Chengde, China
Chengde, China

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Wu W.-N.,Hebei United University | Lu Q.,Hebei United University | Wan X.-Y.,Hebei United University | Bai R.-G.,Chengde Company | And 2 more authors.
Kang T'ieh/Iron and Steel | Year: 2013

The content of vanadium and titanium in Chenggang iron powder is high, which makes the sinter's RDI and drum strength bad. By the sintering basic characteristics tests of three kinds of iron ore in Chengde Iron and Steel Co., Ltd., and compared with the drum strength of single iron ore sintering under the same condition, the effect of sintering basic characteristics (such as assimilability, fluidity of liquid phase, self-intensity of adhere phase, crystal intensity) on drum strength in Chengde Iron and Steel Co., Ltd. was investigated, which will provide basis for reasonable iron ore blending.


Gong Y.,Chengde Company | Wu D.,Yanshan University | Fan W.,Chengde Company | Guan C.,Chengde Company | And 2 more authors.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2013

The influence of wire rod rolling process on microstructure and property of a V-bearing medium carbon steel has been studied by the simulation on a Gleeble-3500 thermo-mechanical simulator. The results show the grain size decreases remarkably with the decrease of the deformation temperature. The deformation temperature and spinning temperature have a little effect on the amount of ferrite and hardness; however, the volume temperature and cooling rate have a great effect on the amount of ferrite and hardness. With the increase of spinning temperature, volume temperature and cooling rate, the amount of ferrite increase and hardness decrease. However, with the increase of deformation temperature, the amount of ferrite and hardness decreased because of coarsened microstructure. Based on the results, a relationship between processing parameters and amount of ferrite and hardness was established.


Gong Y.,Chengde Company | Wu D.,Yanshan University | Guan C.,Chengde Company | Fan W.,Chengde Company | And 2 more authors.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2013

The CCT diagrams of V-bearing microalloyed steels without and with deformation have been constructed by using the means of a Gleeble-3500 thermal mechanical simulator, and the effects of V and N content on microstructure and CCT diagrams were analyzed. The results show that increasing N content in V-bearing microalloyed steels can accelerate the precipitation of V carbonitride, ferrite transformation, and refines the microstructure under room temperature. Furthermore, these effects are more obvious under deformed austenite condition. Therefore, increasing N content can decrease the V content appropriately, which can save production cost.


Li Y.-J.,University of Science and Technology of China | Lu Q.,University of Science and Technology of China | Bai R.-G.,Chengde Company | Cui S.-Q.,University of Science and Technology of China | And 2 more authors.
Kang T'ieh/Iron and Steel | Year: 2016

According to the conditions of Cheng Steel blast furnace, the current study used pulverized coal injection of Cheng Steel Blast Furnace as raw materials and used pulverized coal combustion furnace to simulate the combustion process of actual pulverized coal in the tuyere zone. The influence of titanium-bearing slag diluents, such as CaF2 and MgO added into the pulverized coal on the combustion performance was discussed. The scanning electron microscopy (SEM) was also applied to observe the change of structures on the surface of coal powder. Main results show that the addition of CaF2 could improve the combustion ratio of pulverized coal in the blast furnace, while the benefit was not so obvious, though the unburned coal particles decreased in size. The coal combustion ratio increased significantly with the addition of MgO. When the mass percent of MgO was 1.20%, the coal combustion ratio increased by 12.41% and the average diameter of unburned pulverized coal was 4.30 μm, which was 5.48 μm smaller than that without the addition of slag diluent. On the other hand, the addition of MgO made the size and the distribution of pulverized coal become uniform. Combining the effects of the addition of MgO on the slag dilution and the combustion ratio, the study concluded that the optimal mass percent of MgO was 1.20%. © 2016, Chinese Society for Metals. All right reserved.

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