奥氏体不锈钢管道应力腐蚀开裂检测技术对比

发布时间：2018-07-13 14:31

【摘要】：通过对比渗透检测技术、X射线数字成像检测技术和涡流阵列检测技术对三通-管帽对接接头试样内、外表面检测的检测速度、表面开口应力腐蚀开裂检测能力和近表面应力腐蚀开裂检测能力,得出如何有效检测在役奥氏体不锈钢压力管道应力腐蚀开裂的方法。以带有应力腐蚀开裂的三通-管帽试件为检测对象,采用溶剂去除型着色渗透检测技术、X射线数字成像检测技术和涡流阵列检测技术进行试验,并对试验结果进行比较。结果表明:应力腐蚀开裂的面积型缺陷的特有属性和数字平板探测器不能弯曲的特性,会影响X射线数字成像检测技术对管道应力腐蚀开裂的检测能力,但其对近表面应力腐蚀开裂或埋藏性应力腐蚀开裂的检测能力仍优于涡流阵列检测技术和渗透检测技术;涡流阵列检测技术对表面开口应力腐蚀开裂的检测能力与渗透检测技术相近,对近表面应力腐蚀开裂的检测能力远优于渗透检测技术,检测速度也远快于渗透检测技术,故可在满足检测条件的情况下用涡流阵列检测技术替代渗透检测技术。
[Abstract]:By comparing the penetration detection technology with the X-ray digital imaging technology and the eddy current array testing technology, the detection speed of the inner and outer surfaces of the butt joint of the three-way and tube cap is measured. The detection ability of surface open stress corrosion cracking and near surface stress corrosion cracking is discussed. The effective method for detecting stress corrosion cracking of austenitic stainless steel pressure pipes in service is obtained. Taking the specimen with stress corrosion cracking (SCC) as the test object, the experiment was carried out by using solvent removal coloring penetration detection technique and eddy current array detection technology. The experimental results were compared with each other. The results show that the unique properties of the area type defects of stress corrosion cracking and the non-bending characteristics of digital flat panel detectors will affect the ability of X-ray digital imaging to detect the stress corrosion cracking of pipelines. However, its ability to detect near surface stress corrosion cracking or buried stress corrosion cracking is still superior to eddy current array and penetration detection. The detection ability of eddy current array for surface open stress corrosion cracking is similar to that of osmotic detection, and the detection ability for near surface stress corrosion cracking is much better than that for osmotic detection, and the detection speed is also much faster than that of osmotic detection. Therefore, the eddy current array detection technology can be used to replace the osmotic detection technology under the condition of satisfying the detection conditions.
【作者单位】：中国特种设备检测研究院;
【基金】：国家质检总局科技计划资助项目2015QK248(中国特检院内部科研项目2015内03)
【分类号】：TH49;TG115.28

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