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)果如上所述的準確性和可重復性。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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