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Qu Y.-D.,Shenyang University of Technology | Liu T.-B.,Shenyang University of Technology | Sun X.-Z.,Shenyang Casting and Forging Industrial Co. | Li R.-D.,Shenyang University of Technology | Bai Y.-H.,Shenyang University of Technology
Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology | Year: 2012

The numerical simulation for the flow field of atomized gas in two typical atomizing structures, namely limited and unlimited structures, was performed. According to the simulation results, the distribution of atomization gas flow field in two structures and the change rule of individual parameter on the axial line were analyzed. In addition, the same and different points of gas behavior in two structures were pointed out through performing the comparison. The results show that the backflow regions can form in two structures, but the morphologies of backflow regions are different. Moreover, the backflow strength in the limited structure is higher, and the decrease in the temperature of backflow region is more obvious. A stagnation point with zero velocity appears below the backflow region, but is not the maximum pressure point in the gas field. The maximum pressure point locates at the region below the stagnation point, and is the convergent point of main flow at the jet-flow center. In the spaying process, the atomized gas flow will move in an oscillation mode, and the oscillation amplitude of the gas flow in the limited structure is bigger. With increasing the spaying distance, the oscillation of the gas flow weakens. Source

Liu D.-M.,Shenyang Research Institute of Foundry | Zhang F.-W.,Shenyang Casting and Forging Industrial Co. | He L.-M.,Dalian Deep Blue Pamp Co.
Zhuzao/Foundry | Year: 2011

The present status of cast iron production and energy consumption were reviewed. Some measurements on energy saving and pollutant reduction were discussed from aspects such as molding material, casting process and tooling design, melting, heat treatment, numerical simulation technology, etc. Some valuable references were provided for cast iron enterprises to realize green casting. Source

Xiao B.-L.,Shougang Institute of Technology | Xu Y.-B.,Northeastern University China | Li Z.-J.,Xinjiang Bayi Iron and Steel Co Ltd | Zhang F.-S.,Shenyang Casting and Forging Industrial Co. | Wang G.-D.,Northeastern University China
Journal of Iron and Steel Research | Year: 2011

The microstructural evolution, phase transformation kinetics and strengthening and toughening mechanism of X70 pipeline steel rolled by process of high temperature large deformation and ultra fast cooling were investigated in comparison with traditional TMCP process. It is showed that comprehensive mechanical properties of the tested steel are improved by means of refining grain, increasing dislocation density and refining precipitation in the process of high temperature large deformation and ultra fast cooling. In addition, ductile-brittle transition temperature firstly decreases and then increases with decreasing of finish cooling temperature. Degenerated pearlite resulting from higher finish cooling temperature and carbide from lower finish cooling temperature weaken toughness of the tested steel and optimal specification parameters are as follows, finish rolling temperature being 930°C, finish cooling temperature 600°C and cooling rate 80°C /s. Source

Xiao B.-L.,Northeastern University China | Xu Y.-B.,Northeastern University China | Zhang F.-S.,Shenyang Casting and Forging Industrial Co. | Hou X.-Y.,Northeastern University China | Wang G.-D.,Northeastern University China
Kang T'ieh/Iron and Steel (Peking) | Year: 2010

The microstructural differences and mechanical properties of the tested steel rolled by ultra fast cooling process and traditional TMCP process were investigated by means of thermal simulation and laboratory hot rolling tests. It is demonstrated that condensate depression and nucleation rate increase with increasing cooling velocity and intracrystalline nucleation is main nucleation form of the new phase. Mechanical properties of the rolled plates in laboratory can exceed X90 grade because of the refining acicular ferrite, the dislocation with high density and the refining precipitation. Otherwise, the value of rolling force of high temperature process is lower than that of traditional TMCP process. Relaxation process makes mechanical properties of the tested plates worse because of grain growth coursing. Source

Jiang S.-P.,Shenyang Casting and Forging Industrial Co.
Zhuzao/Foundry | Year: 2011

The concept of foundry industrial cluster was elaborated in this paper. Present situation of China's foundry industrial cluster was presented, and several proposals were put forward on how to advance the construction and development of the foundry industrial cluster. Source

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