ut探傷通用規(guī)程[1]-資料下載頁
2025-09-25 09:07本頁面
【正文】 / table 3受檢區(qū)域的壁厚(mm)Wall thickness of the casting in the examined area(mm)評(píng)估的極限/Evaluation limits底波衰減最小（dB）reduction of back wall echo (min dB)能夠檢出的最小缺陷當(dāng)量(mm)/Smallest flatbottom hole diameter detectable 回波高度高于噪聲最小（dB）a Echo height above noise level min(dB) a＞10 to 201236＞20 to 100205＞100 to 250812＞250 to 50010a僅適用于由于鑄件幾何形狀的原因而無法接受一次回波的區(qū)域。Only for areas where no back wall echo is obtained to the casting geometry.，并要滿足以下要求: （不連續(xù)性）機(jī)加工表面缺陷，例如收縮、砂子和夾渣、氣孔等均不允許在機(jī)加工表面上出現(xiàn)。因此，鑄件內(nèi)部的不均勻性（缺陷），如估計(jì)在機(jī)加工以后會(huì)變?yōu)楸砻娴牟痪鶆蛐裕ㄈ毕荩?，?yīng)向采購商提出，并有采購商做出決定。The casting must be tested in the scope according to the purchase standard, and must satisfy requests below: (Discontinuity) machining surface defect, for example shrinkages, sand and slag inclusions, blowhole etc. will not be permitted in machining surface. Therefore internal discontinuities in the casting which is estimated to be change to a surface discontinuities after machining shall be brought to the attention of purchasing agent and decide upon.:/ Consideration of various types of indications:,如果不是因?yàn)橛捎阼T件的形狀或耦合問題導(dǎo)致的,則必須加以評(píng)價(jià).The following types of indication, which are proven not to be due to the casting shape or the coupling, shall be taken into consideration and evaluated in the examination of castings:一次回波的降低/reduction of the back wall echo。中間的回波/intermediate echoes 注釋 所有類型的指示有可能單獨(dú)發(fā)生也可能同時(shí)發(fā)生。NOTE all types of indications can occur alone or together.:/ Evaluation and recording of severities:應(yīng)對(duì)底波損失達(dá)到或超過表3中的回波高度進(jìn)行記錄與評(píng)定, 對(duì)于缺陷顯示超過表2里給定范圍的75%時(shí),應(yīng)將其位置利用草圖描述并記錄在檢驗(yàn)報(bào)告中。The damnify of the bottom echogetting to or above the height of echoes in table 3 should be recorded and evaluated, for the severity indications above 75% of the range in table 2, Its situation should also be recorded in the inspection report by the ways of draft and description.:為進(jìn)一步確定缺陷的類型,尺寸等,可以調(diào)整探頭參數(shù),檢驗(yàn)頻率或利用其它檢驗(yàn)方法來確定.Determination of severity: In order to determine the types and dimensions of severity, probe parameter, inspection frequencies can be modified or use other inspection methods.:/ The inspection of severity length amp。 thickness缺陷長度的確定按附圖2來確定：“不可測量”缺陷用“6dB”法， “可測量” 用“12 dB 和20dB”法。 Confirm the length according to the attached drawing 2：The “6dB”is used to“ not measurable” and The “12 dB and 20dB”is used to “measurable”. Figure 2 不可測量/not measurable 可測量/measurable the severity thickness according to the attached drawing 3.Figure of thickness(depth extension) with normal probes d = t (S1+S2)檢驗(yàn)報(bào)告至少需含有以下信息:The examination report shall contain at least the following information: 對(duì)歐洲標(biāo)準(zhǔn)的引用(EN 126803)Reference to this European standard (EN 126803).被檢驗(yàn)的鑄件的特征數(shù)據(jù)Characteristic data of the examined casting.檢驗(yàn)的范圍Extent of examination.所使用的檢驗(yàn)設(shè)備的類型Type of examination equipment used.使用的探頭Probes used.檢驗(yàn)區(qū)域上使用的檢驗(yàn)技術(shù) Examination technique with reference to the examined area.用于靈敏度設(shè)定所必需的所有數(shù)據(jù)All data necessary for the sensitivity setting.超聲波探傷適宜性的詳細(xì)說明Details of ultrasonic examination suitability.所記錄的缺陷的所有特點(diǎn)信息(例如底波的衰減、貫穿壁厚方向上缺陷的位置和尺寸、長度、面積和平底孔的直徑)以及缺陷位置的描述（示意圖或照片）Information on all characteristic features of discontinuities to be recorded(. back wall echo reduction, position and dimension in throughwall direction, length, area and flatbottomed hole diameter)and the description of their position (sketch or photograph).檢驗(yàn)日期以及負(fù)責(zé)人簽字Date of the examination and name of the responsible person.內(nèi)容總結(jié)
（1）超聲波探傷通用規(guī)程
UT General Specification
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