硬质合金牌号 第2部分：凿岩及工程用硬质合金牌号 Grades of cemented carbide— Part 2：Grades of cemented carbide for rock drilling and engineering  ICS  77.160 CCS  H 70   中华人民共和国国家标准 GB/T 18376.2—2024 代替 GB/T 18376.2—2014 2024-11-2 8发布 2025-06-0 1实施     国家市场监督管理总局 国家标准化管理委员会 发 布 目　　次 前言   ·····································································································   Ⅲ 引言   ·····································································································   Ⅳ 1     范围   ··································································································   1 2     规范性引用文件   ······················································································   1 3     术语和定义   ···························································································   1 4     牌号表示规则及分类代号   ············································································   1      4.1     牌号表示规则   ····················································································   1      4.2     分类代号   ·························································································   1 5     技术要求   ······························································································   2      5.1     化学成分、物理与力学性能   ·····································································   2      5.2     金相组织结构   ····················································································   3      5.3     相同牌号硬质合金物理与力学性能的极差   ······················································   3 6     试验方法与检验规则   ·················································································   4 7     硬质合金牌号材质的典型值   ··········································································   4 GB/T 18376.2—2024     Ⅰ