可热处理钢、合金钢和易切削钢.第3部分:表面硬化钢

[中文适用范围]： 本文件规定了下列产品的交货技术要求： — 热成型半成品（如大钢坯、钢坯、板坯）（见注释 1）； — 棒材（见注释 1）； — 线材； — 成品扁平材；以及 — 锤锻件或落锻件（见注释 1）。上述产品由表 3 所列的表面硬化非合金钢或合金钢制成，并按表 1 中不同类型产品所给出的热处理条件和表 2 所给出的表面条件供应。这些钢材一般用于制造表面硬化机器零件。 注 1：锤锻半成品（大钢坯、钢坯、板坯等）、无缝轧环和锤锻棒材均属于半成品或棒材，不属于“锤锻件和落锻件”这一术语。注 2：对于符合表 3 中化学成分要求的钢材，如果以上述以外的其他产品形式或处理条件供应，或者用于特殊用途，以及其他相关的国际标准，请参阅参考书目。 [外文原描述]： This document specifies the technical delivery requirements for — semi-finished products, hot formed (e.g. blooms, billets, slabs) (see NOTE 1), — bars (see NOTE 1), — wire rod, — finished flat products, and — hammer or drop forgings (see NOTE 1) manufactured from the case-hardening non-alloy or alloy steels listed in Table 3 and supplied in one of the heat-treatment conditions given for the different types of products in Table 1 and in one of the surface conditions given in Table 2. The steels are, in general, intended for the manufacture of case-hardened machine parts. NOTE 1 Hammer-forged semi-finished products (blooms, billets, slabs, etc.), seamless rolled rings and hammerforged bars are covered under semi-finished products or bars and not under the term “hammer and drop forgings”. NOTE 2 For International Standards relating to steels conforming with the requirements for the chemical composition in Table 3, however, supplied in other product forms or treatment conditions than given above or intended for special applications, and for other related International Standards, see the Bibliography.