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 Wysłany: Czw 1:49, 30 Gru 2010 Temat postu: ugg italia Manganese in low alloy ductile iron bal |
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Manganese in low alloy ductile iron ball application
45mm, weight of 245 and 35okg. In the original production process, the main problem is in the process of heat treatment for hair spray cooling,[link widoczny dla zalogowanych], only the amount of a typhoon 20000M / H axial fan cooling unit, so that the crankshaft at both ends of the spray density of the central and inconsistent, this cooling caused by the difference between the hardness of HB20 ~ 30 affect performance. Spray when the crankshaft and for vacant rotation, could easily lead to axial deformation (up to lO ~ 12mm), resulting in severe machining scrap. While this spray cooling technology not only for its serious adverse impact to the environment moist and costs. To this end, according to domestic and foreign production of large cross-section ductile iron crankshaft of experience,[link widoczny dla zalogowanych], we have adopted the method of copper alloy,[link widoczny dla zalogowanych], heat treatment to remove the spray cooling process in order to achieve the purpose of improving performance of the crankshaft. First, the appropriate Cu, Mn content of the crankshaft of the control components () as. 3.4 ~ 3.8C,[link widoczny dla zalogowanych], 2.2 ~ 2.6Si,[link widoczny dla zalogowanych], <O. 03S, <0.1P, 0.04 ~ O. 06Mg, 0 �� O3 ~ O. 05Re. From Table 1 results and performance to be integrated, so we choose the Cu content of 0.6% Cu based on the amount of certain circumstances, with different Mn content obtained by normalizing after working there in Feng Gao Cheung Wing, Lu Qi Gu , Qiu Yueming and so on. The results (Table 2), Mn content determined by O. 5 below. Ancient atlas 1 c \680.8005580.403.5 {245-25585-0O3.8240-25O8O a 85 = degree of normalization with the cooling ju Figure 1 indicate normalizing temperature on the copper alloy pearlite ductile iron content of the crankshaft, that is normalizing higher the temperature, the higher pearlite content and tensile strength, but the elongation decreased slightly, when normalizing the temperature increased to a certain value, not increase the amount of pearlite. mechanized units from performance considerations, the selected temperature normalizing to 880 ��. from the effects of spray cooling and air cooling of view, although the faster cooling rate is conducive to refine and improve the mechanical properties of pearlite, but the dispute is the crankshaft spray}, the bending deformation than to be cooled by air, (3 ~ 4mra Figure 1 c, large section of crankshaft crankshaft bending the bending deformation is often out of our plant waste it, mainly due to:. with the heat treatment furnace placement just a great relationship. As the crankshaft at high temperature modulus of elasticity significantly. rigid very poor, which often lead to deformation by weight. For as long as 2055n1n1 the 6160 crankshaft, when placed in the heat treatment furnace, the crankshaft should be the first, three, four, six Shui flatbed on. in the vacant two, five Shui into the support under the horn to ensure that the casting of the weight reduced to minimum bending load changes, thereby reducing the bending deformation of rough. 2. normalizing temperature and cooling effect. Test and dinner practice shows that the crankshaft of the normalizing temperature deformation at 880 �� called g20 �� u less than about 1 / a ~ 1 / 2, so copper ball of iron crankshaft Taiwan should be controlled to a normalizing temperature was 880 ��, as on the above, due to the existence of the crankshaft spray cooling method and spray uneven suspension problems and, therefore, prone to bending causes the crankshaft of a reason not to be ignored, and the resulting obsolescence of the crankshaft 10 ~ 15,] Jl ~ Cu crankshaft is also up to 5. Therefore, additional Cu ductile iron crankshaft, shall be exempt from this cooling. Boron Copper Iron pressing roller Li Zhong Kangcai Dan Yunnan, Jiangsu Institute of Light Industry Machinery Factory first quarter Zhiming �� Abstract mathematical methods, adding the right amount of B and Cu, the wear resistance of cast iron pressing roller, holding cane force, anti-collapsing ability of teeth and the production process of performance than those used recently in Yunnan, there are a variety of pressing rollers to further improve and sugar has been identified using the authentication and provincial soil. Yunnan Province, the First Light Industry Machinery Factory is the focus of supporting the production of sugar and its accessories in the sentinel plants. The original production of pressed roller inconsistent quality, users have different reflection. major problems poor wear resistance is pressing roller, holding cane weak, life is short, easy to collapse teeth, factory urgent need to address this quality issue. end with the first Light Industry Machinery Factory in Yunnan Province and Kunming Iron and Steel Steel Institute for Cooperation The problems were pressing Roller. I. Roll bar requirements and the development of materials produced by the press roll is currently 500 tons / day of sugar, accessories, wall thickness of 126 ~ 145mm, length 1.2N1.4M and weighing about 1600kg. foundry casting used ladder, feeding by two straight 'interpretation Shiqiang, Lai Weixin, 80 students in compulsory service I, king bee bomb, south of Wu, Zhang, Zheng Zhiyun, Jiang Likang to participate (or participate in part) development work _38
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