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Semi-solid forging process parameters on the microstructure of ZA27 alloy forming


Increases. The proportion of liquid decreases as the deformation temperature decreases. This is due to different causes deformation temperature of the solid fraction semi-solid ZA27 different. So that the semi-solid ZA27 m sample during deformation is different deformation mechanisms. When I state accounts for half 【ZA27 deformation temperature is low (465 - 470 ℃) high rate of solid phase within the sample. Under stress in the non-symmetrical. Children almost liquid sample quickly pushed to the edge of the plastic deformation of solid core part is dominated by edge-based solid-liquid mixed flow mechanism when the temperature rises to a suitable solid fraction in the sample H} (475, -485 ℃), the deformation always mixed with the liquid flow and solid particles in the main sliding mechanism, until the late deformation of contact between solid particles plastic deformation, so abundance on l the uniform deformation. When the temperature continues to rise, solid fraction decreases,[link widoczny dla zalogowanych], the center to the main flow of solid-liquid mixed phase flow of the edge to the main 12] 2.2 The deformation rate on the microstructure of ZA27 Figure 5 were semi-solid ZA27 Alloy at 475 ℃, the different changes I} [; rate in the second half with the state of forging deformation typical organization. It can be seen in semi-solid zA27 low strain rate, deformation of the edge of the sample there are many micro-particles together to form a product called \Evenly distributed within the liquid sample,[link widoczny dla zalogowanych], the grain size difference is not very clear: \Ren Health cluster is due to phase particles in a suitable position to the primary phase particles during the collision. At the contact point,[link widoczny dla zalogowanych], \And has been integrated into a product cb1475 \■ ■ ■ ■ a ■ () Heart Ministry,[link widoczny dla zalogowanych], 490 ℃ (b) edge, 490'C \a) 475'C, strain rate O05 × 100,475. C. deformation compliance string 005s. x20O Figure 5L, ~ k27 Taijin different Mi Fu Gu F-shaped state of half-speed forging down after the group I grains. The particles cluster is generated late in the solidification process. goods are only asked the local grain close together. this time due to large blocks melt, stirring enough in welding together of these scattered particles. So they are retained. the formation of \cluster \deformation force and increasing deformation rate can offset this ten interference test results show that when the change Jf; rate is low, the \when the solid grains were \effective fragmentation. separated into baseball shape,[link widoczny dla zalogowanych], nearly spherical granulated product to organize a (2) semi-solid forging temperature is too low touch, solid fraction increased. easily lead to decreased plasticity: Rong Cheng temperature, liquid was increased. Easy flow phenomena led to forming temperature is about 475 ℃ more appropriate, when forming the workpiece surface is smooth and dense internal organization (3) semi-solid forging deformation rate is low, the deformation of the specimen laterals f: there are many rough crystal emblem together form a so-called \fart References: [I] Shen-Zhang Chen-Kan Qiao Mi touch with the poison forging techniques, materials and ugly Tho process should be just fJ1 car shaking .200】 village j,) :13-141Hwang] ae-Ho. KoDe-CheolMinGyu · SJkFiniteeimentsimulationandexperimentforextrusionofsemi-solidA2024 [J】] ntenationa] JotlmalofMachineTools & Manufacture. 20 (40: l3II-I328 【31 despair squares. Liang startling life. 诲 hanging near the water wearing a financial knock lM]. Beijing: Cloth Field Disk 1l industry publication in 2001, \
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