冷锻造紧固件及相似元件钢.doc

冷锻造紧固件和相似元件钢 第1部分 碳和低合金钢丝规格 Contents目录 1 Scope范围 2 Designation3 Information to be supplied by the purchaser采购商提供的信息 4 General概要 5 Steelmaking process制钢工艺 6 Freedom from defects故障免除 7 Decarburization脱碳 8 Chemical composition化学成分 9 Mechanical tests机械测试 10 Hardenability可淬性 11 Grain size颗粒尺寸 12 Tolerances on diameter直径公差 13 Marking标注 14 Test certificate测试证书 Appendices附录 A Options选项 B Tests for surface defects表面缺陷测试 C Detection of surface carburization表面渗碳探测 D Hardening test on steel wire for wire diameters not exceeding 25 mm 对直径不超过25mm的钢丝的淬水测试 Tables表格 1 Permitted depths of decarburization脱碳允许深度 2 Chemical composition (ladle analysis)化学成分（铸桶分析） 3 Permitted deviations in product analysis from specified range: carbon steels types O and 1 and boron-treated steels types 9 and 1 O指定范围内：碳钢类型0和1，硼处理钢9和10，产品分析中允许的背离值 4 Permitted deviations in product analysis from specified range: alloy steels types 2,3,5 and 7指定范围内：合金钢类型2,3,5 和7，产品分析中允许的背离值 5 Mechanical properties of wire金属线机械性能 6 Hardenability requirements可淬性要求 7 Steel type 1: Jominy hardenability requirements钢类型1： 8 Tolerances on diameter直径公差 9 Number of turns in reverse torsion test扭转疲劳测试中旋转的匝数 Specification规格 1 Scope范围 This Part of BS 31 11 specifies requirements for steel wire up to and including 30 mm diameter for use in the manufacture of low, medium and high tensile, cold forged fasteners and similar components in the following eight types of steel. 此BS 31 11部分指定了在生产低，中，高拉力，冷锻造紧固件和相似元件中使用的≥30mm铜丝的要求，包括以下八种类型的钢： O low carbon steel低碳钢 1 medium carbon steel中碳钢 2 carbon-molybdenum steel碳－钼钢 3 1 % chromium steel 1 %铬钢 5 1 % chromium-molybdenum steel 1 %铬－钼钢 7 1/2 % nickel-chromium-molybdenum steel 1/2 %镍－铬－钼钢 9 low carbon-manganese-boron steel低碳－锰－硼钢 10 medium carbon-manganese-boron steel中碳－锰－硼钢 NOTE. The titles of the publications referred to in this standard are listed on the inside back cover.注意：此标准引用的参考文献见内封底 2 Designation命名 The designation shall consist of the following items in the order given:命名按照以下顺序给出： (a) the