51303932-476

51303932-476

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工業(yè)領(lǐng)域中的無損檢測類似于人們買西瓜時的“隔皮猜瓜”。買西瓜時，用手輕輕拍打西瓜外皮，聽聲響或憑手感，猜想一下西瓜的生熟，這是人們常有的習(xí)慣。如果對猜想有懷疑，則要求切開看個究竟了。

　　用手輕拍，對西瓜是無損壞的，非破壞性的，聽聲響或憑手感猜想西瓜生熟，“隔皮猜瓜”，這是生活中的“無損檢測”；而“切開看個究竟”，這就是生活中的破壞性檢查了。不論無損檢測技術(shù)如何發(fā)展，“隔皮猜瓜”這一主旨內(nèi)涵不變；對檢測結(jié)果（猜想）有懷疑時，要解剖（切開）進行驗證，這一基本思想也不變。

　　古老而簡單的無損檢測方法，如敲擊器械，聽聲響，辨別有無裂紋等，是至今沿用的方法；但因它們對缺陷的位置和大小，做不出“基本相符”的判斷，而不被視為無損檢測的技術(shù)方法。只有技術(shù)方法才可保證無損檢測結(jié)果如上所述的準(zhǔn)確性和可重復(fù)性。通常而言的無損檢測技術(shù)方法，指射線檢測（RT）、超聲檢測（UT）……等等。

　　無損檢測：在不破壞前提下，檢查工件宏觀缺陷或測量工件特征的各種技術(shù)方法的統(tǒng)稱。

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