金属和其他无机覆盖层 有金属覆层和无覆层外螺纹件和棒材表面残余脆性试验 斜楔法

[中文适用范围]： 本国际标准规定了一种在统计基础上确定氢脆或降解存在概率的方法： a) 一批电镀、自催化镀、磷化或化学加工的螺纹制品； b) 一批挂镀螺纹件或杆。 本国际标准适用于实际抗拉强度≥1000MPa（相应硬度值：300HV、303HB或31HRC）的钢制螺纹件和杆，或表面硬化的螺纹件或杆。 它不适用于紧固件。 该测试方法在氢脆消除热处理后进行，也可用于评估加工方案、条件和技术的差异。 该测试方法有两个主要功能： a) 当与统计抽样计划一起使用时，它可以用于批次验收或拒绝； b) 它可以用作控制测试，以确定各种加工步骤的有效性，包括预烘烤和后烘烤处理，以减少制品或棒中的流动氢。 尽管该测试方法能够指示那些脆化程度达到第 2 条中定义的物品，但它并不能保证完全不脆化。 本国际标准并不免除电镀商、加工商或制造商实施和监控适当的过程控制的责任。 注 1：在酸洗槽中使用抑制剂并不一定能保证避免氢脆。 注 2：附件 A 提供了有关螺纹制品中氢气引入源的指南。 [外文原描述]： This International Standard specifies a method of determining, on a statistical basis, the probability of the existence of hydrogen embrittlement or degradation in: a) a batch of barrel electroplated, autocatalytic plated, phosphated or chemically processed threaded articles; b) a batch of rack plated threaded articles or rods. This International Standard is applicable to threaded articles and rod made from steel with an actual tensile strength W 1 000 MPa (corresponding hardness values: 300 HV, 303 HB or 31 HRC) or to surface-hardened threaded articles or rods. It is not applicable to fasteners. The test method is carried out after hydrogen embrittlement relief heat treatment and may also be used for assessing differences in processing solutions, conditions and techniques. The test method has two main functions: a) when used with a statistical sampling plan it can be used for lot acceptance or rejection; b) it can be used as a control test to determine the effectiveness of the various processing steps including pre- and post-baking treatments to reduce the mobile hydrogen in the articles or rod. Although the test method is capable of indicating those articles that are embrittled to the extent defined in clause 2, it does not guarantee complete freedom from embrittlement. This International Standard does not relieve the plater, processor or manufacturer from imposing and monitoring suitable process control. NOTE 1 The use of inhibitors in acid pickling baths does not necessarily guarantee avoidance of hydrogen embrittlement. NOTE 2 Annex A provides guidance on sources of introduction of hydrogen into threaded articles.