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 Posted: Thu 1:52, 30 Dec 2010 Post subject: ed hardy Bearing surface and prevent the generatio |
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Bearing surface and prevent the generation of depression
Facilities, so that basically under control of such defects, ensuring product quality. Ductile iron bearing one of the railway vehicle accessories,[link widoczny dla zalogowanych], technical conditions are higher, our factory with an annual output of about 40,000, weight 400 tons, the output value of 120 million Diego. This piece of statistical classification of waste, for a variety of casting defects caused by the rejection rate (accounting for the total waste) as shown in Figure l, shows that the proportion of retirement due to a large depression, and is characterized by small number of occurrences that if there is bulk,[link widoczny dla zalogowanych], high rejection rate more than 90 election. The analysis of the influencing factors and take appropriate prevention measures, this defect is basically under control, the rejection rate from the 6O reduced to 2O% less. 3l bear called whistle on foul anvil ring it is set Ge Zeng 1, a vine, bearing the technical requirements and casting process in Figure 2 is a bearing body parts diagram, the material is QTso a 5, the hardness requirements 17O ~ 229HB. --. A ..., Figure 2 bearing the shape of the body is relatively simple,[link widoczny dla zalogowanych], uniform thickness (30rn! thick), gross weight 10kg, module 5c, so no-take [J casting process (hug 3), a closed water system,:,; . ll,. : Eleven: Circle 42. Factors and prevention measures on the actual observations bearing depression and statistical analysis showed that the factors that affect this defect is: (1) C and graphite si promote the increase of the graphite expansion force of the reason that the levels increase help make stunning 101 uH 31, said one side of bridge contraction, which is particularly important in the non-riser casting this end, we control the C content of 3.55 ~ 3.85, L'E 4.40 ~ 4.70 range. On the other hand, P content on the impact of significant shrinkage, and thus its relationship with the depression shown in Figure 5, show that the P content of> 0.08% yield when the Falcons put make bush depression, with the P content increases after tends seriously, when the P content of> 0.18%, the depression, the situation becomes very serious. For the strict control of the P content, we charge placed on the classification and sub-heap, to strengthen its management; between phosphorus in iron smelting, the stress increased melting across the sequence and string and other materials to prevent focus. Phosphorus P Wedelia. Ten Mg circle 5NRe residual effects of depression, cut out the situation shown in Figure 6. Show that the residual amount of Re + Mg> 0.13 when there will be a slight depression, and later, with the residual increases, depression aggravated. In view of this, we were Mg and Rc residue control in 0.03 ~ O. 05 and 0.02 to 0.04% range. Circle 6 (2) degree of mold cut is particularly important for the non-riser casting, practice shows that when the sand surface hardness of less than 75, bearing a slightly larger exterior dimensions, and only the sand surface hardness greater than 90,[link widoczny dla zalogowanych], the bearing dimensions can only remain unchanged. To ensure the sand surface hardness of not less than 00, the radio press working pressure should be> BKgiem, such as less than this value can be used when the second shot and then squeeze the method of sand, so that the stiffness of the mold is guaranteed, and prevent depression generated. (3) mainly affects the pouring temperature of liquid inside the gate in time contraction and solidification shrinkage and the formation of an impact on production-proven that water temperature control in the 1330 ~ 1200 ��, casting speed of 25 to 35 seconds of each cage is appropriate . * Bearing the body of the casting process design from the factory pre-condensate Ball Comrade Li Xuelin PROCESS OF Heilongjiang Taylor automobile factory floor, high source of tin pigeon Jiang Qun Liang Abstract globalization process by pre-condensate production @ S0.07 ~ 0. O95% of high s iron bearing the QT42-10 grades of automotive castings, ball agent added in the amount of 1.0 to 1.3%, the ball grid of 100% of the units, both 1 and 2 class, 47 ~ 67. 5kg/mm, dl0 ~ 24%. The introduction of the Austrian company Steyr heavy truck vehicle is my 90's for store products, our factory is mainly produce the cars, and take on a car chassis song I; I tasks. The supply of quality pig iron, so they use the local high s pig iron, the use of pre-coagulation treatment process of globalization, the successful production of the car's QT42-1O grade castings, thus ensuring the updating and modification of motor vehicles export tasks to complete the casting. 32 First, the production conditions in the cupola melting,[link widoczny dla zalogowanych], the amount of containing s 0. 07 ~ O. 095% of the local pig iron production QT42-10 brands of automotive castings, we have used small ball of too much sodium dosage and processing outside the furnace off s approach to graph containing s address high levels of iron treatment to bring the ball hard problem, but the effect is not obvious, even if the increase in dosage of the ball of the coconut to 2.0, the ball is not Taiwan
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