摘要
对黄台发电厂７＃机末级叶片断口进行了分析。认为，在该叶片进汽侧靠近头部的硬质合金堆焊层中，由于成分偏析，夹杂等原因产生微小裂纹，并在运行中产生应力腐蚀或腐蚀疲劳裂纹并扩展，最终导致叶片断裂。
The fracture surface of the blade was analyzed. The result shows that segregation and inclusions in the hard alloy welding layer caused initiation of micro-crack , leading to the fracture of the blade during operation as a result of stress corrosion and corrosion fatigue.
出处
《理化检验（物理分册）》
CAS
1999年第8期365-367,362,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
