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    Measurement Conditions and Uncertainty Evaluation of Specific Surface Area of Graphene Powder by Nitrogen Adsorption Method
    HOU Yuan, WU Yiwen, WU Xiaoliang, ZHU Wenguang, ZHANG Bangwen
    2021, 57(7): 1-5. DOI: 10.11973/lhjy-wl202107001
    Abstract PDF
    Influence Factors and Relative Deviation of Conversion of Building Structure Steel Strength by Leeb Hardness
    ZHANG Shuxun, CUI Meng, WANG Ning, WANG Hao, DING Beidou
    2021, 57(7): 6-11. DOI: 10.11973/lhjy-wl202107002
    Abstract PDF
    Uncertainty Evaluation in Measurement of Average Linear Expansion Coefficient of Beryllium Material
    LI Meisui, ZHANG Zifu, ZHANG Jiankang, LÜ Yige, GONG Weiming
    2021, 57(7): 12-14,19. DOI: 10.11973/lhjy-wl202107003
    Abstract PDF
    Cause of Low Impact Toughness on Friction Welding Seam Zone of S135 Drill Pipe
    YANG Xiaofeng, GAO Binqiang, LÜ Haiying
    2021, 57(7): 15-19. DOI: 10.11973/lhjy-wl202107004
    Abstract PDF
    Uncertainty Evaluation of Vickers Hardness Measurement for Resistance Welding Joint of DP780 High Strength Steel
    ZHANG Jie, ZHANG Xiangrui, HE Guoqiang, YIN Xiaohui
    2021, 57(7): 20-24. DOI: 10.11973/lhjy-wl20210705
    Abstract PDF
    Program Segment Design and Test Result of H-beam Tensile Sample Processed by Numerical Control High Speed Sawing Machine
    SONG Xiaoyong, CHENG Yanan
    2021, 57(7): 25-28,34. DOI: 10.11973/lhjy-wl202107006
    Abstract PDF
    Effect of Different Fitting Functions on Evaluation Results of Ductile Brittle Transition Temperature of Gas Turbine Disk
    YANG Jingang
    2021, 57(7): 29-34. DOI: 10.11973/lhjy-wl202107007
    Abstract PDF
    Revision and Interpretation of Determination Method for Bake-Hardening-Index of Steel in GB/T 24174—2009
    TIAN Huiling, XU Weicheng
    2021, 57(7): 35-38,47. DOI: 10.11973/lhjy-wl202107008
    Abstract PDF
    Application and Calibration Compensation of Leeb Hardness Tester in Heat Treatment Field
    XIAO Jian, SUN Pan
    2021, 57(7): 39-42,51. DOI: 10.11973/lhjy-wl202107009
    Abstract PDF
    Cause of Leakage on 316L Stainless Steel Plate Heat Exchanger
    WU Jianhua, LI Pingping, LI Yuxin, WU Te
    2021, 57(7): 43-47. DOI: 10.11973/lhjy-wl202107010
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    Cause of Fracture on Suspension Clamp of a 220 kV Transmission Line
    YANG Yingchun, YU Hongjiang, DAI Keshun
    2021, 57(7): 48-51,56. DOI: 10.11973/lhjy-wl202107011
    Abstract PDF
    Cause of Fracture on High Strength Bolt for Wind Turbine Blade Connection
    TAN Yanxian, HUANG Ke, LUO Shujing
    2021, 57(7): 52-56. DOI: 10.11973/lhjy-wl202107012
    Abstract PDF
    Cause of Fracture on 18CrNiMo7-6A Steel Reducer Output Shaft
    LEI Shumei, ZOU Gaopeng, YIN Shiheng, KUANG Tongchun
    2021, 57(7): 57-60,64. DOI: 10.11973/lhjy-wl202107013
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    Cause of Fracture on EH Oil Pipe of High Pressure Steam Regulating Valve in a Power Plant
    LIU Wensheng
    2021, 57(7): 61-64. DOI: 10.11973/lhjy-wl202107014
    Abstract PDF
    Cause of Fracture on 45 Steel Drive Shaft
    ZHAO Meiling, FENG Feilong, ZHAN Zhong, WU Jing
    2021, 57(7): 65-68. DOI: 10.11973/lhjy-wl202107015
    Abstract PDF
    Causes and Preventive Measures of Grinding Cracks of Carburized and Quenched Gear of Rolling Mill
    XU Hongxiang, ZHANG Heng, GUO Wenyi, LU Jinsheng
    2021, 57(7): 69-72,75. DOI: 10.11973/lhjy-wl202107016
    Abstract PDF
    Correct Identification of Echo Signal of Ultrasonic Testing Caused by Weld Reinforcement
    LAN Dongmei, LI Gongkai, WANG Pantao, ZHANG Zhigang
    2021, 57(7): 73-75,80. DOI: 10.11973/lhjy-wl202107017
    Abstract PDF
    Causes and Improvement Measures of Surface Defects of Hot Rolled Strip in Continuous Casting Rolling Production Line
    LIU Xiangming, ZHU Qimao, WANG Wei, LI Yang
    2021, 57(7): 76-80. DOI: 10.11973/lhjy-wl202107018
    Abstract PDF