MAGNETIC PROPERTIES AND APPLICATIONS OF NEWLY-DEVELOPED NANOCRYSTALLINE Fe_(73.5)Cu_1Nb_2V_1Si_(13.5)B_9 ALLOY

报道了新开发的纳米晶Ｆｅ７３．５Ｃｕ１Ｎｂ２Ｖ１Ｓｉ１３．５Ｂ９合金的综合软磁性能。新合金的高频铁损水平为：Ｐ３／１００ｋ＝５１０ｋＷ·ｍ－３，Ｐ２／２００ｋ＝７４８ｋＷ·ｍ－３，Ｐ２／５００ｋ＝３６７１ｋＷ·ｍ－３和Ｐ０．５／１０００ｋ＝８７１ｋＷ·ｍ－３。新合金的铁损比早期开发的纳米晶Ｆｅ－Ｃｕ－Ｎｂ－Ｓｉ－Ｂ合金的低且明显低于优良的功率Ｍｎ－Ｚｎ铁氧体Ｈ７ｃ４的铁损。对铁损与频率和幅值磁通密度的关系进行了分析。也报道了新合金在若干方面的实际应用。     

THE ORDERING OF THE α-Fe(Si)PHASE IN Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 ANNEALED ALLOY

用ＸＲＤ法研究了退火Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ１３．５Ｂ９合金中α－Ｆｅ（Ｓｉ）晶化相的有序化过程，结果表明，Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ１３．５Ｂ９非晶合金在４９０℃，１ｈ退火后，α－Ｆｅ（Ｓｉ）晶化相是具有ＤＯ３结构的有序相，有序畴为球形，直径为７．０ｎｍ，它随退炎温度的升颃是长大，在５９０℃退火后达１０．９ｎｍ，与α－Ｆｅ（Ｓｉ）的尺寸相当，此时α－Ｆｅ（Ｓｉ）的有序度为０．８，在８５０℃     

Fe73.5Ag1.0Nb3.0Si13.5B9.0软磁合金的结构和磁性

利用Ｘ射线衍射及磁测量等方法研究了不同退火温度下Ｆｅ７３．５Ａｇ１．０Ｎｂ３．０Ｓｉ１３．５Ｂ９．０软磁合金的结构和磁性，发现Ｆｅ７３．５Ａｇ１．０Ｎｂ３．０非晶态态合金在５００℃下退火处理１ｈ后，有少量的α－Ｆｅ和南Ａｇ析出，此时的软磁性能较好，随退火温度的增加，Ｆｅ２３Ｂ６、Ｆｅ２Ｂ、Ｆｅ３Ｂ等Ｆｅ－Ｂ化合物大量析出，软磁性能急剧下降，在Ｆｅ７３．５Ａｇ１．０Ｎｂ３．０Ｓｉ１３．５Ｂ９．０非晶     

FeCuNbVSiB纳米晶软磁合金及其在电力电子技术领域中的应用

报道了新开发的Ｆｅ７３．２Ｃｕ０．８Ｎｂ２Ｖ１．５Ｓｉ１．５Ｂ１１纳米晶合金的主要磁性能：μ０≥８×１０＾４,ＢＳ＝１．４０Ｔ,Ｐ０．５／２０ｋ≤１９Ｗ／ｋｇ,Ｐ０．５／５０ｋ≤９０Ｗ／ｋｇ。以μ（ｋ）ｔ Ｐ０．５／２０ｋ为参数,研究了合金的温度稳定性。研究表明,与２５℃时全金性能相比,在－５０℃和＋５０℃时合金性能的相对变化率不超过５％。介绍了合金在中、高频功率变压器、传感器、电感器等电力电子技     

Fe73.5Cu1Nb3Si13.5B9非晶合金的晶化动力学

用ＤＴＡ结合ＸＲＤ了Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ１３．５Ｂ９晶合金的晶化动力学。表明，该事金在５００℃时析出α－Ｆｅ（Ｓｉ）相。晶化初期激活能最小为２４２ｋＪ／ｍｏｌ，它随晶化量的增加，在ＸＣ为０．４－０．８时，呈极大值为５２０ｋＪ／ｍｏｌ。在６２４℃时析出Ｆｅ２Ｂ相。     

退火Fe_（73．5）Cu_1Nb_3Si_（13．5）B_9合金中α－Fe（S

用ＸＲＤ法研究了退火Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ１３．５Ｂ９合金中α－Ｆｅ（Ｓｉ）晶化相的有序化过程．结果表明，Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ１３．５Ｂ９非晶合金在４９０℃，１ｈ退火后，α－Ｆｅ（Ｓｉ）晶化相是具有ＤＯ３结构的有序相，有序畴为球形，直径为７．０ｎｍ，它随退火温度的升高而长大，在５９０℃退火后达１０．９ｎｍ，与α－Ｆｅ（Ｓｉ）的尺寸相当．此时，α－Ｆｅ（Ｓｉ）的有序度为０．８在８５０℃，１ｈ退火后，α－Ｆｅ（Ｓｉ）的ＤＯ３超点阵线条消失．在５５０℃等温退火时，α－Ｆｅ（Ｓｉ）的ＤＯ３有序畴先为椭球状，于６０ｍｉｎ退火后形成球状，直径为１０ｎｍ．     

Fe基非晶和纳米晶合金的热膨胀

将非晶Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ１３．５Ｂ９和Ｆｅ９１Ｚｒ７Ｂ２合金经退火制成纳米晶合金，测量了淬火态和退火态样品的热膨胀曲线，研究了退火温度对热膨胀的影响，结果表明，纳米晶粒的形成导致居里温度Ｔｃ以下的热膨胀系数急剧增加，而Ｔｃ以上的热膨胀系数几乎不随退火温度变化。     

Fe73.5Cu1Mo3Si13.5B9微晶软磁合金的结构及其对磁性的影响

对Ｆｅ７３．５Ｃｕ１Ｍｏ３Ｓｉ１３．５Ｂ９微晶软磁合金的结构及其对合金磁性的影响了研究，结果表明，在最佳磁性能下，晶相点阵常数ａ＝０．２８４３ｎｍ，相当于Ｆｅ（Ｓｉ）固溶体中含Ｓｉ％（ｍｏｌ／ｍｏｌ）：１８－２０，体积百分数Ｖ＝７４．８％，晶粒尺寸Ｄ＝１４．６ｎｍ；残余非晶层厚度δ＝１．２３ｎｍ；当Ｔ退火≥５６０℃时明显有Ｆｅ－Ｂ化合物析出。Ｆｅ７３．５Ｃｕ１Ｍｏ３Ｓｉ１３．５Ｂ９合金的磁性不仅与     

预退火对Fe73.5Cu1Mo3Si13.5B9纳米晶合金形成的影响

采用Ｘ射线衍射，电子衍射及透射电子显微技术研究了Ｆｅ７３．５Ｃｕ１－ｘＭｏ３Ｓｉ１３．５Ｂ９非晶合金４１０℃预退火对随后４８０℃退火所形成的纳米晶结构的影响。结果表明，预退火对Ｆｅ７３。０５，Ｃｕ１Ｍｏ３Ｓｉ１３．５Ｂ９合金纳米晶结构的形成有重要影响。当预退火时间从０小时增加到３小时，合金在４８０℃，小时退火形成的晶相化α－Ｆｅ（Ｓｉ）的晶粒尺寸从１５ｎｍ减小到８ｎｍ。预退火使α－Ｆｅ（Ｓｉ）相的     

Sm8Fe83Si2C5Cu0.5Nb1.5非晶合金的晶化动力学

用差热分析（ＤＴＡ）,结合Ｘ射线衍射（ＸＲＤ）研究了Ｓｍ８Ｆｅ８３Ｓｉ２Ｃ５Ｃｕ０．５Ｎｂ１．５非晶合金的晶化动力学。结果表明：温度在０￣１０００℃范围内,该合金的晶化相为α－Ｆｅ和Ｓｍ２（ＦｅＳｉ）１７Ｃｘ,α－Ｆｅ相的晶化表观激活能力３４９．５３ｋＪ／ｍｏｌ,Ｓｍ２（ＦｅＳｉ）１７Ｃｘ的晶化表观激活能力３１６．１９ｋＪ／ｍｏｌ,两相在晶化初期激活能量小,随晶化量（ｘｃ）的增加激活能增大,当α－     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to