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本标准适用于JB 1265-72《电站汽轮机和船用汽轮机主轴、整体转子锻件技术条件》以及JB 1267-72《汽轮发电机转子锻件技术条件》中各类转子和主轴锻件的超声探伤.其它轴类锻件可参考使用.1 应用前提1.1 本标准采用2～2.5兆赫的探测频率,按照脉冲反射式原理,在转子和主轴锻件的外圆表面用直探头进行接触法探伤,探头的更大直径为28毫米.必要时可使用其它行之有效的方法(如变换探测频率、探头规格、增加探伤面等)进行检查.
This standard applies to JB 1265-72 “power station steam turbine and marine steam turbine spindles, the overall rotor forgings technical conditions” and JB 1267-72 “steam turbine generator forgings technical conditions” of various types of rotor and spindle forgings ultrasonic testing. Other axis Forgings may refer to the use of .1 Application prerequisites 1.1 This standard uses 2 ~ 2.5 MHz detection frequency, in accordance with the principle of pulse reflection, the outer surface of the rotor and the spindle forgings with a straight probe contact method flaw detection, probe larger diameter 28 mm If necessary, use other proven methods (such as changing the detection frequency, the probe specifications, increase the test surface, etc.) for inspection.