 Wysłany: Sob 3:02, 08 Sty 2011 Temat postu: ugg prezzo Low Carbon High Strength Dual Phase and |
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| Low Carbon High Strength Dual Phase Steel Microstructure and Properties
State. Also found in the deformation process has become drawn steel wire lath martensite direction of distortion occurs L8]. (A) 8 = 48 (b) 8 = 79 sub-plans 6840C 250C temperature quenching and tempering of martensite phase in the form of organization during the change of wire drawing TEM observations showed that the duplex wire drawing process in depth , the martensite dislocation cells within the elongated bar easily, but ferrite dislocation cells was multilateral shape, as shown in Figure 6 (b) and Figure 7. The reason may be related to more than ferrite carbide precipitates the dislocation line,ugg prezzo, and was related to the distribution of multilateral shape, it is easy because of the deformation process of pinning the dislocation line of carbide and the formation of dislocation cells multilateral shape. Martensite lath boundary carbides mainly along the grain boundaries or twin and lath boundary by pinning or twin boundaries and dislocation cells form a long strip of the foundation. Drawing process in depth, with the martensite is deformed elongated martensite high density of dislocations within the re-distribution, and gradually move was lath boundary carbides pinning or twin boundary, and finally the formation of long the shape of dislocation cells, the cell wall is essentially a large number of dislocations by the formation of tangles and dislocation walls, and a small number of intracellular dislocation. Since the formation of dislocation cells, steel is significantly enhanced, and to maintain a certain degree of plasticity and toughness,air jordans, resulting in tensile strength, bending and twisting properties of the best fit. Figure 7840C 250C subcritical quenching and tempering phase organization by the depth of drawing (790A) cable after the formation of dislocation cells in vivo morphology of 2.2 found in the mechanical properties tensile strength steel wire controlled mainly by two factors: Martensitic volume fraction and shape variables. The general trend is steel with martensite volume fraction and the increase in deformation, the tensile strength steel wire. Volume fraction of martensite increases with the number of bending, torsion frequency change is complex, as shown in Figure 8. Martensite volume fraction was 89 with the wire after drawing 79 Form variables to get the most number of times the number of bending and torsion. 100 martensite microstructure ≯ 1mm wire bending and torsion can not get good performance. This phenomenon in the lath martensite matrix with evenly distributed on the small island of ferrite, ferrite and martensite of deformation between the good coordination is conducive to the improvement of plastic wire, so that the martensite volume score of 89 duplex bending and twisting properties of the organization as well. 2IlJIlt; III1IH martensite volume fraction,% Figure 8 wire deformation and bending frequency of the volume fraction of martensite (a), to reverse the number of (b) relationship between the 3 Conclusions (1) With the sub-temperature quenching temperature , sub-martensite dual-phase structure of the organization by the twin crystal becomes dislocation type, two-phase deformation capacity and drawing performance have been improved. (2) subcritical quenching temperature on the morphology and volume fraction of martensite changes in the mechanical properties of steel wire. (3) deformation in the number of dislocations and the formation of the organization in two-phase dislocation cells of the main factors. (4) high temperature subcritical quenching by the deep drawing steel (79),ugg milano, we could get good strength, bending with the number of times and reversing. References: [1] Xiaomin. Development of low carbon steel wire rope testing phase of [J]. Metal products. 1986,12 (6): 2. [2] with gold. South Shenghui. Lv Xiaoxia, et al. High-strength steel,jordan shoes, dual phase 20 the best heat treatment of steel [J]. Thermal processing technology, 1995, (4): 32. [3] ShenHP, LeiTC. Shearlaganalysesofthestrengthofdual-phasesteels [J]. MetalScience, 1984,18 (5): 257. [4] NakagawaAH. homasG. Microstructuremechanicalpropertyre-lationshipsofdual-phasesteelwire [J]. Met. Trans. . 1985, l6A (5): 831. [5] Su Deda. Mr Gong. Heat phase wire H08Mn2SiA tensile deformation and fracture properties [J]. Metal products. 1995,21 (2): 4. [6] Sui Xiaohong. Zhao Xiaoping, while Chung Shui. Nb dual phase low carbon silicon steel and wear a mesh [J]. Iron and steel. 1999,34 (4): 48. [7] End of the Great Patriotic. Peng Dacheng. Production of hot rolled dual phase steel wire rope of wire drawing process [J]. Metal products,ugg italia, 1999,25 (2): 7. [8] Yang Liying. High-strength low-carbon ferritic steel of a martensite microstructure and properties of two-phase [D]. Harbin: Harbin Institute of Technology, 1988. ● 642 ¨ 864 \ 相关的主题文章： 文章不存在java.io.FileNotFoundException ugg milano Trace elements B, Zr structure of nicke stivali ugg Annealing process on ultra-low carbon |
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