问题
问答题 简答题
斜探头的K值应如何选择?
答案
参考答案:
按照尽可能使声束与缺陷垂直的原则,除考虑缺陷的取向外,应按工件的厚度选择探头,一般工件厚度较小时,选用较大K值,以便增大一次波的声程,避免近场区探伤。
当工件厚度大时,选用小K值,以减少声程过大引起的衰减,便于发现远区的缺陷。
斜探头的K值应如何选择?
参考答案:
按照尽可能使声束与缺陷垂直的原则,除考虑缺陷的取向外,应按工件的厚度选择探头,一般工件厚度较小时,选用较大K值,以便增大一次波的声程,避免近场区探伤。
当工件厚度大时,选用小K值,以减少声程过大引起的衰减,便于发现远区的缺陷。
补全对话。 | |
Mary: Hi, Tom. How nice to see you here! Tom: Hello, Mary. How are you? Mary: 1 , thank you. Tom: What are you going to buy? Mary: You know I'm preparing a party at home, so I'll buy some vegetables and fruits. Oh, yes. 2 Tom: 3 Mary: You don't have to bring anything. As long as you come and join us, 4 Tom: Thank you, Mary. Mary: 5 Bye! Tom: Bye-bye!
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