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| Development of Metal Charpy V-notch Standard Specimen |
| CHEN Long,ZHANG Bao-zhu,HAN Chao,LUO Xin,PENG Tie-jun |
| Beijing Institute of Metrology, Beijing 100029, China |
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Abstract The principle of development of metal Charpy V-notch standard specimen is described.Low energy grade and medium energy grade are produced from material of 40CrNiMo and tested using national benchmark impact tester.The results show that for low energy grade specimen, the average impact value is 24.836 J with the standard deviation is 1.4 J and stability during half year is 0.7%. For medium energy grade specimen, the average impact value is 97.514 J with the standard deviation is 3.0% and stability during half year is 0.8%.Both meet the requirements of national standard GB/T 18658-2002 and realize the transfer of impact energy reference value?Further the effects of process of development, microstructure and phase structure on impact energy value are analyzed.
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［1］McCowan C N, Pauwels J, Revise G, et al. International comparison of impact verification programs［J］.ASTM Special Technical Publication,2000, 1380: 73-89.
［2］Galban G, Le Muet I, Mougin D, et al. Presentation of the French supply of Charpy V reference test pieces［J］.ASTM Special Technical Publication, 1995,1248: 195-195.
［3］国家质量监督检验检疫总局. GB/T 18658-2002 摆锤式冲击试验机检验用夏比缺口标准试样［S］．
［4］ISO 148-3: 1998 Metallic materials-Charpy pendulum impact test-Part 3: Preparation and characterization of Charpy V reference test pieces for verification of test machines［S］.
［5］郜俊坤．影响夏比冲击试验结果的主要因素［J］．金属加工,2008,（17）:70-71. |
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2013, Vol. 34 
