热处理钢、合金钢和易切削钢.第2部分:淬火和回火合金钢

[中文适用范围]： ISO 683 的本部分规定了热成型半成品的交货技术要求，例如钢坯、钢坯、板坯（见注释 1）、棒材（见注释 1）、线材、成品扁平材和锤锻件或落锤锻件（见注释 1），这些半成品由表 3 中列出的直接淬火钢和火焰或感应淬火钢制成，或由表 2 中列出的表面条件制成。这些钢通常用于制造淬火和回火或奥氏体回火钢（见表 8 和 9）。 ISO 683 本部分给出的机械性能要求仅限于相关表 8 中给出的尺寸，并以给定的热处理状态或表 3 列出的火焰或感应淬火钢供应。锤锻半成品棒材和其他产品（大方坯、方坯、板坯等）、无缝轧制环和半成品或棒材不在注释 2 的考虑范围内。为简化起见，“淬火和回火”一词，除非另有说明，注释 3 也适用于以下使用的国际标准，也适用于奥氏体回火状态。但是，对于符合表 3 中化学成分要求的钢，但以上述以外的产品形式或处理条件供应或用于特殊用途，注释 4 适用于特殊情况和其他相关国际标准，见参考文献。 ISO 683 的本部分不适用于 ISO 683-18 和 ISO 4954 中涉及的光亮产品和棒材。就冷镦而言，本标准中除非另有说明，均指“淬火和回火”。有关同样用于奥氏体回火状态的国际标准，请参见注释 3。ISO 683 的本部分不适用于 ISO 683-18 和 ISO 4954 中涉及的光亮产品，请参见注释 2。对于特殊情况，可在询价和订货时协商变更或补充这些技术交货要求（参见 5.2 和附录 B）。除 ISO 683 的本部分外，还适用 ISO 404 的一般技术交货要求。 [外文原描述]： ISO 683-2:2016 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 direct hardening alloy steels and the alloy flame- and induction-hardening 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 quenched and tempered or austempered (see 3.2 and Note 2) and flame- or induction-hardened machine parts (see Tables 8 and 9). The requirements for mechanical properties given in ISO 683-2:2016 are restricted to the sizes given in the relevant Table 8. NOTE 1 Hammer-forged semi-finished products (blooms, billets, slabs, etc.), seamless rolled rings and hammer-forged bars are in the following covered under semi-finished products or bars and not under the term "hammer and drop forgings". NOTE 2 For the purposes of simplification, the term "quenched and tempered" is, unless otherwise indicated, used in the following also for the austempered condition. NOTE 3 For International Standards relating to steels complying 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. NOTE 4 ISO 683-2 :2016 does not apply to bright products and bars and wire rod for cold heading. For such products, see ISO 683‑18 and ISO 4954. In special cases, variations in these technical delivery requirements or additions to them can form the subject of an agreement at the time of enquiry and order (see 5.2 and Annex B). In addition to ISO 683-2:2016, the general technical delivery requirements of ISO 404 are applicable.