qi le hua


The basic information

qi le hua

School of Mechanical Engineering




Work Experience

1998 to Present: Title: Professor

Affiliation: School of Mechatronical Engineering, Northwestern Polytechnical University

Work address: 127 Youyi West Road, Xi’an, China, 710072

1993 to1998: Title: Associate professor

Affilation: School of Mechatronical Engineering, Northwestern Polytechnical University

1985 to 1993: Title: First as an , then an instructor

Affiliation: Department of Material Science and Engineering, Luoyang Institute of Technology

1982 to 1985: Title: Assistant Engineer

Affiliation: Suzhou factory of nail clippers

Education Experience

Mar.2000 to Oct.2004: PhD, Systematical Engineering, Northwestern Polytechnical University, China 

Sep.1990 to Mar.1993: Master Degree of Plasticity Forming, Harbin Institute of Technology, China 

Fab.1978 to Jan.1982: Bachelor Degree of Plasticity Forming, Department of material, Luoyang Institute of Technology, China 

Education And Teaching

Teaching Courses

(1) Fundamentals of Engineering Material and Mechanical Manufacturing Technology for Undergraduate Students;

(2) Hydraulic transmission and Control of Machine Tool for Undergraduate Students;

(3) Fuzzy Theory and Neural Networks—Basis and Application for PhD. Students;

(4) Principle of Artificial Neural Networks and Its Application on the Mechanical Design for Graduate Students;

(5) The Foundation of Near-Net Forming and Its New Technologies for Graduate Students.  

Awards Information

(1) The title of national model teacher in 2014.

2012. (on rank 1)

in 2009.(on rank 4)

(4) The prize of famous teacher of Shaanxi province in 2008.

(5) The 100 excellent Ph.D. dissertations of China in 2007.

(6) The second-class prize for the Excellent Teaching Achievement of Shaanxi province in 2007. (on rank 1)

(7) The title of March 8th Red-Banner Pace-Setter in China in 2008.

(8) The first-class prize for the Science and Technology Progress of Shaanxi province in 2006.(on rank 1)

Excellent Teacher in Teaching of Shaanxi province in 2001.

(10) The third-class prize for the Science and Technology Advancement Progress of the China Aviation Industry Corporation in 1999.(on rank 1)

(11) The Baosteel Excellent Teachers Award of China in 1997. 

Scientific Research

(1) Accumulated material forming with spraying micro-droplet. The research focuses on aluminum droplet formation, microstructure and properties, process control, computer simulation and optimization, etc.

(2) Liquid metal extrusion technology for fabricating tube and bar products of Al alloy and metal matrix composites. Our research covers the preparation of perform, infiltration processing, reinforcing mechanism, microstructure and properties, process optimization and simulation, etc. The Al2O3 short fiber reinforced aluminum matrix composites have been formed successfully.

(3) Semi-solid extrusion technology for metal matrix composites. The metal matrix composites are fabricated via the combination of infiltration and semi-solid extrusion in our laboratory. The magnesium matrix composites are under investigation.

(4) Computer simulation and control on the CVI process and microstructure of carbon-carbon composites. 

Academic Achievements

The total paper is about 210. from 2010, about 64 )

[1] Qi Le-hua, Zhong Song-yiLuo JunThree-dimensional printing technology based on uniform metal droplet ejectingScience China(Information Sciences)201545(2):212-223

[2] Homogenization of transverse elastic properties of Cf/Mg composites at an elevated temperature and containing a small fraction of liquid phase, Composite Science and Technology, 2015,117:234-243

[3] Qi Le-hua,  Ma Yu-qin, Zhou Ji-ming, Hou Xiang-hui, Li He-jun, Effect  of  fiber orientation on mechanical properties of 2D-Cf/Al composites by liquid-solid extrusion following vacuum infiltration technique Materials Science and Engineering A,2015 

[4] Song-yi Zhong, Le-hua Qi, , Jun Luo, et al, Effect of process parameters on copper droplet ejecting by pneumaticdrop-on-demand technology, Journal of Materials Processing Technology 214 (2014) 3089–3097

[7] ; Guan, Jun-taoEffects of the fiber orientation and fiber aspect ratio on the tensile strength of C-sf/Mg compositesComputational Materials Science, 2014,89:6-11

[12]Chang Zhi-yuanQi Le-hua, Guan Jun-taoZhou Ji-mingMa Yu-qinDesign of forming device for complex Cf /Mg composite parts and experimental research, Materials Science & Technology, 2014,22(1): 36-41

[13]CHEN, Fei-fei; QI, Le-hua; ZHOU, Ji-ming; GUAN, Jun-tao; XU, Yi-ren; Design and Experiment Study of Micro-extrusion Forming System Based on Piezoelectric Actuator, Journal of Materials Engineering, 2014, 3: 50-54

[14]Zhou J M, Qi L H, Numerical simulation of liquid-solid extrusion process based on the mechanical model coupled with solidification, Advances in Mechanical Engineering 20131-9

[15]Zuo Han-song, Li He-jun, Qi Le-hua, Chao Yan-pu, Wang Peng-yun, Formation Mechanism of Defects in Aluminum Alloy during Micro-droplet Deposition, , 2013,42(8):1596-1600 (in Chinese)

[16] Qin Tao, Qi Le-hua, Song Yong-shan, Zhang Shou-yang, LI He-jun, Pore Fractal Characterization and Calculation of Flexural Strength of Carbon/Carbon Composites, Journal of materials. 2013, 27(3):140-144 (in Chinese)

[17] Tian Wen-long, Qi Le-hua, Zhou Ji-ming, Huo Jin-xing, Yang Fang, Establishment and Application of a Csf/Mg Composite Periodic Volume Cell Model on the Basis of the RSA Algorithm, Rare Metal Materials and Engineering ,2013,42(8): 1601-1605 (in Chinese)

[18]Tang Yong, Qi Le-hua, Luo Jun, Tao Yuan, Yang Fang, Designing and Implementing an Electromagnetic Actuated Drop-on-Demand(DOD) Droplet Generator, Mechanical Science and Technology for Aerospace Engineering, 2013, 7: 5.

[19]Lehua Qi, Juntao Guan, Jian Liu, Jiming Zhou, Xinliang Wei, Wear behaviors of Cf/Mg composites fabricated by extrusion directly following vacuum pressure infiltration technique, Wear, 307(2013): 127-133

[20]Chao Y P, Qi, LH, Zuo H S, et al,  Remelting and bonding of deposited aluminum alloy droplets under different droplet and substrate temperatures in metal droplet deposition manufacture, International Journal of Machine Tools & Manufacture, 2013, 69:38-47

[21]Yu-qin MA, Le-hua QI, Wu-qiang ZHENG, Ji-ming ZHOU, Lu-yan JU. Effect of specific pressure on fabrication of 2D-Cf/Al composite by vacuum and pressure infiltration [J], Transactions of Nonferrous Metals Society of China (English Edition), 2013, 23:1915-1921

[22]Chao Yan-pu, Qi Le-hua, Zhong Song-yi, Luo Jun, Yang Fang. Numerical simulation for temperature field of micro-droplet deposition manufacture based on element birth and death technology and experimental study[J], Rare Metal Materials and Engineering, 2013, 42(2): 282-287(in Chinese)

[23]Sun Zhen-feng, Qi Le-hua, Shu Yang. Influence analysis for the controllable growth of carbon nanotubes with CCVD method [J], Applied Mechanics and Materials, 2012, 101-102, 573-576

[24]Zhong Song-yi, Qi Le-hua, Luo Jun, Xiao Yuan. Parameters study on generation of uniform copper droplet by Pneumatic Drop-on-Demand technology [J], Advanced Materials Research, 2012, 430-432,781-784

[25]ShuYang, Qi Le-hua, Sun Zhen-fengLi He-jun. Numerical investigation of size and chirality effects on mechanical properties of graphene nanoribbons[C], 2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale, 3M-NANO 2012-Conference Proceedings, 2012, 88-92

[26]Qi Le-hua, Liu Jian, Guan Jun-tao, et al. Tensile properties and damage behaviors of Csf/Mg composite at elevated temperature and containing a small fraction of liquid [J], Composites Science and Technology, 2012, 72(14): 1774-1780

[27]Li Yixian, Qi Le-hua, Song Yong-shan, Li He-jun, Zhang Wei-hong. Measurement of extinction angle of pyrocarbon by one diagonal quarter intensity principle[J], Acta Aeronautica et Astronautica Sinica, 2012, 33(5): 949-955(in Chinese)

[28] Qi Le-hua, Chao Yan-pu, Luo Jun, et al. A novel selection method of scanning step for fabricating metal components based on micro-droplet deposition manufacture [J], International Journal of Machine Tools and Manufacture, 2012, 56: 50-58

[29] Guan Jun-tao, Qi Le-hua, Liu Jian, Zhou Ji-ming. Effect of extrusion temperature on fabrication of Csf/Mg composite by extrusion directly following vacuum pressure infiltration process[J], Journal of Mechanical Engineering, 2012, 48(14): 25-31(in Chinese)

[30] Chao Yan-pu, Qi Le-hua, Xiao Yuan, et al. Manufacturing of micro thin-walled metal parts by micro-droplet deposition[J],Journal of Materials Processing Technology,2012,212(2): 484-491

[31] Luo Jun, Qi Le-hua, Zhong Song-yi, et al. Printing solder droplets for micro devices packages using pneumatic drop-on-demand (DOD) technique[J],Journal of Materials Processing Technology,2012,212(10): 2066-2073

[32] Luo Jun, Qi Le-hua, Zhou Ji-ming, et al. Modeling and characterization of metal droplets generation by using a pneumatic drop-on-demand generator [J], Journal of Materials Processing Technology, 2012, 212(3): 718-726.

[33] Pan Guang-zhen, Qi Le-hua, Fu Ye-wei, Fei Jie, Zhang Xiang. Wet friction and wear behavior of graghite-filled carbon fabric composites [J], Tribology, 2012, 32(4): 360-366(in Chinese)

[34] Sun, Zhen-feng , Qi, Le-hua, Gong, Qiao-juan,Shu, Yang. The effect of carbon substrates on in-situ synthesis carbon nanotube and carbon nanospheres by CVD process [J], Advanced Materials Research, 2011(335-336): 293-296

[35] Luo Jun , Qi Le-huaXiao YuanZhou Ji-MingChen Fei-Fei. Research on the micro metal droplet printing for MEMS packaging[C], Proceedings-3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, 2011, 3,131-134

[36] He Xin-hai, Qi Le-hua, Wang Jun-bo, et al. Preparation of SnO2/C biomorphic materials by biotemplating from ramie fibres[J],Bulletin of Materials Science, 2011, 34(5): 1157-1162

[37] Zeng Xiang-hui, Qi Le-hua, Huang Hua, et al. Control system development and experimental study on ultrasonic vibration feeding[J], Chinese Journal of Mechanical Engineering (English Edition). 2011, 24(6): 1083-1088

[38] Qi Le-hua, Wang Zhen-jun, Zhou Ji-ming, et al. Constitutive behavior of Csf/AZ91D composites compressed at elevated temperature and containing a small fraction of liquid[J], Composites Science and Technology. 2011, 71(7): 955-961

[39] Wang Zhen-jun, Qi Le-hua, Zhou Ji-ming, et al. A constitutive model for predicting flow stress of Al18B 4O33w/AZ91D composite during hot compression and its validation [J], Computational Materials Science, 2011, 50(8): 2422-2426

[40] Bian Guo-jun, Qi Le-hua,Song, Song Yong-shan, Zhang Wei-hong, Li He-jun. Densification process for thermal gradient CVI fabricating C/C composites based on numerical simulation [J], Acta Materiae Compositae Sinica. 2011, 28(4): 29-33 (in Chinese)

[41] He Xin-hai, Qi Le-hua, Wang Jun-bo, Shen Ming-qian, Su Xiao-lei, Yang Min-ge. Preparation and characterization of SiC porous ceramics from ramie fibers[J], Journal of Functional Materials, 2011, 42(8): 1485-1488 (in Chinese)

[42] Zeng Xiang-hui, Qi Le-hua, Jiang Xiao-shan, Yang Fang. Numeriacal simulation of a metal drop in impinging on substrate[J], Journal of Harbin Institute of Technology, 2011, 43(3): 70-74 (in Chinese)

[43] Li Yang, Qi Le-hua, Luo Jun, Zeng Xiang-hui, Yang Fang. Experimental study on characteristics of molten metal pneumatic drop-on-demand ejection [J], Journal of Xi’an Jiaotong University, 2011, 45(5): 69-73 (in Chinese)

[44] Qi Le-hua, Luo Jun, Zhou Ji-ming, et al. Predication and measurement of deflected trajectory and temperature history of uniform metal droplets in microstructures fabrication[J],International Journal of Advanced Manufacturing Technology,2011, 55(9-12): 997-1006

[45] Xiao Yuan, Qi Le-hua, Zeng Xiang-hui, Chao Yan-pu, Yang Fang. Uniform metal droplet produced by pneumatic generator with controlled spray process and analysis of the droplet deposition accuracy [J], Journal of Mechanical Engineering, 2011, 47(15): 156-160(in Chinese)

[46] Sun Zhen-feng, Qi Le-hua, Shu Yang, et al. Simulation analysis of influence factors for preparation of dispersed cap-open carbon nanotubes using CCVD [J], Journal of Reinforced Plastics and Composites, 2011, 30(9): 763-768

[47] Qi Le-hua, Zeng Xiang-hui, Zhou Ji-ming, et al. Stable micro-feeding of fine powders using a capillary with ultrasonic vibration [J], Powder Technology, 2011, 214(2): 237-242

[48] Luo Jun, Qi Le-hua, Zhou Ji-ming, et al. Study on stable delivery of charged uniform droplets for freeform fabrication of metal parts [J], Science China Technological Sciences, 2011, 54(7): 1833-1840

[49] He Xin-hai, Qi Le-hua, Wang Jun-bo, Yang Min-ge, Shen Ming-qian, Chang Wei. Effect of biological template consolidation on the microstructure and properties of SnO2/C biomorphic materials [J], New Carbon Materials, 2011, 26(5): 375-380(in Chinese)

[50] Zeng Xiang-hui, Qi Le-hua, Xiao Yuan, Wang Peng-fei, Yang Fang. Droplet temperature measurement and calculation during spray process[J], Chinese Journal of Scientific Instrument, 2011, 32(1): 93-98(in Chinese)

[51] Chao Yan-pu , Qi Le-hua,Zeng Xiang-huiLuo Jun,Huang Hua. Experimental research of process parameters in metal droplet deposition manufacturing [J], Advanced Materials Research, 2010, 97-101, 4028-4031

[52] Zhou Ji-ming , Qi Le-huaOuyang HaiboLi He-jun.Mechanical properties of Csf/AZ91D composites fabricated by extrusion forming process directly following the vacuum infiltration[J], Advanced Materials Research,2010,89-91,692-696

[53] Guan Jun-tao, Qi Le-hua, Su Li-zheng, Liu Jian, Experimental study on Csf/AZ91D composite using extrusion following vacuum infiltration method[J],Advanced Materials Research, 2010,97-101,382-385

[54] He Xin-haiQi Le-huaWang Jun-boShen Ming-qian,Fu ChongChang WeiYang Min-ge. The fabrication of Al2O3/C morph-genetic ceramics by biotemplating from ramie fibers [C], 2010 International Conference on Mechanic Automation and Control Engineering MACE2010, 2010, 3484-3487

[55] Xiao Yuan , Qi Le-hua, Chao Yan-pu,Luo JunHuang Hua. Deposition manufacturing of three-dimensional objects by spraying the metal droplets[C], 2010 International Conference on Mechanic Automation and Control Engineering, MACE2010,2010, 3068-3071

[56] Zeng Xiang-Hui, Qi Le-huaHuang HuaJiang Xiao-ShanXiao Yuan. Experimental research of pneumatic drop-on-demand high temperature droplet deposition for rapid prototyping [J], 2010, 419, 405-408

[57] Xiao Yuan, Qi Le-hua, Huang Hua, Zeng Xiang-hui, Yang Fang. Design and implement of pneumatic drop-on-demand generator for metal droplet production [J], Transactions of Beijing Institute of Technology, 2010, 30(7): 780-784(in Chinese)

[58] Le-hua Q, Xiao-shan J, Jun L, et al. Dominant factors of metal jet breakup in micro droplet deposition manufacturing technique[J], Chinese Journal of Aeronautics,2010, 23(4): 495-500

[59] Yang Yi, Qi Le-hua, Zeng Xiang-hui, Luo Jun, Yang Fang. Study of remelting during droplet spray depositing process [J], Journal of Xi’an Jiaotong University, 2010, 44(8): 117-121(in Chinese)

[60] Zhong Jian-hua, Qi Le-hua, Li Miao-ling, Zhao Zhi-long, Li He-jun. Automatic of classification of pyrocarbon texture under polarized light microscope based on artificial neural network[J], Journal of Xi’an Jiaotong University, 2010, 44(7): 46-49119(in Chinese)

[61] Jiang Xiang-shan, Qi Le-hua, Luo Jun, et al. Research on accurate droplet generation for micro-droplet deposition manufacture[J],International Journal of Advanced Manufacturing Technology, 2010, 49(5-8): 535-541

[62] Qi Le-hua, Xu Rui, Su Li-zheng, et al. Dynamic measurement on infiltration process and formation mechanism of infiltration front [J], Transactions of Nonferrous Metals Society of China (English Edition), 2010, 20(6): 980-986

[63] Qi Le-hua, Liu Jian, Guan Jun-tao, et al. Damage prediction for magnesium matrix composites formed by liquid-solid extrusion process based on finite element simulation [J], Transactions of Nonferrous Metals Society of China (English Edition), 2010, 20(9): 1737-1742

[64] Zhou Ji-ming, Qi Le-hua. Treatment of discontinuous interface in liquid-solid forming with extended finite element method[J],Transactions of Nonferrous Metals Society of China (English Edition), 2010, 20(SUPPL. 3): 911-915

(1) Qi Le-hua, Ju Lu-yan, Wei Xin-liang, Ma Yu-qin, Zhou Ji-ming, Fission preheating device and method for infiltration magnesium matrix composite(Number of Chinese patent:ZL201310713686.4)

(2) Luo Jun, Qi Le-hua, Zhong Song-yi, Zhang Dai-cong, Yang Fang, A device and method for three-dimensional printing using metal droplets deposition by controlled(Number of Chinese patent: ZL201310713252.4)

(3) Qi Le-hua, Pan Guang-zhen, Fu Ye-wei, Guo Xue-ping, Song Xioa-dong, Li He-jun,A fixture and method for paper-based friction material testing(Number of Chinese patent: ZL201310303373.1)

(4) Qi Le-hua, Tao Yuan, Yang Fang, Luo Jun, Chao Yan-pu, Zhong Song-yi, Ma Qian, A device and method for generating micro-metal droplets using the micro-metal droplets generator(Number of Chinese patent: ZL201310003717.7)

(5) Qi Le-hua, Luo Jun, Zhong Song-yi, Zhou Ji-ming, Yang Fang, A device and method for spraying high-melting-point metals droplets metal using s(Number of Chinese patent: ZL201110133077.2)

(6) Qi Le-hua, Ma Yu-qin , Liu Jian, Guan Jun-tao, Wei Xin-liang, Li He-jun.A device and method for manufacturing aluminum matrix composite using the liquid infiltration and semi-solid extrusion process(Number of Chinese patent:ZL201210143613.1)

(7) Qi Le-hua, Xu Rui, Zhou Ji-ming, Su L-izheng, Li He-jun.A visual control method and specialized device for the liquid metal infiltration. (Number of Chinese patent: ZL200910023132.5)

(8) Qi Le-hua, Zeng Xiang-hui, Huang Hua, Luo Jun, Chao Yan-pu, Yang Fang.A method for the deposition of nonhomogeneous parts. (Number of Chinese patent: ZL200910021831.6)

(9) Qi Le-hua, Su Li-zheng, Ouyang Hai-bo, Zhou Ji-ming, Wang Zhen-jun.An integrated device and method for manufacturing magnesium matrix composites. (Number of Chinese patent: ZL200810017359.4)

(10) Qi Le-hua, Chen Zhi-bin, Li He-jun, Xu Xin-xing, Tan Xiao-chao, Fei Jie.A gripping device for annular flat sheets. (Number of Chinese patent: ZL200710018476.8)

(11) Qi Le-hua, Chen Zhi-bin, Li He-jun, Fu Ye-wei, Fei Jie, Ren Yuan-chun.A method for automatically paper-making using a pneumatic manipulator. (Number of Chinese patent: ZL200710017235.1)

(12) Qi Le-hua, Luo Jun, Yang Fang, Huang Hua, Jiang Xiao-shan.A manufacturing method for the multi-material micro-parts. (Number of Chinese patent: ZL200610104685.X)

(13) Qi Le-hua, Yang Fang, Huang Hua, Luo Jun, Jiang Xiao-shan. A controllable feeding powder device and method. (Number of Chinese patent: ZL200610104681.1)

(14) Qi Le-hua, Shu De-hua, Luo Jun, Yang Fang, Jiang Xiao-shan.A control device and method for the accurate charge of the metal droplets. (Number of Chinese patent: ZL200610104437.5)

(15) Qi Le-hua, Su Li-zheng, Ouyang Hai-bo, Li Zheng-jia, Yang Fang, Li He-jun.A measurement method for the infiltration characteristics of metal matrix composites manufactured by the vacuum infiltration process. (Number of Chinese patent: ZL200610043107.X)

(16) Qi Le-hua, Yang Fang, Mao Jun, Sun Zhen-feng, Chen Yong, Wang Hua-long.A superplastic extrusion forming device for micro-parts. (Number of Chinese patent: ZL200510022725.1)

(17) Qi Le-hua, Shi Zhong-ke, Zhou Ji-ming, Yang Fang, Li He-jun.An automatic control device for metal matrix composites manufactured by the liquid-solid extrusion process. (Number of Chinese patent: ZL200410073448.2)

(18) Qi Le-hua, Yu Xing-min, Li He-jun, Guo Ling-jun, Shi Zhong-ke, Su Li-zheng. A method and specialized device for manufacturing metal matrix composites extrusions. (Number of Chinese patent: ZL200412273315.5)

(19) Qi Le-hua, Yang Fang, Zhang Ding-hua, Jiang Xiao-shan, Xu Lin-feng.A micro-fabrication method for rapid prototyping inhomogeneous functional parts(Number of Chinese patent: ZL200410026371.3)

Published teaching books and monograph

(1) Qi Le-hua. Engineering material and forming process foundation, Press of Northwest Polytechnical University, Xi’an: March, 2002

(2) Qi Le-huaEngineering material and mechanical manufacturing foundation, Higher education press, Beijing: April, 2006

(3) Li He-jun, Qi Le-hua, Zhou Ji-ming, Technology and application of liquid solid forming under high pressure. National defense industry press, Beijing: January, 2013