Tangshan, China
Tangshan, China

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Tian P.,University of Electronic Science and Technology of China | Tian P.,Hebei Iron and Steel Co. | Zhong Z.Y.,University of Electronic Science and Technology of China | Bai R.G.,Hebei Iron and Steel Co. | And 3 more authors.
Applied Mechanics and Materials | Year: 2013

The interception products of vanadium processing as vanadium alloys were studied in producing vanadium-containing seismic resistant rebar. The experimental results show that vanadium alloying with intermediate products was feasible and low-cost. Compared with conventional production process or ferrovanadium alloying, applied vanadium slag alloying in producing HRB335E could save 12.45 RMB per ton of steel, applied vanadium ball alloying in producing HRB400E could save 21.23 RMB per ton of steel, applied V-iron alloying in producing HRB400E could save 11.06 RMB per ton of steel. © (2013) Trans Tech Publications, Switzerland.


Tian P.,University of Electronic Science and Technology of China | Tian P.,Hebei Iron and Steel Co. | Zhong Z.Y.,University of Electronic Science and Technology of China | Bai R.G.,Hebei Iron and Steel Co. | Zhang X.L.,Hebei Iron and Steel Co.
Advanced Materials Research | Year: 2014

Hot ductility behaviors of HRB600 vanadium-containing steel rebar was study with thermal simulation test and the fracture was observed and analyzed by scanning electron microscope (SEM). The result shows that, the contraction ratio of cross sectional area (Z) in 1050°C-1300°C was more than 60%, tensile sample showed good ductility; Z in 750°C-1000°C was less than 60%, tensile sample showed brittle, namely third brittle zone. Then third brittle zone should be avoided or minimize stays in the development process of continuous casting and hot rolling. The fracture mode and the morphology of fracture surfaces were different at different temperatures. © (2014) Trans Tech Publications, Switzerland.


Li F.-M.,Hebei United University | Yi F.-Y.,Hebei Iron and Steel Co. | Bai R.-G.,Hebei Iron and Steel Co. | Sun K.,Hebei United University | Lu Q.,Hebei United University
Kang T'ieh/Iron and Steel | Year: 2014

The binding phase strength of mixed iron ore with high limonite ratio was determined by micro-sintering apparatus at different sintering temperature, basicity and MgO content. The results reveal that, binding phase strength of mixed iron ore increased at first and then decreased as sintering temperature, basicity and MgO content increased. It reached the highest value when the sintering temperature was 1280 ℃, alkalinity was 1.6 and mass percent of MgO was 2.0%. Limonite ratio should be reduced appropriately in production, so that the mixed iron ore has adequate binding phase strength. ©, 2014, Chinese Society for Metals. All right reserved.


Tian P.,University of Electronic Science and Technology of China | Tian P.,Hebei Iron and Steel Co. | Zhong Z.,University of Electronic Science and Technology of China | Hui W.,Control Iron and Steel Research Institute, China | And 2 more authors.
Advanced Materials Research | Year: 2013

Uniaxial hot compression simulation experiment at 700 °C with different true strain was carried out to study the microstructure evolution of medium carbon steel, the predominant mechanism on the cementite softening has been explored, the experimental results show that the volume fraction of deformation induced ferrite (DIF) increased with increasing true strain and even exceeds the equilibrium content. With the increase of DIF, more and more carbon atoms congregated in the boundaries such as the interface of DIF and the interphase of DIF/deformation austenite. Carbon congregation provides the right carbon content and the optimized microstructure for divorced decomposition during the process of controlled cooling. Therefore spherical or rod-like cementite and degenerated pearlite can be obtained. © (2013) Trans Tech Publications, Switzerland.


Tang X.-H.,University of Science and Technology Beijing | Liu R.-Z.,University of Science and Technology Beijing | Yao L.,University of Science and Technology Beijing | Yao L.,Hebei Iron and Steel Co. | And 4 more authors.
International Journal of Minerals, Metallurgy and Materials | Year: 2014

Ferronickel enrichment and extraction from nickel laterite ore were studied through reduction and magnetic separation. Reduction experiments were performed using hydrogen and carbon monoxide as reductants at different temperatures (700–1000°C). Magnetic separation of the reduced products was conducted using a SLon-100 cycle pulsating magnetic separator (1.2 T). Composition analysis indicates that the nickel laterite ore contains a total iron content of 22.50wt% and a total nickel content of 1.91wt%. Its mineral composition mainly consists of serpentine, hortonolite, and goethite. During the reduction process, the grade of nickel and iron in the products increases with increasing reduction temperature. Although a higher temperature is more favorable for reduction, the temperature exceeding 1000°C results in sintering of the products, preventing magnetic separation. After magnetic separation, the maximum total nickel and iron concentrations are 5.43wt% and 56.86wt%, and the corresponding recovery rates are 84.38% and 53.76%, respectively. © 2014, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.


Qiu S.-T.,Control Iron and Steel Research Institute, China | Zhang M.-B.,Control Iron and Steel Research Institute, China | Zhang M.-B.,University of Science and Technology Beijing | Zhang M.-B.,Hebei Iron and Steel Co. | And 4 more authors.
Kang T'ieh/Iron and Steel | Year: 2016

Comprehensive utilization of Ti-bearing blast furnace slag has long been hot and difficult research topic in solid wastes field of iron and steel industry. Current situations of comprehensive utilization of Ti-bearing blast furnace slag was summarized, and the technology of comprehensive utilization and industrialization difficulty and effect on the environment influence was indicated. The results show that extracting titanium process is relatively complex, with high energy consumption, harmful to the environment by strong acid or alkali, and high temperature chlorination or carbide from titanium-containing blast furnace slag. It shows that it is wasteful for the titanium to use Ti-bearing blast furnace slag to make building materials although it is environmentally friendly. Ti-bearing blast furnace slag can be fully used by being made catalyst, antibacterial materials and fertilizer and no tailings and pollutants are produced. A variety of compositions in Ti-bearing blast furnace slag should be used comprehensively, to improve the ratio of comprehensive utilization and make comprehensive utilization of Ti-bearing blast furnace slag harmonious with environment. © 2016, CISRI Boyuan Publishing Co., Ltd. All right reserved.


Yang X.-J.,Control Iron and Steel Research Institute, China | Yang X.-J.,Hebei Iron and Steel Co. | Zhang H.,Control Iron and Steel Research Institute, China | Hu P.,Control Iron and Steel Research Institute, China | And 3 more authors.
Journal of Iron and Steel Research | Year: 2014

According to the measured copper plate temperature, the cooling water volume and the inlet and outlet water temperature of mold, the one-dimensional and modified heat flux calculation model and its distribution surface were developed which are in new-style non-uniform cooling copper mold of Tangshan Iron and Steel Co., and heat flux distribution characteristics were analyzed at different conditions when SS400 steel was produced. The results show that heat flux and hot surface temperature distribution trend is consistent generally at the same condition. The flux fluctuation is choppy along the width direction. The peak of heat flux of the mold is located 400 mm from the center, and distance to the meniscus is the more recent in the more severe. The heat flux is low on the center at lower part of mold, and the heat flux in straight section is lower than funnel region. In the casting direction, the heat flux and hot face temperature change rate of mold are low. There is a heat flux and temperature recovery area in mold central obviously. The heat flux is high and the hot surface temperature is low on the wide surface of the entire copper, and it is positive significant for improving mold life.


Chen M.,Northeastern University China | Tian Z.,Northeastern University China | Yu Q.,Northeastern University China | Gao Z.,Hebei Iron and Steel CO.
Advanced Materials Research | Year: 2011

The metallurgical behavior of adjusted converter slag components during the selective reduction process were investigated by thermodynamic calculating with different modified slag composition, addition of reducing agent and reduction temperature. The activities of main slag components were drawn from the calculated values. The results showed that the activity of SiO2 increased with increment of its mass fraction in slag. The solubility of SiO2 increased with increment of temperature. The selective reduction was promoted by selecting the appropriate amount of modifier. Reduction order was elucidated in this paper, Fe was reduced from the slag followed by P, Mn and Si and the reduction rate of Si could reach about 51%. The metal phase was rich in Fe, Si, Mn and P as a result of the selective reduction. © (2011) Trans Tech Publications, Switzerland.


Lu C.-B.,Hebei Iron and Steel Co.
Kang T'ieh/Iron and Steel | Year: 2015

The metallurgical structure of the specimens with higher strength is detected by optical microscope, and there is more than 50% pseudo-eutectoid pearlite in the specimens, resulting in an effect of remarkable pearlite strengthening. Conclusion of comparative analysis of different process is that far more than balance content of pseudo-eutectoid pearlite can be gotten by inhibiting proeutectoid ferrite transformation and making final cooling temperature lower than the Ar1 of air cooling. The factors influencing the proeutectoid ferrite transformation during laminar cooling are discussed in this study. ©, 2015, Chinese Society for Metals. All right reserved.


Wu D.Y.,Yanshan University | Pei J.P.,Yanshan University | Gong Y.L.,Hebei Iron and Steel Co. | Fan W.B.,Hebei Iron and Steel Co. | And 2 more authors.
Materials Science and Technology (United Kingdom) | Year: 2014

The dynamic recrystallisation (DRX) and static recrystallisation (SRX) behaviours of three V-Ti microalloyed steels were studied by the analysis of the true stress-strain curves and the stress relaxation curves under different deformation conditions. The results of DRX showed that deformation activation energy Qdef, peak stress and peak strain increased, as a result of the solute strengthening and dragging effect due to Si. The results of SRX showed that Si increased the SRX activation energy QSRX. The solute retardation parameter for static recrystallisation of Si was calculated. Based on the SRX results, to quantify the drag effect of Si and V, a new model was proposed to describe the time for 50% recrystallisation (t0·5), which was tested and verified by previously published data on similar steels. Precipitation during recrystallisation could lead to a lower value of the Avrami exponent. © 2014 Institute of Materials, Minerals and Mining.

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