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ZHEJIANG JIULI HI Technology METALS CO. and Zhejiang Jiuli Group Co. | Date: 2006-01-24

Steel in sheet, rod, bar and billet form, casting alloys, metal alloys for further manufacturing, metal tubes, metal barrels, metal pipes and fittings therefor, metal junctions for pipes, metal staircases, metal railway crossovers, metal cable wire, non-electric multi-strand wire, non-electric single-strand wire, barbed wire, metal expansion joints for floors and walls, metal pipe couplings and joints, metal cable clips, nails, metal fasteners, namely bolts, rivets and screws, metal windows, metal sash fasteners for windows, metal hardware, namely, pulleys, metal window pulleys, door panels of metal, tin cans sold empty, metal containers for the storage and transportation of goods, metal bins, metal name plates, metal holders for signboards, metal hardware, namely, springs, metal hooks, metal brazing rods, metal rods for brazing and welding.

Wu Y.,CAS Hefei Institutes of Physical Science | Qin J.-G.,CAS Hefei Institutes of Physical Science | Liu B.,CAS Hefei Institutes of Physical Science | Liu F.,CAS Hefei Institutes of Physical Science | And 13 more authors.
IEEE Transactions on Applied Superconductivity

The ITER magnet system is made up of four main subsystems: the 18 toroidal field (TF) coils, the central solenoid, the six poloidal field (PF) coils, and the correction coils (CCs). The feeder system, with its main busbar (MB) and CC busbar (CB), represents one of the main magnet components as well. All coils and busbars with different dimensions used cable-in-conduit conductors. China has signed three conductor packages, which are the so-called procurement arrangements, between ITER and the Chinese Domestic Agency (CN DA): a TF conductor package, a PF conductor package, and a CC and feeder conductor package. They include 7.5% of the TF conductors (11); all the PF2 (12), PF3 (16), PF4 (16), and PF5 (16) conductors; all the CC (18) conductors; and the MB (3) and CB (2) conductors for the feeders. Complex technologies have been developed by ASIPP for the serial production of all ITER conductors, in terms of cabling parameter design, welding, and elaboration of cable insertion, compaction, and winding processes. China has finished all qualification phases and is well into the main series production. All conductor samples required for quality control have successfully passed the SULTAN tests with good performance. The status of the production of ITER conductors in China is described in this paper. © 2002-2011 IEEE. Source

Su C.,Zhejiang Jiuli Hi Technology Metals Co. | Zhou Z.-J.,Zhejiang Jiuli Hi Technology Metals Co.
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing

HR3C seamless steel tubes were produced by hot-extrusion and cold rolling processes. The process of metal cold-forming and the performance of finished-products indicate that hot-extrusion and cold rolling processes have obvious advantage in manufacturing finished-products of high alloy steel with hard deformation. Metal withstands three-dimensional compressive stress during deformation in the hot-extrusion process, which can improve the comprehensive performance of metal pipes. The improvement of surface quality and dimension precision through cold rolling processing can ensure the higher safety of materials used in special environment. Source

Qin J.-G.,CAS Hefei Institutes of Physical Science | Wu Y.,CAS Hefei Institutes of Physical Science | Liu B.,CAS Hefei Institutes of Physical Science | Liu H.-J.,CAS Hefei Institutes of Physical Science | And 9 more authors.
IEEE Transactions on Applied Superconductivity

The design of poloidal field (PF) coils and correction coils (CCs) for the International Thermonuclear Experimental Reactor (ITER) relies on the use of 45-kA NbTi cable-in-conduit conductors. All PF5 and CC conductors are produced in China. Research and development programs are needed to acquire knowledge on the behavior of such conductors. Since the conductors are new, full-size copper dummy conductors have been produced in advance for testing the cabling parameters, the definition of the automatic tungsten-inert-gas welding of a seamless jacket section, the elaboration of cable insertion, compaction, etc. Then, two short qualification conductor samples (the PF5 and the CC) are manufactured at the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), Hefei, China, with the NbTi advanced strands produced by the Western Superconducting Technologies Company, Ltd. In this paper, the manufacturing procedures for the two PF5 and CC conductor samples are described in detail. © 2014 IEEE. Source

Zhao Q.,Shanghai University | Xia S.,Shanghai University | Zhou B.,Shanghai University | Bai Q.,Shanghai University | And 3 more authors.
Jinshu Xuebao/Acta Metallurgica Sinica

Alloy 825 is widely used for chemical and petrochemical applications due to its good combination of mechanical properties and corrosion resistance. However, intergranular corrosion (IGC) is one of the serious problems for alloy 825 exposed to aggressive environments, which could result in unexpected failures and lead to huge losses. The grain boundary structure, which can partly be described by coincidence site lattice (CSL) model, can influence the grain boundary chemistry and the susceptibility to intergranular corrosion. The field of grain boundary engineering (GBE) has developed a lot over the last two decades since the concept of grain boundary design was proposed. The aim of GBE is to enhance the grain-boundary-related properties of materials by increasing the frequency of low ΣCSL (Σ≤29) grain boundaries (GBs) and tailoring the grain boundary network. It was reported that in some fcc materials with low stacking fault energy, such as Ni-based alloys, lead alloys, austenitic stain- less steels and copper alloys, the frequency of low ΣCSL GBs can be greatly increased by using proper thermomechanical processing (TMP), and as a result the grain boundary related properties were greatly enhanced. In this work, GBE is applied to the manufacture of Ni-based alloy 825 tubes by cold drawing using a draw-bench on a factory production line and the subsequent annealing. The effect of thermomechanical processing on the grain boundary character distribution (GBCD) of alloy 825 was studied by means of the EBSD technique and orientation image microcopy (OIM). The results show that the proportion of low ΣCSL grain boundaries increase to more than 75% by the TMP after 5% cold drawing and subsequent annealing at 1050℃ for 10 min, and simultaneously the large-size highly-twinned grain- cluster microstructure is formed. The size of the grain- cluster and proportion of low ΣCSL grain boundaries decrease with the increase of pre-strain. The proportion of low ΣCSL grain boundaries decreases with the increase of the mean grain size. The annealing temperatures in the range of 1050~1125℃ have no obvious effect on the GBCD of the specimen with 5% cold drawing deformation; while the proportions of low ΣCSL GBs of the sample with 3%, 7% and 10% cold drawing deformation decrease with the increase of annealing temperature. © All right reserved. Source

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