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style="font-size: 14px; font-family: 微軟雅黑, "Microsoft YaHei";">聯系人：趙經理 13720272020 </span></p><p style="line-height: 2em;"><span style="font-size: 14px; font-family: 微軟雅黑, "Microsoft YaHei";">地址：武漢市東湖新技術開發區關南四路35號</span></p><p style="line-height: 2em;"><span style="font-size: 14px; font-family: 微軟雅黑, "Microsoft YaHei";">網址 : www.popechart.com </span></p><p><br/></p></div> </div> </div> <div class="right"> <div class="sitemp clearfix"> <h2> 水下電焊和水下切割公司的原理是什么? </h2> <div class="site">您的當前位置： <a href="http://www.popechart.com/">首頁</a> >> <a href="http://www.popechart.com/news/">新聞中心</a> >> <a href="http://www.popechart.com/news/xydt/">行業新聞</a> </div> </div> <div class="content">  <div class="news_detail"> <h1 class="title">水下電焊和水下切割公司的原理是什么?</h1> <div class="info_title clearfix"> <h3 class="title_bar"> 發布日期：<span>2020-05-08</span> 作者：<span>浩川潛水</span> 點擊：<span><script src="http://www.popechart.com/data/include/newshits.php?id=447"></script></span> </h3> <div class="share">  <div class="bdsharebuttonbox"> <a href="#" class="bds_more" data-cmd="more"></a> <a href="#" class="bds_qzone" data-cmd="qzone"></a> <a href="#" class="bds_tsina" data-cmd="tsina"></a> <a href="#" class="bds_tqq" data-cmd="tqq"></a> <a href="#" class="bds_renren" data-cmd="renren"></a> <a href="#" class="bds_weixin" data-cmd="weixin"></a> </div> <script> window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdPic":"","bdStyle":"0","bdSize":"16"},"share":{},"image":{"viewList":["qzone","tsina","tqq","renren","weixin"],"viewText":"分享到：","viewSize":"16"},"selectShare":{"bdContainerClass":null,"bdSelectMiniList":["qzone","tsina","tqq","renren","weixin"]}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)]; </script>  </div> </div> <div class="content"><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"> <strong> (一)干法焊接</strong></span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　這是選用大型氣室罩住焊件、焊工在氣室內施焊的方法，由所以在枯燥氣相中焊接，其安全性較好。在深度逾越空氣的潛入規模時，由于增加了空氣環境中有些氧氣的壓力，簡略發作火星。因此應在氣室內運用慵懶或半慵懶氣體。干法焊接時，焊工應穿戴特制防火、耐高溫的防護服。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　與濕法和有些干法焊接對比，干法焊接安全性Z好，但便用局限性很大，運用不廣泛。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"><br/></span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　<strong>　(二)有些干法焊接</strong></span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　有些干法是焊工在水中施焊，但人為地將焊接區周圍的水排開的<a href='http://www.popechart.com/product/622.html' target='_blank' class='key_tag'><font color=#2086ee><strong>水下焊接</strong></font></a>方法，其安全措施與濕法相似。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　由于有些干法還處于研討當中，因此運用尚不廣泛。.320-</span></p><p><br/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　<strong>　(三)濕法焊接</strong></span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　濕法焊接是焊工在水下直接施焊，而不是人為地將焊接區周圍的水排開的水下焊接方法。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　電弧在水下燃燒與埋弧焊相似，是在氣泡中燃燒的。焊條燃燒時焊條上的涂料構成套筒使氣泡安穩存在，因此使電弧安穩，如圖8-1所示。要使焊條在水下安穩燃燒，必須在焊條芯上涂一層一定厚度的涂藥，并用白臘或其他防水物質浸漬的方法，使焊條具有防水性。氣泡由氫、氧、水蒸氣和由焊條藥皮燃燒發作的氣泡;渾濁的煙霧生的其他氧化物。為戰勝水的</span></p><p><br/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　冷卻和壓力作用構成的引弧及穩弧艱難，其引弧電壓要高于大氣中的引弧電壓，其電流較大氣中焊接電流大15%～20%。</span></p><p><br/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　水下濕法焊接與干法和有些干法焊接對比，運用Z多，但安全性Z差。由于水具有導電性，因此防觸電成為濕法焊接的首要安全伺題之一。水下焊接與切開的事端因素</span></p><p style="text-align: center; line-height: 1.75em;"><img src="/data/upload/image/20190429/1556504766914299.jpg" title="水下切割" alt="水下切割" width="500" height="333" border="0" vspace="0" style="width: 500px; height: 333px;"/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　水下焊接與切開的致險要素的特點是：電弧或氣體火焰在水下運用，它與在大氣中焊接或通常的潛水工作對比，具有更大的危險性。</span></p><p><br/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"> 目前，世界各國正在應用和研究的水下焊接方法種類繁多，可以說，陸上生產應用的焊接技術，<a href='http://www.popechart.com/product/618.html' target='_blank' class='key_tag'><font color=#2086ee><strong>水下切割公司</strong></font></a>幾乎都在水下嘗試過，但比較成熟、應用較多的還是幾種電弧焊。水下焊接一般依據焊接所處的環境大體上分為三類：濕法水下焊接、干法水下焊接和局部干法水下焊接。但隨著水下焊接技術的發展：又出現了一些新的水下焊接方法：水下螺柱焊接、水下爆炸焊接、水下電子束焊接和水下鋁熱劑焊接等。</span></p><p><br/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"> 水下環境使得水下焊接過程比陸上焊接過程復雜得多，除焊接技術外，還涉及到潛水作業技術等諸多因素，水下焊接的特點是:</span></p><p><br/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　(1) 可見度差水對光的吸收、反射和折射等作用比空氣強得多，因此，光在水中傳播時減弱得很快。另外, 焊接時電弧周圍產生大量氣泡和煙霧，使水下電弧的可見度非常低。在淤泥的海底和夾帶泥沙的海域中進行水下焊，水中可見度就更差了。長期以來，這種水下焊接基本屬于盲焊,嚴重地影響了潛水焊工操作技術的發揮, 這是造成水下焊接容易出現缺陷, 焊接接頭質量不高的重要原因之一。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　(2) 焊縫含氫量高氫是焊接的大敵，如果焊接中氫含量超過允許值，很容易引起裂紋，甚至導致結構的破壞。水下電弧會使其周圍水產生熱分解, 導致溶解到焊2</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　縫中的氫增加，一般焊接中擴散氫含量27～ 36 Lg?g , 為陸地酸性焊條焊接時的好幾倍。水下焊條電弧焊的焊接接頭質量差與氫含量高是分不開的。</span></p><p><br/></p><p style="text-align: center; line-height: 1.75em;"><img src="/data/upload/image/20190428/1556437099417612.jpg" title="水下切割公司" alt="水下切割公司" width="500" height="333" border="0" vspace="0" style="width: 500px; height: 333px;"/></p><p style="line-height: 1.75em;"><br/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　(3) 冷卻速度快水下焊接時，海水的熱傳導系數較高，是空氣的20 倍左右。即使是淡水，其熱傳導系數也為空氣的十幾倍。若采用濕法或局部干法水下焊接時，被焊工件直接處于水中，水對焊縫的急冷效果明顯，容易產生高硬度的淬硬組織。因此，只有采用干法焊接時，才能避免冷效應。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　(4) 壓力的影響隨著壓力增加(水深每增加10m ，壓力增加0. 1M Pa) 。電弧弧柱變細嗎，焊道寬度變窄，焊縫高度增加，同時導電介質密度增加，從而增加了電離難度，電弧電壓隨之升高，電弧穩定性降低，飛濺和煙塵也增多。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">　　(5) 連續作業難以實現，由于受水下環境的影響與限制，許多情況下不得不采用焊一段嗎，停一段的方法進行，因而產生焊縫不連續的現象。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"> <a href='http://www.popechart.com/product/616.html' target='_blank' class='key_tag'><font color=#2086ee><strong>水下切割</strong></font></a>后的檢查與補割</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"> ① 在可見度較好的水中，可通過調查切割時噴發的火焰及熔渣的方歷來判別。當割縫沒有被割透時，暗赤色的火焰向割條方向反射，噴出的氧氣也因受阻而從正面上浮，使得周圍的水劇烈攪動；假如割縫已被割透，熔渣會隨氧流向反面沖出、火焰的赤色減退而微帶藍綠色，并且氣流曉暢、氣泡少、水的動搖聲也小。 </span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"> ② 在可見度較低的渾水中切開時，潛水員不易調查到火焰及熔渣的噴發狀況，但可憑仗經歷來判別。若割縫未被割透，氣流會受阻，對割炬的反沖力增大，割炬跳動的表象加重；若割縫已被接連割透，則這種割炬跳動的表象較弱，感受割炬很平穩。 </span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;"> ③ 對已切割完的割縫，可用細鐵絲或薄鐵片等刺進割縫中沿割縫查看，如通行無阻，則表明割縫已悉數割透。</span></p><p><br/></p></div> <h3 class="tag">本文網址：http://www.popechart.com/news/447.html </h3> <h3 class="tag">關鍵詞：<a 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