小试样插销试验机的开发及在评定锅炉管件再热裂纹倾向中的运用
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作者单位：河北省电力研究院
中文关键字：小试样 插销试验 再热裂纹 12Cr1MoV
英文关键字：Small implant sample; Implant test; Reheat cracking; 12Cr1MoV
中文摘要：针对近年来出现的再热裂纹引起的电站锅炉小管泄露事故，开发了小试样插销试验机，用于对电站锅炉薄壁管件取样进行插销试验，以评定其冷裂纹再热裂纹倾向。利用开发的试验机对某电厂再热器联箱管接头进行了再热裂纹试验，结果表明部分管接头的再热裂纹敏感温度处于其工作温度期间，这造成其在使用过程中发生泄露事故。
英文摘要：In view of the boiler tubes caused by reheat cracking, a implant test system specialized in small implant sample was developed. The system is used to assess the reheat cracking tendency of the boile tube. With this new implant system, the reheat cracking test of the tube joint of the headers of reheater is assessed. It showed that reheat cracking occurrring at the service temperature of the tube was the important reason of the leaking