200},etc.in [C01] zone and {110},{101}, etc. in [111] zone (indexed as hexagonal) are forbidden for the R3m space group. These "forbidden" diffractions cannot be attributed to double diffraction with neither non-zero Laue zone nor other phases such as MgZn_2 type Laves phase. Based on diffraction extinction law, it seems to be a primitive hexagonal lattice (P6). Its lattice constant is consistent with that of μ-phase (R3m) described as hexagonal. It may be a kind of local-ordering structure of μ-phase.

在GH302合金的萃取μ相电子衍射花样中,(经X射线粉末衍射确定为μ相)出现了μ相空间群为(?)m的-h+k+l(?)3n禁止衍射。例如:[001]带轴中的{100},{200}等衍射斑点,以及{111}带轴中的{(?)},{(?)}等衍射斑点,这些禁止衍射斑点,不属于二次衍射,高级劳厄带或者其它物相(例如MgZn_2型Laves相)的衍射斑点。因此,根据衍射消光规律可以确定该物相为简单六方点阵,其晶胞参数与μ相((?)m)用六方点阵所描述的情况相符合。它可能是一种μ相局部有序结构。

The effect of hot corrosion on creep strength of the superalloy GH37 at 700℃ and 850℃ has been studied by comparing the results for both bare specimens and specimens coated with a salt mixture of 25% NaCl and 75% Na_2SO_4. Results show that the secondary creep rate increases and that the life of creep rupture and ductility decreases considerably with salt coated specimens. The effect of hot corrosion on creep strength of alloy at 700℃ is much more severe than that at 850℃, although the alloy is nearly unattacked...

The effect of hot corrosion on creep strength of the superalloy GH37 at 700℃ and 850℃ has been studied by comparing the results for both bare specimens and specimens coated with a salt mixture of 25% NaCl and 75% Na_2SO_4. Results show that the secondary creep rate increases and that the life of creep rupture and ductility decreases considerably with salt coated specimens. The effect of hot corrosion on creep strength of alloy at 700℃ is much more severe than that at 850℃, although the alloy is nearly unattacked at 700℃ by salt. Direct observation of fracture surface leads us to suggest that for the salt coated specimens the decrease of creep rupture life at 700℃ is due to the reduction, of the crack initiation time, while the reduction of the creep rupture life at 850℃ is due to the acceleration of creep crack growth rate. The creep strength of the alloy can be improved by means of Al-Cr diffusion coating on the specimen.

采用在GH37合金上涂敷NaCl(25Wt%)及Na_2SO_4(75Wt%)的方法,研究了700℃及850℃下热腐蚀对蠕变强度的影响。发现试样涂上混合盐后,蠕变第二阶段速率增大,并严重降低二个温度下的蠕变断裂寿命及断裂塑性。值得提出的是,尽管700℃下合金几乎不经受热腐蚀,但与850℃的相比,对蠕变强度的影响却是700℃时更为强烈。由断口观察推测,涂盐试样在700℃下蠕变寿命下降是由于缩短了蠕变裂纹萌生期。850℃下蠕变寿命的下降是由于蠕变裂纹扩展速率的增大。试样上渗涂Al-Cr涂层后,可以大大提高在热腐蚀介质中合金的蠕变强度。

 
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