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 Wysłany: Nie 23:34, 09 Sty 2011 Temat postu: moncler günstig Die structure of the squeeze cast |
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Die structure of the squeeze casting Al-Cu alloy hot cracking tendency of
Away from the hot runner section side of the test rod parts, and in the near side of the hot runner section does not appear near the sprue side of the hot cracking, hot section parts of test bars with the Division through the cake runner connected to feed cake part of the liquid metal does not flow through the runner, less shouting and die of heat exchange, heat losses relative to the set of Java packages greatly reduced. And its bulky, analog to digital is much greater than the set of Java packages, so close to the end of the hot runner section runner for the position can be expected feeding channel feeding cake cake melt flow In addition, as expected a longer time, in the packing time, feed cake to pass the pressure inside the molten metal there, so the role of liquid metal under pressure even more, a mining school before kneeling minute fly with easy flow of feeding, it is near the end of the hot runner section is not part of thermal cracking Numerical Simulation of 3 established a three-dimensional real l Upon casting model, and related analysis software for foundry simulation squeeze casting, casting obtained the temperature field in different periods (see Figure 5) Figure 5 before and after the mold is not modified temperature field of casting results. Can be seen from Figure 5a. Taijin late in the solidification,[link widoczny dla zalogowanych], a large number (calf County near the steep initial solidification ¨ 1 modified edges with medium-term prince Yu Chong Li _ Casting ¨) thiophene changed after the training pieces filled din benzene solidified pieces of Figure 5 copulate teach the value of simulated temperature field ( . Yao injection temperature was 750, bandit force 80MPa1 solid skeleton has been formed, the set of Java packages have been lower than the temperature of the hot rod test section (variable cross-section) parts of the temperature, but below the solidus temperature, can not achieve Feeding heat back section can be seen from Figure 5b. castings expanded set of Java packages, and the bridge power expanded, late in the alloy solidification. When the central temperature of test bars have been reduced to the solid phase temperature (550 ℃) below, the set of Java packages and hot section parts of the temperature of about 580, were higher than the temperature of test bars, the middle section, and in the solid-liquid coexistence temperature zones,[link widoczny dla zalogowanych], set the Java package is not solidified Taijin solution can be achieved on the hot spot sites feeding back with the longer holding time, from Figure 5c and Figure 5d shows the temperature distribution of test bars, set of Java packages from the center to increase gradually to the solidification of late, the last bit is a solidification of the total heart of Java packages Department, so try to achieve on hot rod parts feeding section 4 Conclusion (1) solidification of liquid metal is to reduce the effective feeding an important way to hot tearing tendency. In squeeze casting, the metal solidified the late great pressure loss When the set of Java packages within the casting modulus greater than the hot section of adjacent parts of the module, the set of Java packages within the liquid metal can serve as a feeding source to the hot parts of the feeding section (2) modified in the mold to expand the set Java package size and to expand the set of Java packages and the casting channel, greatly reduced the Al-cu Taijin of hot tearing tendency of alloys to modify the mold before the hot cracking rate of 27% to 6%, greatly improving the yield reference I peer at the sea literature. Wang Li transition, such as casting temperature on the meaning of Q then M-SCu squeeze casting box of Taiwan Casting co-plate .2006.26 c 【1:43 ~ 452 Dong Sheng full. TRANSACTIONS OF. Yan Man. and so on. Micro Wall J death factor on AI-c5 sets box mechanical properties. Special Casting and Ran-what Taijin, 20 (} 311): I6 ~ l93YangI 』TheElleelIIrC ~ lingJlempemlure ∞ rPn:. pertiest, fS ... C Ⅱ AluraJnumandZincAllcJoul ~ a] nrMttterlalzPr (~: essin $ 1hnol (BU gY.2003.I40: 391 ~ 3964 Chen Bingguang liquid forging die is designed Wuhan: Huazhong University of Mu .19895 Likui Sheng Tai Chao-publishing. ugly casting process works. North Li: Machine Peach i, lk a pile social .1987.6 Wang Yeh-double. Wang Ju east. D husbands river. and so on. Taiwan, the hot tearing mechanism of plate bearing in mind their special a string of non-ferrous foundry buildings Taijin .2 o00 (2:48-50 (Editor: Yuan Zhenguo) f A ~ ~ 1111111 ~ + 』j {T China Nonferrous Metals Industry,[link widoczny dla zalogowanych],\achievements and {: t ten first. five results are: (D steady growth in production; ② substantial increase in economic efficiency {TI: ③ foreign trade import and export volume continues to rise; @ fixed {I significantly increased fixed asset investment deduction; ⑤ energy saving achieved remarkable .. 10jj non-ferrous metals production for 4 years out in the world. It 10: {=: non-ferrous metals are: aluminum (aluminum), lead, zinc,[link widoczny dla zalogowanych], tin, antimony, Huan, mining; = t; Hill tungsten,[link widoczny dla zalogowanych], rare earth, copper .. In addition, China's refined copper and aluminum production line {{{volume in the world - II. {l ÷ c Original contains \10) j79l Ting Lan Instant 『luxury meat ix II
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