标准摘要
[中文适用范围]： 本文件规定了固溶退火条件下提供的铁素体/奥氏体（双相）不锈钢部件和焊接条件下的制造焊缝中与相关性能相关的微观结构表征的质量控制测试方法和测试条件。 本文件补充了有关破坏性测试方法的相关产品和制造标准，包括试样取样、测试条件和测试验收标准，以表明双相不锈钢中不含有害金属间相和沉淀物。 此外，本文件还规定了测试实验室的测试和测试结果的记录。 注 1：本文件基于双相不锈钢在海上石油和天然气工业应用中的经验，包括上部和海底碳氢化合物服务、海水服务以及结构使用。 注2：奥氏体间距与双相不锈钢在采用阴极保护的海底应用中对氢致应力开裂（HISC）的敏感性有关。 这不属于本文档的范围。 参考DNV/GL RP-F112[4]。 [外文原描述]： ISO 17781:2017 specifies quality control testing methods and test conditions for the characterization of microstructure in relation to relevant properties in ferritic/austenitic (duplex) stainless steel components supplied in the solution annealed condition and fabrication welds in the as welded condition. ISO 17781:2017 supplements the relevant product and fabrication standards with respect to destructive testing methods including sampling of test specimens, test conditions and test acceptance criteria to show freedom from deleterious intermetallic phases and precipitates in duplex stainless steels. In addition, this document specifies the documentation of testing and test results by the testing laboratory. NOTE 1 This document is based upon experience with duplex stainless steels in offshore oil and gas industry applications including topside and subsea hydrocarbon service, sea water service, as well as structural use. NOTE 2 The austenite spacing is relevant to the susceptibility of duplex stainless steels to hydrogen-induced stress cracking (HISC) in subsea applications where cathodic protection is applied. This falls outside the scope of this document. Reference is made to DNV/GL RP-F112[4].
英文名称Petroleum, petrochemical and natural gas industries — Test methods for quality control of microstructure of ferritic/austenitic (duplex) stainless steels