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Optimization of Open-cast Mining Procedure Based on RSR Method

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Asian Agricultural Research 2024年第4期16卷 23-26,32页

作者： Qingyou AO Zhongfei LI Shudong LIU Wenjie XIA Lin LIN State Power Investment corporation Inner Mongolia Energy Co. Ltd.Tongliao 029200China Huolinhe North Surface Mine No.3 of Inner Mongolia Power Investment Energy Co. Ltd.Tongliao 029200China Huolinhe South Surface Mine of Inner Mongolia Power Investment Energy Co. Ltd.Tongliao 029200China CCTEG shenyang engineering Company Shenyang 110015China

To explore the optimal evaluation mechanism of open-cast mining procedure,this paper takes the actual operation status of Huolinhe No.1 Open-cast Mine as the research basis,and makes a deep analysis of the four representative mining procedures proposed by this mine.A detailed and comprehensive evaluation system is constructed using rank-sum ratio(RSR)*** system covers 17 key indicators and aims to evaluate the advantages and disadvantages of each scheme in an all-round and multi-angle *** the calculation and analysis by RSR method,the comprehensive evaluation of the four types of mining procedure schemes is carried out,and finally the secondary river improvement project is determined as the optimal mining implementation scheme,and the joint mining scheme of the south and north areas is the alternative *** research results of this paper are objective,clear and definite,can not only reveal the effectiveness and feasibility of RSR method in solving the problem of open-cast mining procedure optimization,but also provide a strong technical support and decision-making basis for the future production development of Huolinhe No.1 Open-cast ***,this study is expected to further promote the scientific and refined process of mining operations.

关键词： Mining procedure Evaluation mechanism Rank-sum ratio (RSR) method Comprehensive evaluation Optimization

Investigation on temperature field of unidirectional carbon fiber/epoxy composites during drilling process

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Journal of Central South University 2019年第10期26卷 2717-2728页

作者： BAO Yong-jie WANG Yi-qi GAO Hang LIU Xue-shu ZHANG Yi-ni engineering Training Center Dalian University of TechnologyDalian 116024China Key Laboratory of Ministry of Education for Precision and Non-Traditional Machining Technology School of Mechanical EngineeringDalian University of TechnologyDalian 116024China School of Automotive engineering Dalian University of TechnologyDalian 116024China shenyang liming aero-engine Group corporation Ltd. Shenyang 110043China

The phenomenon of heat accumulation and transportation in the composite materials is a very typical and critical issue during drilling *** this study,a three-dimensional temperature field prediction model is proposed using finite difference method,based on the partly homogenization hypothesis of material,to predict temperature field in the process of drilling unidirectional carbon fiber/epoxy(C/E)*** to the drilling feed motion,drilling process is divided into four stages to study the temperature distributing *** results show that the temperature distribution predicted by numerical study has a good agreement with the experimental *** temperature increases with increasing the drilling depth,and the burn phenomena is observed due to the heat accumulation,especially at the drill *** to the fiber orientation,an elliptical shape of the temperature field along the direction is found for both numerical and experimental studies of C/E composites drilling process.

关键词： composite drilling finite difference method temperature field thermal analysis

Effect of two-step solid solution on microstructure andδphase precipitation of Inconel 718 alloy

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2199-2207页

作者： Enyu Liu Qingshuang Ma Xintong Li Aoxue Gao Jing Bai liming Yu Qiuzhi Gao Huijun Li School of Materials Science and engineering Northeastern UniversityShenyang 110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China School of Materials Science&engineering Tianjin UniversityTianjin 300354China School of Mechanical Materials and Mechatronic EngineeringUniversity of WollongongWollongongNSW 2522Australia

Inconel 718 is the most popular nickel-based superalloy and is extensively used in aerospace,automotive,and energy indus-tries owing to its extraordinary thermomechanical *** effects of different two-step solid solution treatments on microstructure andδphase precipitation of Inconel 718 alloy were studied,and the transformation mechanism fromγ″metastable phase toδphase was *** precipitates were statistically analyzed by X-ray *** results show that theδphase content firstly increased,and then decreased with the temperature of the second-step solid *** changes in microstructure andδphase were studied by scanning electron microscopy and transmission electron *** intragranularδphase formed in Inconel 718 alloy at the second-[100]_(δ)[011]γ step solid solution temperature of 925℃,and its orientation relationship withγmatrix was determined as//and(010)_(δ)//(111)γ.Furthermore,the Vickers hardness of different heat treatment samples was measured,and the sample treated by second-step solid solution at 1010℃ reached the maximum hardness of HV 446.84.

关键词： Inconel 718 alloy two-step solid solution treatment δphase γ″-δtransformation

Residual Stress Relaxation of Thin‑walled Long Stringer Made of Aluminum Alloy 7050‑T7451 under Transportation Vibration

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Chinese Journal of Mechanical engineering 2020年第3期33卷 150-159页

作者： Yinfei Yang Lu Jin Jixing Du Liang Li Wei Yang Nanjing University of aeronautics and Astronautics Nanjing 210016China shenyang Aircraft corporation Shenyang 110034China.

Thin-walled long stringer made of aluminum alloy 7050-T7451 is prone to deformation during transportation,so a research of residual stress relaxation was launched in this *** transport resonance stress of long stringer was analyzed based on the power spectral density of road transport *** residual stress relaxation experiment of aluminum alloy 7050-T7451 under different equivalent stress levels was designed and carried *** to the amount of residual stress relaxation in the experiment,an analytical model was established with the equivalent stress level *** deflection range of long stringer was evaluated under different damping *** results show that when the equivalent stress exceeds 0.8σ0.2,the residual stress relaxation of the thin-walled samples *** residual stress relaxation increases linearly with the equivalent stress,which is logarithmically related to the loading *** deformation caused by residual stress relaxation of the long stringer is proportional to the square of the length and the bending moment caused by stress rebalance,and inversely proportional to the moment of inertia of the *** the damping ratio decreases from 0.03 to 0.01,the total deflection of the long stringer increases from 0 to above 1.55 mm.

关键词： Aluminum alloy 7050-T7451 Large thin-walled part Transportation process Residual stress Structural deformation

Design and experiments of plasma jet igniter for aeroengine

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Propulsion and Power Research 2013年第3期2卷 188-193页

作者： Yubo Guan Guorui Zhao Xinying Xiao AVIC shenyang engine Design and Research Institute ShenyangLiaoning 110000China

A plasma jet ignition technology was studied for aeroengine *** advantages of compact stnucture and advanced performance of air-cooled plasma jet igniter had been tested and verified in the opening *** plasma jet igniter could produce a continuous plasma jet,stable and reliable *** influence factors of plasma jet ignition aerodynamic and structure were studied in the opening *** plasma jet was closely related to inlet pressure and flow,simultaneously to the igniter nozzle geometry and throat *** on the stable continuous plasma jet,some methods were explored in order to reduce plasma output power,optimize the structure design,and improve the thermal *** plasma jet igniter applied to aeroengine combustor was identified *** combustion chamber with the igniter,altitude ignition performance were experimented for the inlet pressure of plasma ignition from 10 kPa to 50 kPa,the flow of plasma jet not more than 0.20 g/s,and energy output of ignition from 800 W to 1500 *** test results were compared with that of conventional aeroengine high energy ignition *** results show that the plasma jet igniter is better than the conventional one.

关键词： aeroengine Plasma Igniter Jet Ignition

Enhancing the thermoelectric performance of Bi2S3: A promising earth-abundant thermoelectric material

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Frontiers of physics 2019年第1期14卷 111-122页

作者： Ye Chen Dongyang Wang Yuling Zhou Qiantao Pang Jianwei Shao Guangtao Wang Jinfeng Wang Li-Dong Zhao School of Materials Science and engineering Beihang University Beijing 100191 China AVIC SAC Commercial Aircraft Co. Ltd. Shenyang 110034 China Liaoning Tieling Sales Branch Petro China Co. Ltd. Tieling 112000 China shenyang liming Areo-engine Co. Ltd. Shenyang 110043 China College of Physics and Materials Science Henan Normal University Xinxiang 453007 China

Recently, bismuth sulfide (Bi2S3) has attracted much attention in the thermoelectric community owing to its abundance, low cost, and advanced properties. However, its poor electrical transport properties have prevented Bi2S3 devices from realizing high thermoelectric performance. In this work, our motivation is to decrease the large electrical resistivity, which is recognized as the origin of the low ZT value in undoped Bi2S3. We combined melting and spark plasma sintering (SPS) in a continuous fabrication process to produce Bi2S3–xSex (x = 0, 0.09, 0.15, 0.21) and Bi2S2.85–ySe0.15Cly (y = 0.0015, 0.0045, 0.0075, 0.015, 0.03) samples. Our results show that Se alloying at S sites can narrow the band gap and activate intrinsic electron conduction, leading to a high power factor of ~2.0 μW·cm–1·K–2 at room temperature in Bi2S2.85S0.15, about 100 times higher than that of undoped Bi2S3. Moreover, our further introduction of Cl atoms into the S sites resulted in a second-stage optimization of carrier concentration and simultaneously reduced the lattice thermal conductivity, which contributed to a high ZT value of ~0.6 at 723 K for Bi2S2.835Se0.15Cl0.015. Our results indicate that high thermoelectric performance could be realized in Bi2S3 with earth-abundant and low-cost elements.

关键词： thermoelectric Bi2S3 carrier concentration lattice thermal conductivity

Laser cladding of NiCrSiB on Monel 400 to enhance cavitation erosion and corrosion resistance

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Rare Metals 2022年第12期41卷 4257-4265页

作者： Chun-Hua Zhang Chen-Liang Wu Song Zhang Yong-Feng Jia Meng Guan Jun-Zhe Tan Bin Lin School of Materials Science and engineering Shenyang University of TechnologyShenyang 110870China Nuclear Power Pump Industry Co. Ltd.Shenyang Blower Works Group CorporationShenyang 110869China

NiCrSiB modified layer was synthesized on Monel 400 by laser cladding,aiming at improving cavitation erosion and corrosion *** microstructure,chemical composition,phase constituents and microhardness were investigated using scanning electron microscope(SEM),energy-dispersive spectrometer(EDS),X-ray diffractometry(XRD) and microhardness *** cavitation erosion and corrosion behaviors of the modified layer were also evaluated using an ultrasonic vibrator and potentiodynamic polarization measurement,*** results show that by varying the laser fluence,a hard NiCrSiB modified layer with little airholes,cracks or other defects could be *** modified layer is ~1.1 mm in *** microstructure of the modified layer exhibits cellular dendrite,flake-like dendrite and multiple eutectic *** modified layer is mainly composed of γ-Ni solid solution,chromium carbide(Cr_(7)C_(3)and Cr_(23)C_(6)) and Ni_(3)*** microhardness of the modified layer is ~6.8 times that of Monel 400 *** the cavitation erosion and corrosion resistance of the modified layer are *** the cavitation erosion test,the cumulative erosion loss and erosion loss rate of the modified layer are one order of magnitude lower than that of the *** the electrochemical corrosion test,the corrosion potentials of the substrate and the modified layer are *** corrosion current densities of the substrate and the modified layer are 11.12 and 1.95 μA·cm^(-2),*** comparing their corrosion current densities,the corrosion resistance of the modified layer is about 5.7 times that of the substrate.

关键词： NiCrSiB Laser cladding Microstructure Cavitation erosion Corrosion

Interfacial microstructure and mechanical properties of stainless steel clad plate prepared by vacuum hot rolling

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Journal of Iron and Steel Research International 2018年第7期25卷 732-738页

作者： Jun Jiang Hua Ding Zong-an Luo Guang-ming Xie School of Materials and Metallurgy Northeastern University Shenyang 110819 Liaoning China shenyang Aircraft corporation Shenyang 110034 Liaoning China State Key Laboratory of Roiling and Automation Northeastern University Shenyang 110819 Liaoning China

A stainless steel clad plate composed of stainless steel and carbon steel was prepared by vacuum hot rolling process, and its microstructure, especially the bonding interface, was evaluated using an optical microscope, a scanning electron micro- scope and a transmission electron microscope （TEM）. The corresponding mechanical properties were also assessed by means of hardness and shear tests. The results showed a bonding interface formed between stainless steel and carbon steel, which was relatively straight in macroscope but serrated in microscope. Decarburization layer and carbon-enriched layer were distinguished at the side of carbon steel and stainless steel near the interface, respectively, which should be related to diffusion of carbon and alloying elements. The carbon-enriched layer could also be identified as a recombination region, whose microstructure was mainly recognized as martensite by TEM. Consequently, the hardness was the highest at this region. Furthermore, the result of shear test at the bonding interface showed that the shear strength was 395 MPa and the fracture mode was dominated as ductile fracture, indicating the bonding interface with good quality.

关键词： Stainless steel clad plate Vacuum hot rolling Interface microstructure Mechanical property

Theory Analysis and Experiment Investigation of Laser Shock Processing on Titanium Alloy Blade

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稀有金属材料与工程 2011年第S4期40卷 235-239页

作者： Che Zhigang1,Gong Shuili1,Cao Ziwen1,Zou Shikun1,Gao Yu2,Ma He1 1Laboratory of Science and Technology on Power Beam Processes,Beijing aeronautical Manufacturing Technology Research Institute,Bei-jing 100024,China 2shenyang liming aero-engine Group corporation Ltd.,shenyang 110043,China Beijing aeronaut Mfg Technol Res Inst Lab Sci & Technol Power Beam Proc Beijing 100024 Peoples R China shenyang liming aeroengine Grp Corp Ltd Shenyang 110043 Peoples R China

Laser shock processing (LSP) is an effective surface treatment technology to increase the resistance of metallic components to high-cycle fatigue (HCF),stress corrosion cracking (SCC),wear,etc.,through imparting compressive residual stress on the *** requirement for aeroengine blade treatment and the principle of LSP were introduced at the beginning of this *** key theories and technologies for LSP were analyzed,including improving the pressure model and introducing the technique of eliminating wave reflection at the back of blade during *** nanocrystallation of titanium alloy surface was realized for the first time using the method of laser shocking at the same time no impurity particles were *** treating one kind of aeroengine blade using LSP,the technology parameters were *** nature frequency,fatigue life and residual stress were *** results showed the blade performance was improved obviously,which established the theory and experiment base of laser shock processing on blisk.

关键词： laser shock processing pressure model nanocrystallation natural frequency titanium alloy