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Journal of Materials Science & Technology 2006年第6期22卷 860-864页

作者： Cheng LUE Liwen ZHANG Qing＇an TAI Quying ZHENG Zhaokun WANG The State Key Laboratory for Materials Modification by Later Ion and Electron Beams Dalian 116024 China School of Materials Science and engineering Dalian University of Technology Dalian 116024 China Shenyang Liming Aero-engine group Corporation Shenyang 110043 China

Thermal, mechanical and microstructural phenomena are involved in the process of steel quenching. Based on the coupled metallo-thermo-mechanics theory, a calculation model has been developed in this study to simulate the quenching process of a gas turbine compressor disk by finite element method. The thermal physical and mechanical properties were treated as a functions of temperature. Moreover, a series of subroutines were developed on the MARC software platform. Consequently, simulated results on temperature, internal stress and distortion during the quenching were illustrated. With the aid of the simulated results, an optimum quenching scheme was proposed. The quenching process simulated in this study appears to be a promising tool in design of heat-treatment processing parameters for gas turbine compressor disks.

关键词： Quenching stress Distortion Finite element method Metallo-thermo-mechanics

Evolution of Grain Selection in Spiral Selector during Directional Solidification of Nickel-base Superalloys

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Journal of Materials Science & Technology 2011年第2期27卷 118-126页

作者： Xiangbin Meng Jinguo Li Tao Jin Xiaofeng Sun Changbo Sun Zhuangqi Hu Institute of Metal Research Chinese Academy of SciencesShenyang 00China Graduate School of Chinese Academy of Sciences Beijing 000China Shenyang Liming Aero-engine(group) Corporation Ltd. Aviation Industry Corporation of China(AVIC)Shenyang 110043China

The process of grain selection in the spiral selector was investigated by both a ProCAST simulation based on a cellular automaton finite element（CAFE） model and experimental *** results show that the height of starter block,the spiral diameter and initial angle play an important role in grain *** dimension of selector should be maintained in a stable range to optimize the grain orientation and select a single crystal efficiently.A selector which can efficiently select a single crystal had been successfully *** orientation fluctuation in the spiral part was also studied by means of the variation of thermal condition.

关键词： Ni-base single crystal superalloys Grain selection Directional solidification

Degradation of EB-PVD thermal barrier coatings caused by CMAS deposits

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Progress in Natural Science:Materials International 2012年第5期22卷 461-467页

作者： Hui Peng a,Lu Wang a,b,Lei Guo a,Wenhui Miao a,Hongbo Guo a,Shengkai Gong a a School of Materials Science and engineering,Beihang University,No.37,Xueyuan Road,Beijing 100191,China b AVIC Shenyang Liming Aero-engine group Corporation Ltd.,Shenyang 110043,China [a] School of Materials Science and engineering Beihang University No.37 Xueyuan Road Beijing 100191 China [b] AVIC Shenyang Liming Aero-engine group Corporation Ltd. Shenyang 110043 China

In aero-turbine engines,thermal barrier coatings(TBCs) must be capable to withstand harsh environments,such as high-temperature oxidation and ***,a new failure mode of TBCs caused by calcium-magnesium-alumina-silicate(CMAS) glass has attracted increasing *** this paper,yttria stabilized zirconia(YSZ) TBCs produced by electron beam physical vapor deposition(EB-PVD) were exposed to CMAS deposits at 1250℃.The microstructure evolution and failure mechanism of the coatings were *** has been shown that CMAS glass penetrated into the YSZ ceramic layer along the inter-columnar gaps and interacted with *** a result,an interaction zone of about 20μm thickness,which was the mixture of CMAS and YSZ with equiaxial structure,was formed in the YSZ surface layer after 4h heat-treatment at 1250℃.Meanwhile,yttria in YSZ layer as a stabilizer was dissolved in CMAS glass and caused accelerated monoclinic phase *** 8h heat-treatment,degradation of YSZ TBC occurred by delamination cracking of YSZ layer,which is quite different from the traditional failure caused by interfacial cracking at the YSZ/metallic bond *** models have been built to describe the failure mechanism of EB-PVD TBCs attacked by CMAS deposits.

关键词： Thermal barrier coatings(TBCs) Electron beam-physical vapor deposition(EBPVD) Calcium-magnesium-alumina-silicate(CMAS) Failure mechanism

Research and Application of Automatic Compensation Technology for Grinding Wheel in the Process of Regrinding

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Research and Application of Automatic Compensation Technolog...

Diesel engine Cylinder Deactivation Experimental Research on Asymmetric Exhaust System

第25届中国控制与决策会议

作者： XIA Xiaojun BAI Song LIU Fei WANG Hongjuan DAI Junlan Shenyang Institute of Computing Technology Co. Ltd. Chinese Academy of Sciences Avic Shenyang Liming Aero-engine(group)Corporation LTD.

ISBN: (纸本)9781467355339

In this paper, 312DK wriggle grinding machine is used as a platform. First, the paper introduces grinding wheel continuous dressing technology during the process of regrinding. And then, it focuses on how to solve the problems relative to automatic compensation during this process. Finally, by practical application of dressing technology for the grinding wheel, we find it works quite well. Taking the process of complex blade machining as an example, the paper mentions the work flow of machining blade which is guided by automatic compensation technology in the 312DK renovation project. The results of production practice show that surface roughness of the work piece can meet technical index, manmade mistakes are reduced, labor is saved and processing efficiency is improved greatly after using automatic compensation technology.

关键词： Grinding Wheel Continuous Dressing Automatic Compensation 312DK Grinding Machine

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Diesel Engine Cylinder Deactivation Experimental Research on...

Surface hardening of titanium alloys by oxygen-diffusion-permeation

2018中国汽车工程学会年会

作者： ZHOU Peng ZHANG Jianrui ZHANG Zhengxing HAO Baoyu LU Yun engine Department FAW Group Co.

The exhaust temperature could be increased to heat DOC and promote DPF regeneration by part of cylinder deactivation in low load *** the article,with asymmetric exhaust system and EGR valve,cylinder deactivation can be *** advantages and disadvantages of diesel engine cylinder deactivation are analyzed by experimental and modeling *** the keys factors are *** test engine,cylinder deactivation can raise the exhaust temperature by 160 *** the fuel consumption drops by 3%.In theoretical extreme situation,the air flow ratio of half deactivated cylinder and normal condition is located from 1.29 to1.34,which is influenced by booster efficiency in greatest *** fuel consumption and NO emission increase in some conditions for lower air fuel ratio and not optimized injection parameters,further calibration and booster efficiency promotion are helpful.

关键词： diesel engine cylinder deactivation asymmetric exhaust system exhaust temperature increase key factors

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中国有色金属学会会刊：英文版 2003年第1期13卷 73-77页

作者：马红岩王茂才张松辛公春魏政 State Key Laboratory for Corrosion and Protection of Metals Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China School of Materials Science and engineering Shenyang Polytechnic University Shenyang 110023 China Shenyang Liming Aero-engine group Corporation Shenyang 110043 China

The surface oxygen-diffusion-permeation behaviors of Ti based alloys were investigated. MEF4A optical microscopy and HMV-2000 micro-hardness tester were employed to characterize the microstructure and micro-hardness of the oxygen-permeated alloys. The results show that the micro-hardness of Ti based alloys are sharply enhanced by the permeation of oxygen. The microstructure and micro-hardness of oxygen-permeated layer are strongly related to the oxygen-diffusion-permeation techniques. The solid solution of oxygen in α phase can improve the transformation temperature from α phase to β phase and enlarge the region of α phase so as to improve the micro-hardness of surface layer. Therefore, surface oxygen-diffusion-permeation would be a feasible method to reinforce Ti based alloys based on the solid solution of oxygen in α-Ti. At last, a diffusion-solution model was put forward.

关键词：钛基合金表面强化氧扩散渗透

Bolt insertion damage and mechanical behaviors investigation of CFRP/CFRP interference fit bolted joints

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Chinese Journal of Aeronautics 2022年第9期35卷 354-365页

作者： Yangjie ZUO Ting YUE Ruisong JIANG Zengqiang CAO Liu YANG School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China Xi’an Space engine Co.Ltd Xi'an 710100China School of Mechanical engineering Northwestern Polytechnical UniversityXi'an 710072China Xi’an ASN Technology group Co.Ltd Xi'an 710072China

Interference fit has advantages in improving fatigue behaviors of composite bolted joints,however, interference fit bolt insertion tends to cause damages in laminates weakening joint mechanical properties. Therefore, an experimental study was conducted to investigate bolt insertion damages of Carbon Fiber Reinforced Polymer(CFRP)/CFRP interference fit bolted *** behaviors of joints were also evaluated experimentally under both quasi-static loads and cyclic loads. Scanning Electron Microscope(SEM) and high-resolution X-ray micro-CT scan were used to examine micro damages in laminates. Damage and failure behaviors of joints were characterized. The results demonstrated that the hole entrance in upper laminate and the laminate boundary near the hole wall were the most critical regions for damages during bolt insertions. However, the influence of those damages on quasi-static failure loads and fatigue failure modes of joints was minimal. Delamination and matrix cracking occurred first in laminates following fiber and matrix fracture in quasi-static tensile tests. Interference fit could improve the fatigue resistance of the laminate hole, however, the bolt seemed to suffer a more critical local fatigue loading *** paper can contribute to composite structure designs, especially in understanding damage and failure behaviors of composite bolted joints.

关键词： Bolted joints Composite Damage Failure Fatigue life Interference fit

Double oxide film defects in Ni-based super-alloy castings

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China Foundry 2008年第1期5卷 16-19页

作者： Huang Aihua Cui Shusen Lou Yanchun Shenyang Liming Aero-engine group Corp. Ltd. Shenyang 110043 P. R. China Shenyang Research Institute of Foundry Shenyang 110022 P. R. China

A new class of defects has been recently discovered, which are regarded as double oxide film defects. In this study, a number of Ni-based vacuum-cast test bars were investigated. The fractures in the broken test bars were observed by Scanning Electron Microscopy （SEM）. Energy Dispersive Spectroscopy （EDS）, as well as Wavelength Dispersive Spectroscopy （WDS） were used to characterize the chemical elements of the fracture＇s surface. Observation by SEM revealed the presence of inclusions identified as films that appeared to have initiated the growth of carbides. This study has added to the evidence that oxide film defects do exist in Ni-based super-alloy in certain vacuum casting conditions. It provides a reference for researchers＇ further study on the defects, and provides a possible direction for researchers to improve casting technology so as to remove these defects.

关键词： double oxide film vacuum casting Ni-based super-alloy

Study of Start-stop Technology on a GDI engine

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Study of Start-stop Technology on a GDI Engine

Corundum dissolution in concentrated sodium hydroxide solution

2016中国汽车工程学会年会暨展览会

作者： Li Jin Yu Weifei Zhou Peng Zhang Jianrui Chen Tao Sun Pengyuan Li Hua FAW group Co. Ltd.R&D Center Engine Department FAW group Co. Ltd.R&D Center Automotive Electronics Department

ISBN: (纸本)9789811035272;9789811035265

This paper has developeda start- stop control system on a GDI engine,studied effectson the rate of ignition for expansion cylinder and the start- stop performance without a *** experimental results showed a total rate of a successful ignition of the expansion cylinder beyond 70%when the lambda value ranges from 0.6 to *** fuel injection could improve the rate of ignition with the case of single injection compared,the rate of ignition can be increased by averaged 4% for two times fuel injection,a fourtimes fuel injection can increase the rate of ignition by averaged 5%.When the exhaust valve opening timing was retarded to 160° CA ATDC increased success rate of engine *** will be 0.62 s for engine start by a start- stop starter,however 0.39 s by direct injection startstop.

关键词： GDI engine expansion cylinder lambda fuel injection times

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China Foundry 2016年第6期13卷 422-426页

作者： Yu-sheng Wu Hong-liang Li Feng-ling Shi xiao-fu Liu Gui-qao Su Yan-ping Qu School of Materials Science and engineering Shenyang University of Technology Shenyang 110870 China Shenyang Research Institute of Foundry Shenyang 110022 China Shenyang Liming Aero engine (group) Co. Ltd. Shenyang 110043 China

The corundum(α-alumina) core has been considered as a suitable candidate for investment casting of hollow, high pressure turbine engine airfoils due to its excellent properties. However, the efficiency of removing alumina cores in concentrated caustic solution cannot meet the needs of industrial production. In this paper, the effects of temperature and initial solution concentration on dissolution of α-alumina were studied by the classical weight-loss method. The fractal kinetic model was developed in order to describe α-alumina dissolution, assuming that the nonporous particles shrank during reaction process. The results show that the dissolution rate increases with increasing reaction temperature and initial solution concentration. Especially, the initial solution concentration has a significant influence on α-alumina dissolution rate at a higher reaction temperature. The activation energies decrease with increasing initial solution concentration, and the chemical reaction is the rate-controlling step.

关键词： kinetics corundum sodium hydroxide solution dissolution core