ISO/TR 23602-2005 链条钢的韧性

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                   【英文标准名称】:     Toughness of chain steels            【原文标准名称】:     链条钢的韧性            【标准号】:     ISO/TR 23602-2005            【标准状态】:     现行            【国别】:     国际            【发布日期】:     2005-07    【实施或试行日期】: 【发布单位】: 国际标准化组织(ISO)【起草单位】: ISO/TC 111【标准类型】: ()【标准水平】: ()【中文主题词】: 化学成分;抗拉试验;材料;提升设备;钢链条;圆钢链条;热处理;韧性;链条;断裂韧性;钢;链式吊索【英文主题词】: chain slings;lifting equipment;steel chains;fracture toughness;tensile tests;steels;chemical composition;chains;round steel chains;heat treatment;materials;toughness【摘要】: The objective of the investigation presented in this Technical Report was to quantify the required materialtoughness for the operational safety of round steel chains. The determination of this toughness must takeplace under unfavourable boundary conditions, i.e. at the lowest permissible operating temperature ondamaged (precracked) chains. On the basis of characteristic properties determined on chains and three-pointbend (TPB) specimens and the notch impact energy, a load-bearing and brittle fracture transition temperatureconcept was elaborated. From the correlation of the fracture stress of chains, fracture mechanicscharacteristic properties and the notch impact energy, minimum values of the notch impact energy can bederived which yield adequate safety against fracture for the damaged chain. Furthermore, in order to excludebrittle failure of chains, the position of the lowest permissible operating temperature relative to the NDT(nil-ductility transition) temperature was determined. Finally, the linkage of the determined fracture mechanicsproperties to notch impact energy values and the definition of the requirements for these values furnishes asimple test and acceptance procedure for chain materials and chain types.【中国标准分类号】: H46【国际标准分类号】: 53_020_30;77_140_65【页数】: 51P;A4【正文语种】: 英语