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1 导向器及焊接裂纹由ＧＨ30 30与铸造高温合金Ｋ6 焊接的导向器 ,在 70 0～ 80 0℃的高温中 ,经 1 5ｈ运行后 ,发现有 7件导向器根部发生裂纹。叶片材质为铸造高温合金Ｋ6,叶片表面渗Ａｌ,叶片一端插入导向器内环 ,另一端与导向器外环用焊条电弧焊连接 ,导向器外环材料ＧＨ30
1 Guide and welding crack GH30 30 and casting high temperature alloy K6 welding guide, at 70 0 ~ 80 0 ℃ high temperature, after 15h operation, found that there are 7 guides root cracks. The material of the blade is the cast superalloy K6, the surface of the blade infiltrates Al, one end of the blade is inserted into the guide inner ring, the other end is connected with the guide outer ring by arc welding, the guide outer ring material GH30