jordan shoes Deep processing of fine wire producti

,[link widoczny dla zalogowanych]
Wire processing fine-PC steel bar production

8d 10h relaxation under stress to <1.5%. Heading strength to reach 0.9a, coil steel coil when the supply started playing straight and so on. Control in the performance of three important issues that affect PC performance and bars often overlooked issue. First, the temperature detection, display and control. If the temperature detection, display and control a problem, PC steel bars can not guarantee the quality. Second, the stability is to take wire, steel wire must be continuous and steady access to the same sensor location within the sensor bar can not shake. In theory, the workpiece should be located in the geometric center of the sensor, if the steel is too large off-center, close to the sensor side of the part of the current density, temperature is too high, ranging from apparent temperature, even if the strength test can not be detected also will affect the PC to start playing straight of Steel Bars; while in local melting, playing spark, resulting in waste. Therefore, the pinch induction heating process must be stable. Third, continuous heat treatment line tension should be imposed on the function of reinforcement (ie, devices). Practical and theoretical studies have shown that in certain bars Photo 1PC SEM microstructure of the metal form 24 Volume 24 Shanghai tensile fracture surface in Figure 2 to force the state to improve the heat stability of Pc bars have a decisive role in relaxation . Conditions in the first approximation the axial tension can be considered to be one-dimensional role of stress, stress the role of the dimension of the crystal to the other bits in the heating state of the dislocation can not be adjusted to move dislocations, quench hardening was retained, formed at room temperature under axial stress state in a stable condition. Induction Hardening temperature, although high, but due to very fast heating, the internal organization of steel is still very small and dispersed. Figure 1 is 30MnSi quenched steel in 920 ℃, 465 ℃ tempered form of scanning electron microscopy; Figure 2 is a sewing fossa fracture morphology. References [1] such that Shun Sang. High-strength prestressed steel production technology. Hebei Metallurgy. 1999 (4): 35 ~ 37 [2] Nashunsang, eta1. StabilizingtechnologyandmechanismofPCbarICME2000BEIJINGCHINAMACHNEPRESS Received: 2001.12.20 七七七七七七七七 7,777,777,777,777,777,777. _ 【¨····'···· ● ●!; Information Report; ● ● 1. . 1. . . . ● successful development of new ultra-low cost Pohang nanomaterials Pohang Institute of Industrial Science and Technology (RIST) has developed a revolutionary new production methods, use it to mass production of carbon nanotubes and nanofibers, the cost of production method is only in the past O is usually one per cent, the production of carbon nano-materials, new technology and new product delays due to high cost of the promotion, now through the development of the RIST innovative production methods, nano-materials, cost of production dropped to accelerate its nanotechnology product development, will appear in the relevant market is also thriving scene. Early production of carbon nano-materials related to the use of such as iron, nickel and cobalt metallurgy element as a catalyst. However, these catalysts will reduce the size to a nanometer (10 billionths of a) the process cost is particularly high. RIST's Kang Boshi and the project team method by decomposition of the catalyst, so that the metallurgical temperatures above elements in the 6o0 ℃ (in this case a higher ratio of carbon and hydrogen) naturally transformed into nano-sized particles. This new method greatly reduces the cost of production of carbon nanotubes. Dropped from 100 dollars per gram per gram of a US-Wu. With electron discharge characteristics and excellent chemical and mechanical properties, carbon nanotubes and nanofibers will be the next generation of electronic equipment and mechanical devices for the manufacture of materials. They are currently used to produce a variety of displays, lighting, fuel cells, secondary batteries, medical devices and semiconductors. Expected that by 2005, global market value of carbon nanotubes and nanofibers is expected to reach 330 trillion won. Currently, RIST has registered five patents - including the \In addition, RIST is also planning to build manufacturing plant samples of carbon nanomaterials, and in 2005 its annual production capacity of the second half of 1t, and the sample supply of cheap South Korean industry and research institutes to support research in related fields. Photo to Chinese translated ((POSCONEwS \
相关的主题文章：

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]

The post has been approved 0 times