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Zhang B.-Q.,Inner Mongolia University of Science and Technology | Wu H.,Inner Mongolia North Heavy Industries Group Co.
Advanced Materials Research

This paper points out the practical significance of the finite element analysis of kinetics on the structure of simultaneous effect of static load and sinusoidal load, and according to the theory of finite element method, the principles and methods of solving problem were studied, and then in the general finite element software of ANSYS, through a concrete example, the solving process of the problem was achieved. This method could be used to the dynamic analysis on the structures of simultaneous effect of many different frequency sinusoidal load. The applied scope of finite element method must be extended by using this method. © (2012) Trans Tech Publications. Source

Guo L.,Inner Mongolia University of Science and Technology | Guo L.,Baotou Vocational and Technical College | Li J.-C.,Inner Mongolia University of Science and Technology | Jing F.X.,Inner Mongolia North Heavy Industries Group Co.

Aluminum alloy oil pan was complex, the die-casting molding and processing of casting is difficult. Cold insulation and porosity defects were found by trial production of the oil pan. So the mold flow analysis was adopted to determine the defect characteristics and position further. Then the technology was improved. The cold insulation problem was solved by perfecting pouring overflow and exhaust system. The porosities were eliminated by notch on the surface. It showed that technology improvement scheme was reasonable, the die-casting defects were effectively solved and qualified oil pan die casting was produced. Source

Zhou Z.,Inner Mongolia North Heavy Industries Group Co.
Energy Materials 2014, Conference Proceedings

This article takes vertical extrusion forming P92 steel pipe which made in NHIC NORINCO Group as study object, and performs overall performance evaluation for P92 steel pipe of 1000MW ultra supercritical thermal power unit main steam pipe and reheat steam heat section of pipeline in China Huaneng Group Nantong Power Plant. This article makes analysis and research for this batch of P92 steel pipe about chemical composition, mechanical property, non-metal inclusion, microstructure, grain size, macro-etching structure and nondestructive detection. The research results show that the quality of Chinese-made extrusion forming P92 steel pipe reach overall quality level of overseas P92 steel pipe, and also they can meet the service requirements of ultra-supercritical thermal power unit. Source

Qin Z.F.,Shenyang Jianzhu University | Zhao M.,Shenyang Jianzhu University | Zhang L.,Shenyang Jianzhu University | Zhang G.Y.,Inner Mongolia North Heavy Industries Group Co.
Applied Mechanics and Materials

A method of online measurement system of stone slab based on Sobel operator improvement is proposed in the paper in order to improve accuracy and productivity of stone slab measurement. Through adding Sobel operator model, they are combined with mathematical morphology method to improve the accuracy of boundary extraction of irregular stone slab and by establishing camera calibration theory formula a relation between world coordinate and image coordinate is set up. The result show that the method can implement online measurement of stone slab and the accuracy of this system can satisfy requirements of stone production industry. © (2014) Trans Tech Publications, Switzerland. Source

Peng Z.,Wuhan University | Cai L.,Wuhan University | Peng F.,Dongfang Boiler Group Co. | Hu Y.,Inner Mongolia North Heavy Industries Group Co. | Chen F.,Wuhan Iron And Steel Company
Jinshu Xuebao/ Acta Metallurgica Sinica

In the present study, the multi-segment feature of stress vs rupture-time plot and the corresponding quatitative change of phase parameters of M23C6 and Laves in each segment were investigated for P92 steel samples subjected to 625°Ccreep-rupture tests. The results indicate that the stress vs rupture-time plot obtained from the test results can be divided into two segments (higher stress level and shorter rupture time segment: 180-150 MPa/30-454 h, and lower stress level and longer rupture time segment: 140-110 MPa/2881-10122 h) respectively, and the microstructure evolution is closely related to the feature of each segment. In the higher stress level and shorter rupture time segment the M23C6 particles are coarsened, while in the lower stress level and longer rupture time segment both M23C6 and Laves phases are coarsened, but the latter is predominantly. The average composition, the amount and the elemental partitioning of each alloy phase called phase parameters can be deter- mined by a multiphase separation method developed. © Copyright. Source

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