Thermodynamic Research on Precipitates in Low Carbon Nb-Microalloyed Steels Produced by Compact Strip Production

Microalloying element Nb in low carbon steels produced by compact strip production （CSP） process plays an important role in inhibiting recrystallization, decreasing the transformation temperature and grain refinement.With decreasing the rolling temperature, dislocations can be pinned by carbonitrides and the strength is increased. Based on the two sublattice model, with metal atom sublattice and interstitial atom sublattice,a thermodynamic model for carbonitride was established to calculate the equilibrium between matrix and carbonitride. In the steel produced by CSP, the calculation results showed that the starting temperature of precipitation of Ti and Nb are 1340℃ and 1040℃, respectively. In the range of 890-950℃, Nb rapidly precipitated. And the maximum of the atomic fraction of Nb in carbonitride was about 0.68. The morphologies and energy spectrum of the precipitates showed that （NbTi） （CN） precipitated near the dislocations. The experiment results show that Nb rapidly precipitated when the temperature was lower than 970℃, and the atomic fraction of Nb in carbonitride was about 60%-80%. The calculation results are in agreement with the experiment data. Therefore the thermodynamic model can be a useful assistant tool in the research on the precipitates in the low carbon steels produced by CSP.

Studies on Production Planning of Dispersion Type U3Si2-Al Fuel in Plate-Type Fuel Elements for Nuclear Research Reactors

Several fuel plants that supply nuclear research reactors need to increase their production capacity in order to meet the growing demand for this kind of nuclear fuel. After the enlargement of the production capacity of such plants, there will be the need of managing the new production level. That level is usually the industrial one, which poses challenges to the managerial staff. Such challenges come from the fact that several of those plants operate today on a laboratorial basis and do not carry inventory. The change to the industrial production pace asks for new actions regarding planning and control. The production process based on the hydrolysis of UF6 is not a frequent production route for nuclear fuel. Production planning and control of the industrial level of fuel production on that production route is a new field of studies. The approach of the paper consists in the creation of a mathematical linear model for minimization of costs. We also carried out a sensitivity analysis of the model. The results help in minimizing costs in different production schemes and show the need of inventory. The mathematical model is dynamic, so that it issues better results if performed monthly. The management team will therefore have a clearer view of the costs and of the new, necessary production and inventory levels.

Development of Warp Knitted Products on RSJ Machine

Products made by Raschel Jacquard(RSJ)high-speed jacquard warp knitting machine are used in ornament and apparel fabrics.However,most products are produced according to the existing samples.The capability of creative design is not enough at home.In this paper,based on the basic features,the knitting methods and the working principles of warp knitting jacquard machines,the rules for manufacturing jacquard products are summarized.The article provides the new thoughts for the development of fabrics,such as the pattern design,changing the cams,power-net and a special technology of without pillar,which were obtained from the practices in a factory.

Status of Fabricated Products of Titanium in China

China has had 30 years experience in titanium research,development,production and appli-cation so far.It was really a rough and bumpy road for developing Ti working industry,however,since a large amount of work was done and great many achievements were obtained by the scien-tists and engineers in this field,a firm base of Ti working industry has been established in China atlast.Especially since the beginning of 1980 s,it has been developed to a new level.On these bases,afavourable condition to speed up the development of Ti working industry arises in China.

A New Approach for Machine Gauge &Production Calculation of Various Kinds of Rib and Interlock Knitted Fabric Structure

Various types of rib and interlock fabrics found in the market depend on their structure such as 1 × 1 rib, 2 × 1 rib, 2 × 2 rib, 3 × 1 rib, 3 × 2 rib, 4 × 1 rib, 4 × 4 rib and 1 × 1 interlock, 2 × 2 interlock etc. These all types of fabric can be possible to knit in circular knitting machine after machine setting. When these fabrics are knit on the machine, some needles are needed to drop or withdrawn from needle groove according to their design such as 1 × 1, 2 × 1, 2 × 2 etc. Due to needle dropping or withdrawing production per hour will changed as production per hour directly depends on the No. of active needle. No. of needle or active needle depends on machine gauge. This paper gives a new approach for machine gauge which is somewhat different from other thinking. This paper also shows the production calculation formula with their machine setting for various rib and interlock fabric with their derivation. By this paper, one can easily understood about machine gauge and calculated production of any type of rib and interlock knitted structure. Complexity of calculating production can be reduced by this paper.

Hangzhou Kelida Fabric Products Co.,Ltd

Hangzhou Kelida Fabric Products Co.,Ltd is located in Yuhang RenHe , a cradle of Liangzhu Culture. Developed from Hangzhou Kelida Textile Mill Co.,Ltd , and as the National Fabric developing base, Kelida has imported more than 70 SMITG6300S360 jacquard looms from Italy, and STAWBLI2688

Yarn & Fabric Production Rise in Q2 China with record yarn and fabric output

International Textile Manufacturers Federation (ITMF) released trade report of second quarter of 2008. The 2nd quarter in 2008 saw a

Higher Global Yarn and Fabric Production,Says ITMF

The International Textile Manufacturers Federation (ITMF) released its latest STATE OF TRADE REPORT Q2/2010, indicating that the strong global recovery in yarn and fabric production since their recent lows in the first quarter of 2009 continued also into the second quarter of 2010. Besides, all regions contribute to the continued recovery.

Controllable preparation of graphene glass fiber fabric towards mass production and its application in self-adaptive thermal management

Direct synthesis of graphene on nonmetallic substrates via chemical vapor deposition (CVD) has become a frontier research realm targeting transfer-free applications of CVD graphene.However,the stable mass production of graphene with a favorable growth rate and quality remains a grand challenge.Herein,graphene glass fiber fabric (GGFF) was successfully developed through the controllable growth of graphene on non-catalytic glass fiber fabric,employing a synergistic binary-precursor CVD strategy to alleviate the dilemma between growth rate and quality.The binary precursors consisted of acetylene and acetone,where acetylene with high decomposition efficiency fed rapid graphene growth while oxygencontaining acetone was adopted for improving the layer uniformity and quality.Notably,the bifurcating introducing-confluent premixing (BI-CP) system was self-built for the controllable introduction of gas and liquid precursors,enabling the stable production of GGFF.GGFF features solar absorption and infrared emission properties,based on which the self-adaptive dual-mode thermal management film was developed.This film can automatically switch between heating and cooling modes by spontaneously perceiving the temperature,achieving excellent thermal management performances with heating and cooling power of~501.2 and~108.6 W m-2,respectively.These findings unlock a new strategy for the large-scale batch production of graphene materials and inspire advanced possibilities for further applications.

Electrosynthesis of H_(2)O_(2) through a two-electron oxygen reduction reaction by carbon based catalysts:From mechanism,catalyst design to electrode fabrication

Hydrogen peroxide(H_(2)O_(2))is an efficient oxidant with multiple uses ranging from chemical synthesis to wastewater treatment.The in-situ H_(2)O_(2)production via a two-electron oxygen reduction reaction(ORR)will bring H_(2)O_(2)beyond its current applications.The development of carbon materials offers the hope for obtaining inexpensive and high-performance alternatives to substitute noble-metal catalysts in order to provide a full and comprehensive picture of the current state of the art treatments and inspire new research in this area.Herein,the most up-to-date findings in theoretical predictions,synthetic methodologies,and experimental investigations of carbon-based catalysts are systematically summarized.Various electrode fabrication and modification methods were also introduced and compared,along with our original research on the air-breathing cathode and three-phase interface theory inside a porous electrode.In addition,our current understanding of the challenges,future directions,and suggestions on the carbon-based catalyst designs and electrode fabrication are highlighted.

One-step Production of Continuous Supercapacitor Fibers for a Flexible Power Textile

Given that conventional bulky electrochemical energy storage devices are too rigid and heavy to be considered wearable,developing fully integrated power systems is expected to accelerate the successful commercialization of smart electronic textiles.Although great achievements have been made for fiber-shaped energy storage devices, there remain key challenges pertaining to their fabrication efficiency, scalability, and stability. Herein, a general and highly efficient method is developed to continuously fabricate supercapacitor fibers with lengths of kilometers at high production rate up to 118 m/h through a simple one-step wet spinning method.Beneficial from the designed unique two-circle-in-one-circle architecture, the resulting supercapacitor fibers demonstrated high electrochemical stability even after being bended for 1 × 10~5 cycles. As a demonstration, these continuous supercapacitor fibers were further woven into a flexible power scarf for large-scale applications in wearable electronics. This simple and scalable fabrication process combined with the unique structure provides a general and effective paradigm to design other fiber-shaped devices like sensors, batteries,and solar cells.