在役球罐再次组焊冷裂纹敏感性研究
Study on Cold Cracks Sensibility of Spherical Tanks by Re-welding
李 前
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作者单位：上海市特种设备监督检验技术研究院，上海200062
中文关键字：07MnCrMoVR；再次组焊；球罐；冷裂纹
英文关键字：07MnCrMoVR; re-welding; spherical tanks; cold cracks
中文摘要：服役十年之后的07MnCrMoVR球罐需进行分拆搬迁，然后重新组焊。通过斜Y坡口对接裂纹试验和HAZ最高硬度试验对球罐材料再次组焊的冷裂纹敏感性进行研究，建议施工现场焊前预热温度不低于75℃。
英文摘要：07MnCrMoVR spherical tanks used for ten years need to be incised and removed, then re-welded. The sensibility of cold cracking of spherical tanks materials caused by re-welding were studied by means of the highest hardness in HAZ test and Y-slit type cracking test. It suggestes that the preheat temperature should be no less than 75℃ in field.