GB-T231.3-2002 金属布氏硬度试验 第3部分： 标准硬度块的标定

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1、ICS77.040.10H22中华人民共和国国家标准GB/T231.3-2002代替GB/T6270-1997金属布氏硬度试验第3部分:标准硬度块的标定MetallicBrinellhardnesstest-Part3:Calibrationofhardnessreferenceblocks(ISO6506-3:1999，Metallicmaterials-Brinellhardnesstest-Part3:Calibrationofreferenceblocks，MOD)2002-11-25发布2003-05-01实施中华人民共和国发布国家质量

2、监督检验检疫总局GB/T231.3-2002目次月U舀。。·，····。····。·······。····················································。·，······。···············。····⋯⋯”。。·⋯⋯皿引言··························································································，·····················⋯⋯1V1范围···············

3、·····································，，······‘···················，·······················⋯⋯12规范性引用文件·.......................................................................·····.......·.....⋯⋯13标准块的制造···，，·····，，，，···············，·，，，，，·················，，，，·⋯，.··············，

4、⋯⋯，，，14标准机··‘····················，··························，··，，，··················································⋯⋯25标定方法···················································，，···················································⋯⋯，36压痕数目·······································

5、·································································⋯⋯37硬度均匀度······································································⋯⋯，，.········.·.....······.⋯⋯38标志·一9有效性GB/T231.3-2002前言GB/T231《金属布氏硬度试验》分为如下三个部分:—第1部分:试验方法;—第2部分:硬度计的检验与校准;—第3部分:标准硬度块的标定。本部分为GB/T2

6、31的第3部分。本部分修改采用国际标准ISO6506-3:1999《金属材料布氏硬度试验第3部分:标准块的标定I(英文第一版)。本部分是根据ISO6506-3:1999采用翻译法起草的，在文本结构和技术内容方面与ISO6506-3:1999一致，存在小的差异如下:—用中文惯用的小数点符号“”代替英文采用的小数点符号“，，’;—为与我国相关硬度标准统一，改变了标准名称，合并了其引导要素和主体要素，统称为“金属布氏硬度试验，’;—重新编写了前言，代替ISO6506-3的前言;—对于ISO6506-3所引用的其他国际标准，本部分直接引用与之相对应的我国

7、国家标准。本部分代替并废止GB/T6270-1997《标准布氏硬度块的标定》。本部分与GB/T6270-1997相比主要变化如下:—修改了名称;—标准结构和编写格式符合GB/T1.1-2000(标准化工作导则第1部分:标准的结构和编写规则》的要求，技术内容与ISO6506-3:1999保持一致;一一增加了引言，删除了ISO前言;—第8章补充了标准块的附带文件(1997年版的第8章;本版的第8章);—增加了第9章关于标准块有效性的规定(见第9章)。本部分由中国机械工业联合会提出。本部分由全国试验机标准化技术委员会归口。本部分负责起草单位:长春试验机

8、研究所。本部分参加起草单位:上海材料试验机厂、莱州华银试验仪器有限公司、泉州市丰泽东海仪器硬度块厂。本部分主要起草人:郭永祥、桑佩君、周