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Liu X.,Jiangsu Xingda Steel Cord Co. | Liu X.,Jiangsu Key Laboratory for Structural and Functional Metallic Composites | Ni Z.-F.,Jiangsu Xingda Steel Cord Co. | Ni Z.-F.,Jiangsu Key Laboratory for Structural and Functional Metallic Composites | And 6 more authors.
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

Microstructure evolution of hypereutectoid steel wire during the drawing process (drawing strain: 0, 0.54, 1.58, 2.29) was studied by SEM, TEM, XRD and VSM, and the texture evolution in the deformation process was viewed by EBSD. The tested results show the cementite in the hypereutectoid steel has good deformation ability. With the drawing strain increasing, cementite slices in the steel can align with the drawing direction by bending deformation, shearing deformation and drawing deformation etc. Finally, the cementite slicecan deform into fibrous tissue paralleled to drawing direction. Moreover, partial dissolution of cementite can be observed after cold deformation. The quantitative tests show that the dissolution of cementite can increase correspondence with the increasing strain. The increase of lattice constant in ferrite matrix, a slight left shift in the ferrite diffraction peaks are due to carbon atoms dissolved into ferrite crystal. The intensity of <110> fiber texture in ferrite which formed and paralleled the drawing direction during the drawing process gradually can increase with the drawing strain increasing. ©, 2015, Editorial Office of Transactions of Materials and Heat Treatment. All right reserved. Source

Xu L.-M.,Jiangsu Xingda Steel Cord Co. | Xu L.-M.,Jiangsu Key Laboratory for Structural and Functional Materials Composites | He G.-R.,Jiangsu Xingda Steel Cord Co. | He G.-R.,Jiangsu Key Laboratory for Structural and Functional Materials Composites | And 8 more authors.

(Ti, V)C dispersion strengthened 304 stainless steel was fabricated by in-situ reaction technology. Microstructure observation reveals that the distribution of the added (Ti, V)C particles with the size of 4-10 μm is basically uniform in the matrix, but slight aggregation of particles is observed in a few areas in the microstructure. The addition of the (Ti, V)C particles into the 304 stainless steel results in a significant increase of the tensile strength at both the room temperature and the high temperature, but a decrease of the ductility and the toughness. Compared with the 304 stainless steel matrix, the creep resistance of the 304 steel strengthened with the addition of the (Ti, V)C particles increases notably at the temperature of 700℃ and the applied stress of 100 MPa. ©, 2015, Chinese Mechanical Engineering Society. All right reserved. Source

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