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tcPro"><section class="home-main container clearfix"><div id="anevrd2" class="twoCol"><div id="a28p78l" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產品供應</a>?<a href="http://www.cdcfah.com/cp/first-_wjgj/">五金、工具</a>?<a href="http://www.cdcfah.com/cp/second-wjgj_hjclyfjqh/">焊接材料與附件</a>?<a href="http://www.cdcfah.com/cp/third-hjclyfjqh_hansi/">焊絲</a>?上海H13焊絲訂購歡迎來電簡敏精密五金制造供應</p><div id="tytpqmf" class="leftbox clearfix"><h1>上海H13焊絲訂購歡迎來電簡敏精密五金制造供應</h1><div id="x2hp8g3" class="proBig"><div id="x93k9ts" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265664882812/4463123.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ccn3ye2" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265664882812/4463123.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="c9jzvw4" class="content"><p><span>需求數(shù)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>上海H13焊絲訂購,焊絲</p><p><span>***更新：</span>2020-09-10 06:04:09</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="qka8kb0" 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(lián)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="zpv38rt" class="page-proshow02"><p class="title">詳細說明</p><div id="3zf9sym" class="box"><p><p> 氧化性酸、有機酸、氣蝕）耐熱和耐蝕性能。通常被選作電站、化工、石油等設備材料，上海H13焊絲訂購。但鉻不銹鋼一般情況下可焊性較差，應注意焊接工藝、熱處理條件及選用合適的電焊條。鉻鎳不銹鋼焊條具有良好耐腐蝕性和抗氧化性，廣泛應用于化工、化肥、石油、醫(yī)療機械制造。為防止由于加熱而產生晶間腐蝕，焊接電流不宜太大，比碳鋼焊條較少20%左右，電弧不宜過長，層間快冷，以窄焊道為宜。不銹鋼焊接要點與注意事項一、采用垂直外特性的電源，直流時采用正極性(焊絲接負極)1、一般適合于6mm以下薄板的焊接，具有焊縫成型美觀，焊接變形量小的特點。（感謝關注鼎鼎自動焊接）2、保護氣體為氬氣，純度為。當焊接電流為50~150A時，上海H13焊絲訂購，氬氣流量為8~10L/min，當電流為150~250A時，氬氣流量為12~15L/min。3、鎢極從氣體噴嘴突出的長度，以4~5mm為佳，在角焊等遮蔽性差的地方是2~3mm，在開槽深的地方是5~6mm，噴嘴至工作的距離一般不超過15mm。4，上海H13焊絲訂購、為防止焊接氣孔之出現(xiàn)，焊接部位如有鐵銹、油污等務必清理干凈。5、焊接電弧長度，焊接普通鋼時，以2~4mm為佳，而焊接不銹鋼時，以1~3mm為佳，過長則保護效果不好。6、對接打底時，為防止底層焊道的背面被氧化，背面也需要實施氣體保護。?焊絲包裝成卷或成桶以避免線材相互糾纏或折損。上海H13焊絲訂購</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海H13焊絲訂購,焊絲" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265664882812/4463123.png"></div><p> 焊條電弧焊從焊接電弧的基礎講起，按“有認知、易學會、好掌握、能操作”的原則，由淺入深、循序漸進地講解了焊條電弧焊的工藝理論和實操技能。本書主要內容包括：焊接技術基礎知識、焊條電弧焊設備、焊條的組成和分類、焊條的型號與牌號、常用焊條焊接工藝性能及選用原則、焊條的正確保管與貯存、焊條電弧焊基本工藝知識、焊接冶金基本知識、焊接接頭的組.織與性能、焊條電弧焊常見焊接缺點及其防止、典型管類和管板類焊接技術、碳弧氣刨。一、焊條電弧焊的操作焊條電弧焊**基本的操作是引弧、運條和收尾(一)引弧引弧即產生電弧。焊條電弧焊是采用低電壓、大電流放電產生電弧，依靠電焊條瞬時接觸工件實現(xiàn)。引弧時必須將焊條末端與焊件表面接觸形成短路，然后迅速將焊條向上提起2～4mm的距離，此時電弧即引燃。引弧的方法有兩種：碰擊法和擦劃法，詳見圖3—14引弧方法(1)碰擊法。也稱點接觸法或稱敲擊法。碰擊法是將焊條與工件保持一定距離，然后垂直落下，使之輕輕敲擊工件，發(fā)生短路，再迅速將焊條提起，產生電弧的引弧方法。此種方法適用于各種位置的焊接。(2)擦劃法。也稱線接觸法或稱摩擦法。擦劃法是將電焊條在坡口上滑動，成一條線，當端部接觸時，發(fā)生短路。上海H13焊絲訂購含有造渣、造氣和穩(wěn)弧成分的藥芯焊絲焊接時不需要保護氣體，稱自保護藥芯焊絲。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海H13焊絲訂購,焊絲" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265671406250/559850.png"></div><p> 黃銅焊接黃銅焊接是修鋪、加工銅材時候必不可少的加工技術。焊接，也叫作熔接、镕接，是一種常見的以加熱方式接合金屬或其他熱塑性材料如塑料的制造工藝及技術。下面將介紹黃銅的焊接性和黃銅焊接方法。黃銅焊接性黃銅是銅鋅合金，由于鋅的沸點較低，*為907℃，故焊接過程中極容易蒸發(fā)，這一點成為黃銅焊接的比較大問題。在焊接高溫作用下，焊條電弧焊時鋅的蒸發(fā)量高達40%，鋅的大量蒸發(fā)，導致焊接接頭的力學性能和耐蝕性能下降，還使之對應力腐蝕的敏感性增大。蒸發(fā)的鋅在空氣中立即被氧化成氧化鋅，形成白色的煙霧，給操作帶來很大困難，而且影響焊工身體健康，因此，焊接黃銅的場所，應加強通風等防護措施。黃銅的焊接性不良，焊接時會產生氣孔、裂紋、鋅的蒸發(fā)和氧化等問題。為了解決這些問題，在焊接時常用含硅的焊絲，因為硅在熔池表面會形成一層致密的氧化硅薄膜，阻礙鋅的蒸發(fā)和氧化，并防止氫的入侵。焊后可經470～560℃的退火處理，以消除應力防止“自裂”現(xiàn)象。黃銅焊接的方法：氣焊、碳弧焊、焊條電弧焊和氬弧焊。1．黃銅的氣焊（1）焊絲和焊粉：焊絲采用絲221、絲224。這些焊絲中的硅、錫、鐵元素既是脫氧劑，防止焊縫產生氣孔，又能防止和減少鋅的蒸發(fā)和燒損。</p><p> 兩種氣體同時存在比單一氣體的危害作用高15--20倍。防護措施（1）通風措施氬弧焊工作現(xiàn)場要有良好的通風裝置，以排出有害氣體及煙塵。除廠房通風外，可在焊接工作量大，焊機集中的地方，安裝幾臺軸流風機向外排風。此外，還可采用局部通風的措施將電弧周圍的有害氣體抽走，例如采用明弧排煙罩、排煙焊、輕便小風機等。（2）防護射線措施盡可能采用放射劑量極低的鈰鎢極。釷鎢極和鈰鎢極加工時，應采用密封式或抽風式砂輪磨削，操作者應配戴口罩、手套等個人防護用品，加工后要洗凈手臉。釷鎢極和鈰鎢極應放在鋁盒內保存。（3）防護高頻的措施為了防備和削弱高頻電磁場的影響，采取的措施有：1）工件良好接地，焊電纜和地線要用金屬編織線屏蔽；2）適當降低頻率；3）盡量不要使用高頻振蕩器做為穩(wěn)弧裝置，減小高頻電作用時間。（4）其它個人防護措施氬弧焊時，由于臭氧和紫外線作用強烈，宜穿戴非棉布工作服（如耐酸呢、柞絲綢等）。在容器內焊接又不能采用局部通風的情況下，可以采用送風式頭盔、送風口罩或防毒口罩等個人防護措施?！珰寤『副仨氉⒁獾膸讉€細節(jié)。。。1930年美國發(fā)明惰性氣體保護焊。焊劑為堿性系統(tǒng)的焊材可使熔填金屬獲得非常優(yōu)良的延性與韌性，但作業(yè)性遠較酸性系為差。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海H13焊絲訂購,焊絲" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265685117187/5944643.png"></div><p> 后者只預熱焊件邊緣較厚的部分。電源可采用直流正接，也可以采用交流。用交流電源焊接時，鋅的蒸發(fā)量較小。焊接參數(shù)宜采用較大的焊接電流和較快的焊接速度。厚16～20mm黃銅板的焊接參數(shù)為：焊接電流260～300A，鎢極直徑5mm，焊絲直徑～，噴嘴孔徑14～16mm，氬氣流量20～25L/min。為了減少鋅的蒸發(fā)，操作時可將填充焊絲與焊件'短接'，在填充焊絲上引弧和保持電弧，盡可能避免電弧直接作用到母材上，母材主要靠熔池金屬的傳熱來加熱熔化。焊接時，應盡可能進行單層焊，板厚小于5mm的接頭，比較好能一次焊完。焊后焊件應加熱到300～400℃進行退火處理，消除焊接應力，以防止黃銅構件在使用時破裂。4．黃銅碳弧焊黃銅碳弧焊時，根據母材的成分選用絲221、絲222、絲224等焊絲，也可用自制的黃銅焊絲施焊。焊接可以采用氣劑301等作熔劑。焊接應短弧操作，以減少鋅的蒸發(fā)和燒損。低合金鋼焊材的焊劑系統(tǒng)的開發(fā)融合了酸性系的作業(yè)性與堿性系的優(yōu)良機械性。安徽特種焊絲價格</p><p style="text-indent:25px">在相同焊接電流下藥芯焊絲的電流密度大，熔化速度快，其熔敷率約為85%-90%，生產率比焊條電弧焊高約3-5倍。上海H13焊絲訂購</p><p> 焊條烘干的目的焊條在儲存、運輸期間藥皮會吸潮，使藥皮中的水分增加。焊條使用前進行烘干的作用就是降低藥此中的含水量，其目的是：1）減少焊接過程中的飛濺，使焊接電弧能夠穩(wěn)定地燃燒。2）防止在焊縫中產生氣孔。3）防止產生在焊接某些低合金鋼時由氫引起的延遲裂紋。根據JB3223—83《焊條質量管理規(guī)程》的規(guī)定，酸性焊條烘干的溫度為75～150℃時間為1～2h。酸性焊條由于對水分產生氣孔的敏感性不大，所以烘干溫度相對要低一些。堿性焊條的烘干溫度350--400℃，時間1--2小時，烘干后放在100--150℃的保溫箱內，隨用隨取。JB4709中有推薦保溫時間和溫度(非強制性標準),不過實際使用時比較好參考焊條質保書中的溫度及時間要求！堿性焊條過高的烘干溫度也是不合適的：一是浪費能源；其次是當烘干溫度超過500℃時，藥皮中的某些成分（如CaCO3）就要發(fā)生分解，起不到應有的保護作用。焊條烘干時的注意事項焊條烘干時應注意如下事項：1）低氫型焊條在常溫下超過4h時，應重新烘干。重復烘干次數(shù)不宜超過3次。2）烘干焊條時，禁止將焊條突然放進高溫爐內，或從高溫爐中突然取出冷卻，防止焊條因驟冷驟熱而發(fā)生的藥皮開裂現(xiàn)象。3）焊條烘干時應作記錄。上海H13焊絲訂購</p><p style="text-indent:25px">簡敏精密五金制造(上海)有限公司致力于五金、工具，是一家生產型公司。公司業(yè)務涵蓋模具焊條，模具焊絲，特種焊絲，特種焊條等，價格合理，品質有保證。公司從事五金、工具多年，有著創(chuàng)新的設計、強大的技術，還有一批**的專業(yè)化的隊伍，確保為客戶提供良好的產品及服務。簡敏五金制造秉承“客戶為尊、服務為榮、創(chuàng)意為先、技術為實”的經營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1224923.html</p></div></div></div></div></div><div id="7u8gzu8" class="page-right twoColRt"><div id="skbfl3a" class="box01 margin10 clearfix"><h3><a 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