标准编号：ISO/TR 23602:2005
中文名称：链条钢的韧性
英文名称：Toughness of chain steels
发布日期：2005-07
标准范围
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.
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