【摘要】：利用超聲波水浸聚焦入射法對(duì)1 mm厚的SUS304奧氏體不銹鋼板點(diǎn)焊接頭進(jìn)行超聲C掃描成像檢測(cè).分析了不同焊接工藝參數(shù)下的C掃描圖像特征,甄別了飛濺、焊穿等典型焊接缺陷,并提取其對(duì)應(yīng)的A掃描信號(hào).基于C掃描圖像對(duì)焊核直徑進(jìn)行了測(cè)量,并與焊核切口端面尺寸進(jìn)行了比較.結(jié)果表明,基于超聲波水浸聚焦入射法得到的C掃描圖像,能有效觀測(cè)焊核內(nèi)部形貌特征.焊接電流超過8 k A,電極力小于2 700 N時(shí),超聲波C掃描圖像中清晰反映出飛濺、焊穿等缺陷,其對(duì)應(yīng)區(qū)域的A掃描信號(hào)與正常熔核區(qū)波形特征有明顯差異;借助超聲C掃描圖像測(cè)得的焊核直徑為4.39~5.25 mm.
[Abstract]:Ultrasonic C-scan imaging of 1 mm thick SUS304 austenitic stainless steel plate spot welded joint was performed by ultrasonic immersion focusing incident method. The characteristics of C-scan images under different welding parameters were analyzed, and the typical welding defects such as spatter and penetration were screened out, and the corresponding A-scan signals were extracted. The diameter of the welding core is measured based on C-scan image and compared with the size of the cut face of the welding core. The results show that the C-scan image based on the ultrasonic immersion focused incident method can effectively observe the internal morphology of the welding nucleus. When the welding current is more than 8 Ka and the electric strength is less than 2 700 N, the ultrasonic C scan image clearly reflects the defects such as spatter and weld penetration, and the A scan signal of the corresponding area is obviously different from that of the normal fusion zone. The diameter of the welding core measured by ultrasonic C-scan image is 4.39 to 5.25 mm..
【作者單位】： 昆明理工大學(xué)機(jī)電工程學(xué)院創(chuàng)新制造技術(shù)研究所;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51565022,51565023)
【分類號(hào)】：TG441.7

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張宏樂;王梅生;;一種改善相關(guān)子波特性的掃描信號(hào)[J];物探裝備;2006年S1期

2 H.A.K.Edelmann;肖玲;;連續(xù)振動(dòng)法的編碼掃描技術(shù)[J];國外油氣勘探;1984年03期

3 卞學(xué)祖;PELCO先進(jìn)Ⅱ控制系統(tǒng)操作手冊(cè)(三)——ESG部分[J];物探裝備;1999年04期

4 張宏樂;;一種改善相關(guān)子波特征的掃描信號(hào)——“旋轉(zhuǎn)相位,對(duì)數(shù)分段”掃描信號(hào)[J];物探裝備;1999年03期

5 卞學(xué)祖;;PELCO先進(jìn)Ⅱ控制系統(tǒng)操作手冊(cè)(二)——ESG部分[J];物探裝備;1999年03期

6 沈媛媛;劉益成;;基于Matlab的偽隨機(jī)掃描信號(hào)設(shè)計(jì)與研究[J];石油儀器;2009年02期

7 蹇清平;佘新平;劉益成;;基于Matlab的偽隨機(jī)掃描信號(hào)的仿真與研究[J];石油天然氣學(xué)報(bào);2010年06期

8 卞學(xué)祖;PELCO先進(jìn)Ⅱ控制系統(tǒng)操作手冊(cè)(一)——ESG部分[J];物探裝備;1999年02期

9 曹務(wù)祥;李憲慶;郭洪啟;;可控震源掃描信號(hào)的整形設(shè)計(jì)方法[J];石油物探;2009年06期

10 鄭恭明;張海;雷雪梅;孫祥娥;;基于片上可編程系統(tǒng)的可控震源掃描信號(hào)研究與設(shè)計(jì)[J];物探與化探;2012年03期

相關(guān)碩士學(xué)位論文 前1條

1 劉凱;基于陣列A掃描信號(hào)的超聲相控陣成像方法研究[D];中北大學(xué);2015年

，

本文編號(hào)：2437181