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clearfix"><h1>南京RD12M焊絲工廠歡迎來電簡敏精密五金制造供應</h1><div id="8rjbyke" class="proBig"><div id="kog7ga2" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265669218750/3372736.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="d7xurji" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265669218750/3372736.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ujqaw3x" class="content"><p><span>需求數量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產品關鍵詞：</span>南京RD12M焊絲工廠</p><p><span>***更新：</span>2020-06-11 08:20:25</p><p><span id="click" >瀏覽次數：0次</span></p><a rel="nofollow" class="button">聯系我們</a></div></div><div id="e8tqik3" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">簡敏精密五金制造(上海)有限公司</a></p><p><span>聯系人：</span>龔先生</p><p><span>郵箱: </span></p><p><span>電話: </span>13818473006</p><p><span>傳真: </span>021_69726282</p><p><span>網址: </span></p><p><span>手機: </span>021-69726282</p><p><span>地址: </span>顧北東路365號C區(qū)1101</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="os2enj9" class="page-proshow02"><p class="title">詳細說明</p><div id="enurovp" class="box"><p><p> 有利于保證焊縫的機械性能。不重要的焊縫也可用基本金屬切條作焊絲。氣體熔劑：由硼酸甲醇的混合液（沸點55℃）揮發(fā)而成。由乙炔帶入火焰中與氧反應生成硼酐（B2O3）、二氧化碳和水蒸氣。硼酐凝結到基本金屬及焊絲上。焊接時產生強烈脫氧作用，與氧化物生成硼酸鹽，以鹽膜狀態(tài)浮在熔池表面，能有效地防止鋅的蒸發(fā)。氣體熔劑已成功地應用于黃銅的焊接和堆焊上。（2）火焰性質：預熱時采用中性火焰，以免工件表面氧化。而焊接時應采用輕微氧化焰，南京RD12M焊絲工廠，這是因為輕微氧化焰雖然燒損一部分鋅，使熔池表面形成一層氧化鋅薄膜（熔點1800℃），但它支能防止熔池中的鋅大量蒸發(fā)。輕微氧化焰到何種程度為宜，一般是對好中性焰后，用手稍微調一下氧氣調節(jié)閥，聽到有“吃、吃”聲就可以了。（3）焊粉的使用方法：一般不將焊粉灑在工件上。為了節(jié)省沾焊粉時間，將焊粉倒入長槽中，再把用焊炬加熱的焊絲橫放在焊粉中滾動，南京RD12M焊絲工廠，使焊絲表面沾上一層焊粉（約為—1毫米厚），然后排列在傾斜的架子上，以備使用。（4）操作要點：焊炬上下跳動，不作橫向擺動。焊速較快。其它與紫銅氣焊相同。2．黃銅的焊條電弧焊焊條采用青銅芯焊條，南京RD12M焊絲工廠，如ECuSn-B（T227）、ECuAl-C（T237）。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京RD12M焊絲工廠" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265669218750/3372736.png"></div><p> 也可用于硬化性大的鉻鋼（如Cr5Mo、Cr9Mo、Cr13、Cr28等）以及異種鋼的焊接。A407不銹鋼焊條符合GBE310-15相當AWSE310-15說明:A407是堿***皮的Cr26Ni21純奧氏體不銹鋼焊條。熔敷金屬900~1100℃高溫條件下具有優(yōu)良的抗氧化性。采用直流反接，可進行全位置焊接。由于焊縫為純奧氏體，抗熱裂性能不及雙相組.織的好。用途:用于同類型的耐熱不銹鋼，不銹鋼襯里以及異種鋼的焊接，也可用來焊接硬化性大的Cr5Mo、Cr9Mo、Cr13及Cr28鋼等的焊接。A412不銹鋼焊條符合GBE310Mo-16相當AWSE310Mo-16說明:A412是鈦鈣型藥皮的Cr26Ni21Mo2純奧氏體不銹鋼焊條。由于熔敷金屬中添加了Mo，故耐蝕性、耐熱性、抗裂性能均比A402、A407有所改善。交直流兩用，操作工藝性能良好。用途:用于焊接在高溫下工作的耐熱不銹鋼，也可用來焊接不銹鋼襯里、異種鋼等。在焊接淬硬性高的碳鋼、低合金鋼時韌性極好。A422不銹鋼焊條說明:A422是鈦鈣型藥皮的Cr25Ni18Mn8不銹鋼焊條,交直流兩用。由于焊縫中加入了較多的Mn，因而提高了焊縫的抗熱裂性能。用途:用于補焊爐卷軌機上的Cr25Ni20Si2奧氏體耐熱鋼卷筒，也可用于焊接異種鋼等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京RD12M焊絲工廠" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265685263672/7237309.png"></div><p> 要做到以下要求：一是為了保證試板坡口兩側有良好的熔合，采用的焊接電流宜稍大，當用ф，焊接電流以90A為宜；二是要采用短弧施焊，以利于保護熔池，同時利用電弧作用力把熔池鐵液托住，并且把部分熔滴過渡到試件背面（即上面）；三要使后續(xù)熔池覆蓋前一熔池的1/2，并適當提高焊接速度，以減小熔深，減小液態(tài)金屬自身重力，避免焊縫金屬下垂上凹；四是保持正確的運條方式，使焊條與試板左右兩側呈90o，并與焊接方向呈70o～80o的夾角。施焊時，焊件背面應保持2/3弧柱，以利于熔滴過渡和熔池保護。運條時應左右輕微擺動。當焊至接近試板中部時，因變形使間隙變窄，此時可不使焊條左右橫向擺動，而沿焊接方向連弧焊接；五是更換焊條接頭要迅速，應在接頭部位處于紅熱狀態(tài)下迅速引弧，盡快恢復焊接狀態(tài)，這樣可使接頭處成形良好，也可減少氣孔、夾渣等缺點。填充層的焊接填充層采用左右擺動運條方式連弧焊接，操作昱應注意兩點：一要使焊條與試板在左右方向上處于垂直狀態(tài)，以避免填充層焊縫左右不等厚，影響焊縫成形。為了把握好角度，有的焊工改用雙手握焊鉗施焊，效果不錯；二要將道間熔渣清理干凈，避免出現夾渣。填充層以2層為宜，較薄的焊層。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京RD12M焊絲工廠" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265685117187/5944643.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/223441.html</p></div></div></div></div></div><div id="v7vc3yf" class="page-right twoColRt"><div id="nx2yf72" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="7jqikrl" class="recomPic 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