GB/T 231.3-2002金属布氏硬度试验　第3部分：标准硬度块的标定.pdf

ICS77.040.10 H 22 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 监 督检 验 检 疫 总 局 GB/T231.3-2002 目 次 月U舀 。。·，····。····。·······。····················································。·，······。···············。····… …”。。·… … 皿 引言 ··························································································，·····················…… 1V 1 范围 ····················································，，······‘···················，·······················…… 1 2 规范性引用文件 .·······…… 1 3 标准块的制造 ···，，·····，，，，· ··············，·，，，，，··········· ······，，，，·… ，.··············，…… ，，，1 4 标准机 ··‘····················，··························，··，，，··················································…… 2 5 标定方法 ···················································，，···················································……，3 6 压痕数 目 ········································································································…… 3 7 硬度均匀度 ······································································……，，.·······.·······.·…… 3 8 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