In order to solve the quality problems of multi-batch GH901 superalloy forgings,the forging process tests of GH901 alloy were carried out for many times.According to the ultrasonic inspection results at different positions of the forgings and the comparative analysis of the grain structure at corresponding positions,the influence of grain structure on the bottom echo loss of ul-trasonic inspection and clutter of GH901 alloy forgings was obtained.The results showed that there was a corresponding relationship between the bottom echo loss of GH901 alloy forging and the thickness and uniformity of the grain structure,and the finer the grain size,the higher the bot-tom reflection echo of ultrasonic inspection and the lower the clutter.The coarser the grain,the lower the bottom reflection echo of ultrasonic inspection and the higher the clutter.When the alloy forging grain reached grade 2 or coarser,the inspection clutter of the forging exceeded the stan-dard.When the microstructure difference of GH901 alloy forging was large,the bottom echo loss of ultrasonic inspection was not qualified.
NETL
NSTL
维普
万方数据
