昆山特種焊絲歡迎來電簡敏精密五金制造供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content=" 焊條烘干的目的焊條在儲存，昆山特種焊絲、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"><meta name="keywords" content="昆山特種焊絲"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var 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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="m2ycew4" 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="qa2suyk" 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(chǎn)品關(guān)鍵詞：</span>昆山特種焊絲</p><p><span>***更新：</span>2020-06-26 06:22:32</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="em0sosq" 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(wǎng)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="cgkyau2" class="page-proshow02"><p class="title">詳細說明</p><div id="g2uyuoa" class="box"><p><p> 焊條烘干的目的焊條在儲存，昆山特種焊絲、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(chǎn)生氣孔。3）防止產(chǎn)生在焊接某些低合金鋼時由氫引起的延遲裂紋。根據(jù)JB3223—83《焊條質(zhì)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(chǎn)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(nèi)，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(zhì)保書中的溫度及時間要求，昆山特種焊絲！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，昆山特種焊絲，起不到應(yīng)有的保護作用。焊條烘干時的注意事項焊條烘干時應(yīng)注意如下事項：1）低氫型焊條在常溫下超過4h時，應(yīng)重新烘干。重復(fù)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(nèi)，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(yīng)作記錄。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆山特種焊絲" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265669218750/3372736.png"></div><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(yīng)采用密封式或抽風式砂輪磨削，操作者應(yīng)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(yīng)放在鋁盒內(nèi)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(nèi)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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="昆山特種焊絲" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265685117187/5944643.png"></div><p> 去渣容易，不易產(chǎn)生氣孔和夾渣。但藥皮氧化性強使合金元素燒損大,機械性能（沖擊韌性）比較低。酸性焊條一般均可用交直流電源。典型的酸性焊條是J422。堿性焊條焊接的焊縫機械性能良好，特別是沖擊韌性比較高，主要用于重要結(jié)構(gòu)的焊接。氟化物粉塵有害，應(yīng)加強現(xiàn)場的通風排氣，以改善勞動條件。典型的堿性焊條有J507。按焊條藥皮主要成分分類當藥皮中含有30％以上的二氧化鈦及20％以下的鈣、鎂的碳酸鹽時，就稱為鈦鈣型。結(jié)構(gòu)鋼焊條牌號J422，中“J”表示結(jié)構(gòu)鋼焊條,按用途分***、二位數(shù)字“42”表示焊縫金屬的抗拉強度等級（用MPa值的1/10表示），末位數(shù)字“2”表示藥皮類型及焊接電源的種類奧氏體鉻鎳不銹鋼焊條牌號A132中“A”表示奧氏體不銹鋼焊條；***、第二位數(shù)字表示焊縫金屬主要化學(xué)成分組成。末位數(shù)字表示藥皮類型和焊接電源種類焊條型號：是以焊條國家標準為依據(jù)、反映焊條主要特性的一種表示方法。焊條型號根據(jù)焊縫金屬的力學(xué)性能、藥皮類型、焊接位置和焊接電流種類劃分。碳鋼焊條型號E4315中“E”表示焊條；前兩位數(shù)字表示熔敷金屬抗拉強度的最小值，單位為MPa值的1/10；第三位數(shù)字表示焊條焊接位置，“0”及“1”表示用于全位置焊接（平、立、仰、橫）。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/395506.html</p></div></div></div></div></div><div id="yasuse4" class="page-right twoColRt"><div id="eoosgqk" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="uwa4kqy" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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