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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="o9adeab" 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="vgm0yp7" 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)品關鍵詞：</span>NH45R焊絲訂購,焊絲</p><p><span>***更新：</span>2020-07-17 00:33:52</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="ikbk3lh" 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="ps8vrir" class="page-proshow02"><p class="title">詳細說明</p><div id="twxlrxd" class="box"><p><p> 焊前準備：大直徑厚壁管U形坡口的試件如下圖所示。材料為20鋼，其裝配及定位與第四章水平轉(zhuǎn)動焊條電弧焊相同。設備：焊條電弧焊的焊機為ZXG-400,埋弧焊焊機為MZ3-500,焊接調(diào)速滾輪架一臺，焊接操作架一臺。焊前清理與上述相同，焊劑、焊條須嚴格烘干。焊接參數(shù)焊接參數(shù)見下表，焊接電源極性釆用直流反接。焊接操作：打底層和填充層都采用焊條電弧焊，焊接操作與第四章第四節(jié)的大直徑管水平轉(zhuǎn)動焊相同。蓋面層采用埋弧焊，焊劑為HJ431，其顆粒度為(14~60目）。采用直流反接，NH45R焊絲訂購。焊接蓋面層時，先預調(diào)節(jié)焊接參數(shù)，調(diào)節(jié)焊接機頭使焊嘴距離焊件20~30mm，下圖中的偏移量B為20~30mm，并使焊絲對準坡口的中心線，開啟焊劑漏斗，使焊劑堆在待焊區(qū)，由于管子表面曲率較大，焊劑容易散失，為在焊接過程中更好地保護熔池，可在焊接區(qū)的前方加一如圖所示擋板或采取其它防止焊劑散失的措施。按下“啟動”按鈕，進行焊接，并耳聽和觀察焊接過程，注意焊機的電流表和電壓表及調(diào)速滾輪的轉(zhuǎn)速表的指示，隨時進行調(diào)節(jié)，NH45R焊絲訂購，NH45R焊絲訂購，以保證焊接過程的穩(wěn)定。在焊完一周后須重疊一段焊縫，***按“停止”按鈕，熄弧后關閉焊劑漏斗。焊后清理與檢驗：用錘子、鋼絲刷***焊渣，并對收弧處進行修磨。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。NH45R焊絲訂購</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="NH45R焊絲訂購,焊絲" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265664882812/4463123.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。NH45R焊絲訂購?工藝性能好，焊縫成形美觀采用氣渣聯(lián)合保護，獲得良好成形。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="NH45R焊絲訂購,焊絲" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265684541015/1545447.png"></div><p> 對電焊鉗的要求是：在任何斜度都能夾緊焊條；具有可靠的絕緣和良好的隔熱性能；電纜的橡膠包皮應伸入到鉗柄內(nèi)部，使導體不外露，起到屏護作用；輕便、易于操作。電焊鉗的規(guī)格和主要技術數(shù)據(jù)見表3—5。表3—5電焊鉗的規(guī)格和主要技術數(shù)據(jù)規(guī)格(A)額定值適用焊條直徑(mm)耐電壓性能(V／min)能連接的比較大電纜截面(mm2)負載持續(xù)率(％)工作電壓(V)工作電流(A)～32300～26160～100035(二)焊接電纜焊條電弧焊在工作中除焊接設備外，還必須有焊接電纜。焊接電纜應采用橡皮絕緣多股軟電纜，根據(jù)焊機的容量，選取適當?shù)碾娎|截面，選取時可參考表3—6。如果焊機距焊接工作點較遠，需要較長電纜時，應當加大電纜截面積使在焊接電纜上的電壓降不超過4V，以保證引弧容易及電弧燃燒穩(wěn)定。不允許用扁鐵搭接或其它辦法來代替連接焊接的電纜，以免因接觸不良而使回路上的壓降過大，造成引弧困難和焊接電弧的不穩(wěn)定。表3—6焊接電纜選用表比較大焊接電流(A)0焊接電纜截面積(mm2)25507095焊機和焊接手柄與焊接電纜的接頭必須擰緊，表面應保持清潔，以保證其良好的導電性能。不良的接觸會損耗電能，還會導致焊機過熱將接線板燒毀或使電焊鉗過熱而無法工作。。</p><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(chǎn)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(jīng)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(chǎn)生氣孔，又能防止和減少鋅的蒸發(fā)和燒損。對各種鋼材的焊接，適應性強調(diào)整焊劑的成分和比例極為方便和容易，可以提供所要求的焊縫化學成分。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="NH45R焊絲訂購,焊絲" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265688232422/703661.png"></div><p> 對本實用新型作進一步說明：結(jié)合圖1—圖4所示，一種防腐罐用焊條自動生產(chǎn)設備，由塑料擠出機a、水冷循環(huán)系統(tǒng)b、自動切斷機構(gòu)c、焊條接斗d組成，四者從前到后依次布置。水冷循環(huán)系統(tǒng)b，主要由機架1、水槽2、焊條導向桿3、水龍頭4、水管5和水泵組成。機架1上方設置有長條形的水槽2，水槽2由水平隔板分割成上層槽2a和下層槽，上層槽2a呈敞開狀態(tài)，下層槽為封閉狀態(tài)。在水槽2的兩端設置有連通槽2c。上層槽2a的前壁、后壁上對應開設有焊條過孔2b，焊條過孔的直徑為等邊三角形焊條19邊長的兩倍到三倍之間，供從塑料擠出機出來的焊條通過，同時還能確保上層槽2a的冷卻水由焊條過孔2b流入連通槽2c。限定焊條過孔的直徑與等邊三角形焊條邊長之間的關系，既能確保對焊條位置的限定，又能確保水流量。在上層槽2a內(nèi)前后間隔安裝有兩根水平設置的焊條導向桿3，但不限于兩根，對通過的焊條進行導向。焊條過孔2b、焊條導向桿3在高度上齊平，確保焊條在水冷過程中水平地順暢通過，防止焊條彎曲變形。上層槽2a的冷卻水能經(jīng)焊條過孔2b流入連通槽2c，并**終流進下層槽，再由水泵將下層槽的水泵入與水龍頭4相連的水管5。水龍頭4位于上層槽2a的前壁上方并正對焊條過孔2b。需要彎曲加工的焊接接頭，一般加工性受塑性的影響，而塑性隨著強度的增大而降低。NH45R焊絲訂購</p><p style="text-indent:25px">?焊絲的表面不涂防氧化作用的焊劑。NH45R焊絲訂購</p><p> 要做到以下要求：一是為了保證試板坡口兩側(cè)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(cè)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(xiàn)夾渣。填充層以2層為宜，較薄的焊層。NH45R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，以科技創(chuàng)新實現(xiàn)***管理的追求。公司自2016-12-05成立以來，投身于[ "模具焊條", "模具焊絲", "特種焊絲", "特種焊條" ]，是五金、工具的主力軍。公司堅持以技術創(chuàng)新為發(fā)展引擎，以客戶滿意為動力，目前擁有51~100人專業(yè)人員，年營業(yè)額達到1000-2000萬元。簡敏五金制造創(chuàng)始人龔儉生，始終關注客戶，以優(yōu)化創(chuàng)新的科技，竭誠為客戶提供比較好的服務。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/622262.html</p></div></div></div></div></div><div id="2yzlrsj" class="page-right twoColRt"><div id="38yzv3o" 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