1 前言GB3648—87钨铁国家标准自1987年发布实施以来,发现此国家标准在执行过程中存在标准水平高、部分杂质元素质量过剩、国内资源条件不满足产品需要等问题。现钨铁国家标准已被冶金工业部冶质字(1995)09号文列入了1995年国家标准修订计划,在新的钨铁国家标准修订之前,笔者将自己对现行 GB3648—87钨铁国家标准存在的问 1 Preface GB3648-87 tungsten iron national standards since its promulgation in 1987, found that the implementation of this national standard in the process of high standards, some of the excess quality of the impurity elements, the domestic resource conditions do not meet the needs of products and other issues. Current national standards of tungsten has been Metallurgical Industry Ministry of quality word (1995) No. 09 included in the 1995 national standards revision plan, before the revision of the new tungsten iron national standards, the author will own the current GB3648-87 tungsten iron countries The standard exists