金属热处理 ›› 2021, Vol. 46 ›› Issue (3): 229-233.DOI: 10.13251/j.issn.0254-6051.2021.03.044

• 测试与分析 • 上一篇    下一篇

晶粒度测定的实验室间比对分析

毕革平1, 陈金哲2, 谭文华1, 高宇情3, 王眉眉4, 陆洪涛5   

  1. 1.国家刀剪及日用金属工具质量监督检测中心, 广东 阳江 529539;
    2.中国合格评定国家认可委员会, 北京 100062;
    3.河冶科技股份有限公司, 河北 石家庄 050000;
    4.中铝材料应用研究院有限公司, 北京 102209;
    5.锦州万友机械部件有限公司, 辽宁 锦州 121007
  • 收稿日期:2020-10-25 出版日期:2021-03-25 发布日期:2021-05-08
  • 作者简介:毕革平(1967—),男,教授级高级工程师,硕士,主要研究方向为认证认可、标准化、刀剪产品质量监督与分析、金属材料失效分析、金属材料质量管理与质量保证,E-mail:bigeping@sina.com

Interlaboratory comparison analysis of grain size determined results

Bi Geping1, Chen Jinzhe2, Tan Wenhua1, Gao Yuqing3, Wang Meimei4, Lu Hongtao5   

  1. 1. China National Quality Supervision and Inspection Center for Knife, Scissors and Domestic Metal Tool, Yangjiang Guangdong 529539, China;
    2. China National Accreditation Service for Conformity Assessment, Beijing 100062, China;
    3. Heye Special Steel Co., Ltd., Shijiazhuang Hebei 050000, China;
    4. Chinalco Materials Application Research Institute Co., Ltd., Beijing 102209, China;
    5. Jinzhou Wanyou Mechanical Parts Co., Ltd., Jinzhou Liaoning 121007, China
  • Received:2020-10-25 Online:2021-03-25 Published:2021-05-08

摘要: 邀请中国合格评定国家认可委员会(CNAS)认可的3个实验室对同一铝合金(AlSi1)样品的14张完全相同的晶粒度图片依据ASTM E112标准进行晶粒度级别指数G的定量测定,并对结果进行了评价。评价结果表明:截点数、晶粒个数的统计计数是G测定结果的主要参数,是G测定结果有效性质量控制的关键点。3个实验室截点数计数极差为3~11个,相对标准偏差2.5%~10.1%,截点法测定G的极差为0.09~0.53。3个实验室晶粒个数计数极差为4.0~16.5个,相对标准偏差2.9%~15.7%,面积法测定G的极差为0.06~0.36。结果同时表明,实验室间比对活动,不能只关注最终结果,还应关注实验室的原始观察结果、中间结果、最终结果的综合评价,以获得改进机会,控制检测风险。

关键词: 晶粒度, ASTM E112, 实验室间比对, 铝合金(AlSi1)

Abstract: Three CNAS-accredited laboratories were invited to determine the grain size G by using the ASTM E112 standard for 14 identical grain size pictures that were taken on the same aluminum alloy (AlSi1) sample, and the results were quantitatively evaluated. The results from three laboratories show that the statistical counts of intersections or grains are the main parameters for determining G and it is the key point of quality control of the effectiveness of determining G. By using the Intercept Procedure, the range of the intersection counts is 3 to 11, the relative standard deviation is 2.5% to 10.1%, and the range of G is 0.09 to 0.53. While by the Planimetric Procedure, the range of grain counts is 4.0 to 16.5, the relative standard deviation is 2.9% to 15.7%, and the range of G is 0.06 to 0.36. The results also show that laboratory - to - laboratory comparison activities should not focus only on the final results, but also on the comprehensive evaluation of the original observation results, intermediate results, and final results, so as to obtain opportunities for improvement and control the testing risk.

Key words: grain size, ASTM E112, interlaboratory comparison, aluminum alloy (AlSi1)

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