Qian X.L.,Jilin University |
Liu Y.,Northern Heavy Industries Group Co. |
Guo R.,Inner Mongolia North Heavy Industries Group Co. |
Zhang Y.Q.,Jilin University |
Wang G.Q.,Jilin University
Applied Mechanics and Materials | Year: 2014
For large-radius bending metal sheets with severe springback, an automatic compensation program based on APDL language was developed to achieve the ideal die geometry. To raise compensation efficiency, the range of the ideal compensation factor based on one-step springback analysis was deduced, and tests prove that more iterations will be needed if compensation factor was beyond the range, and proper selection of compensation factor among the range can be conducive to high compensation efficiency. © (2014) Trans Tech Publications, Switzerland.
Su Y.,Inner Mongolia North Heavy Industries Group Co. |
Yun X.-F.,Inner Mongolia North Heavy Industries Group Co. |
Hao D.-Y.,Inner Mongolia North Heavy Industries Group Co.
Zhuzao/Foundry | Year: 2014
The foundry process of producing ZchSnSbl 1-6 large tin and antimony-based bearing alloy duplex metal castings which is based on upright break pouring and pneumatic compaction combination was introduced in this paper. The microstructure analysis of composite material interface of duplex metal shows that the binding capacity of duplex metal is good. Besides, after machining, the cross-section structure is compact, the surface is bright and clean, antimony-tin, copper-tin and other hard crystal in general also tend to be more reasonable distribution without pores and falls off phenomenon. For these good qualities, it has good adaptability and resistance to bite in the large mining machine assembly. After the assessment in the process of operation, it has good embedded hidden, long service life and good corrosion resistance.
Zhou Z.,Inner Mongolia North Heavy Industries Group Corporation Ltd.
Energy Materials 2014, Conference Proceedings | Year: 2014
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.
Zhang B.-Q.,Inner Mongolia University of Science and Technology |
Wu H.,Inner Mongolia North Heavy Industries Group Corporation Ltd.
Advanced Materials Research | Year: 2012
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.
Pan X.,Nanjing University of Science and Technology |
Song Y.,Inner Mongolia North Heavy Industries Group Co. |
Tan L.,Nanjing University of Science and Technology
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2016
Hydraulic resistance coefficient k1 reflecting mainstream channel structure's characteristic is a key parameter in artillery recoil mechanism design. It can be initialized with tests when channel structures are similar, otherwise it may be different completely. Here, a cylinder wall groove recoil mechanism was studied. For obtaining the reasonable range of k1 in theoretic design, the influencing parameters were studied. Based on the mainstream channel structure analysis and reasonable simplification, the piston rod was fixed, the recoil velocity of the recoil rod V was simulated with inlet velocity V' and the free outlet was set, the equivalent flow field model was built and simulated in Fluent. Under the certain condition of inlet velocity V' and the channel cross-section area ax, the piston force was calculated. And then, the coefficient k1 was deduced with Bernoulli equation. The presented method was validated with a mature recoil mechanism. According to this method, the influences of V and ax on k1 were studied. It was shown that the coefficient k1 increases within a range gradually with decrease in V and ax during recoil; under conditions of the recoil mechanism's parameters here, and using the comparison between the simulated recoil force and the tested one, the reasonable range of k1 is 2.4~2.7. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.
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 Company Ltd
Applied Mechanics and Materials | Year: 2014
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.
Peng Z.,Wuhan University |
Cai L.,Wuhan University |
Peng F.,Dong Fang Boiler Group Corporation Ltd |
Hu Y.,Inner Mongolia North Heavy Industries Group Corporation Ltd |
Chen F.,Wuhan Iron And Steel Company
Jinshu Xuebao/ Acta Metallurgica Sinica | Year: 2010
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.
Wang Y.,Inner Mongolia North Heavy Industries Group Co. |
Li N.,Inner Mongolia North Heavy Industries Group Co. |
Yao S.,Inner Mongolia North Heavy Industries Group Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2015
Microstructure and mechanical properties of 45 steel friction welded joint before and after postweld heat treatment were analyzed and tested. The results show that the grain of the welded joint becomes finer and more uniform and as consistent with the base metal compared with the welded joint before postweld heat treatment. The comprehensive mechanical properties of the welded joint are improved obviously, of which the yield strength and the tensile strength increases by 16% and 23% respectively. The impact absorbing energy increases by 4 times, and the elongation increases by 40%. ©, 2015, Chinese Mechanical Engineering Society of Heat Treatment. All right reserved.
Zhang X.,Nanjing University of Science and Technology |
Gu J.,Nanjing University of Science and Technology |
Wang L.,Nanjing University of Science and Technology |
Zhang X.,Inner Mongolia North Heavy Industries Group Corporation Ltd.
Applied Mechanics and Materials | Year: 2012
The Pulse power source (PPS) control system works in the environment of strong electromagnetic interference, to ensure the system's stability and reliability in the conditions of the multiple PPS modules' working synchronously in timing sequence the CAN bus driver design and optical communication interface design are adopted. The overall design of the PPS control system is proposed after analyzing the principle of PPS. The circuit of data collection of high voltage and high current is designed. The actual experiment proved that this system has high resistance to strong electromagnetic interference and it can work stably and reliably.
Yin M.,Inner Mongolia University of Science and Technology |
Ma Y.X.,Inner Mongolia University of Science and Technology |
Bai L.J.,Inner Mongolia North Heavy Industries Group CO.
Advanced Materials Research | Year: 2014
Through the analysis of Permanent Magnet Synchronous Motor (PMSM) servo system, this paper is aimed to deduce the transfer function model of position output caused by the disturbance input, using the Matlab software for simulation calculation, and to analyze the change of the Bode diagram of the disturbance model when the control system parameter value changes. In addition, based on the analysis, the paper will identify the influence law of the external disturbance at different frequencies on the system servo stiffness. The simulation and analysis will show that adjusting the certain control system parameters can improve the system servo stiffness at different frequencies of the external disturbance. © (2014) Trans Tech Publications, Switzerland.