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href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_yjkc/">冶金礦產(chǎn)</a>?<a href="http://www.cdcfah.com/cp/second-yjkc_ysjshj/">有色金屬合金</a>?<a href="http://www.cdcfah.com/cp/third-ysjshj_tonghejin/">銅合金</a>?福建電氣設(shè)備**紫銅排可量尺定做誠信經(jīng)營無錫博納斯特鋼供應(yīng)</p><div id="8bsfho3" class="leftbox clearfix"><h1>福建電氣設(shè)備**紫銅排可量尺定做誠信經(jīng)營無錫博納斯特鋼供應(yīng)</h1><div id="jdp32ol" class="proBig"><div id="3riprdz" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/wxbnstg/637123665483212890/6367795.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3g27xe7" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/wxbnstg/637123665483212890/6367795.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="7qp3zqc" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>福建電氣設(shè)備**紫銅排可量尺定做</p><p><span>***更新：</span>2020-06-25 17:33:00</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="xro3zrt" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">無錫博納斯特鋼有限公司</a></p><p><span>聯(lián)系人：</span>姜帥</p><p><span>郵箱: </span></p><p><span>電話: </span>18961869366</p><p><span>傳真: </span>0510_83261806</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0510-83261968</p><p><span>地址: </span>惠山區(qū)惠澄大道77號</p><p>[當(dāng)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="qkryfrt" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="xmt77d7" class="box"><p><p> 鍍錫銅排變黃變黑的原因 </p> <p> 鍍錫銅排變色：銅排中鍍錫銅排有熱鍍錫和電鍍錫，這兩種鍍錫都會存在有銅材表面發(fā)黑的現(xiàn)象，福建電氣設(shè)備**紫銅排可量尺定做，如果剛鍍錫完成后沒有出現(xiàn)有變色的現(xiàn)象，而過了幾天就出現(xiàn)了發(fā)黑變色的現(xiàn)象，有幾種可能存在，第1一，是t2銅排的存放空間的環(huán)境，如果環(huán)境惡劣，會直接導(dǎo)致鍍錫層發(fā)黑的；二，錫本身的純度不夠，福建電氣設(shè)備**紫銅排可量尺定做，雜質(zhì)過多也會加速氧化發(fā)黑的進(jìn)程；三，鍍錫銅排層有污染物存在，包括沒帶手套的手直接接觸的表面等，鍍錫銅排所變黃，福建電氣設(shè)備**紫銅排可量尺定做，說明已經(jīng)氧化。如果是線路板上的銅泊氧化。說明您的產(chǎn)品在鍍錫時(shí)用到的助焊劑沒有起到上錫后保護(hù)鉛泊表面的作用。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建電氣設(shè)備**紫銅排可量尺定做" src="http://tyunfile.71360.com/UploadFile/wxbnstg/637123665483212890/6367795.jpg"></div><p style="text-indent:25px"> 普通紫銅排在含氫或一1氧化碳的還原性氣氛中加熱時(shí)，氫或一1氧化碳易與晶界的氧化亞銅(Cu2O)作用，產(chǎn)生高壓水蒸氣或二氧化碳?xì)怏w，可使銅破裂。這種現(xiàn)象常稱為銅的“氫病”。氧對銅的焊接性有害。鉍或鉛與銅生成低熔點(diǎn)共晶，使銅產(chǎn)生熱脆；而脆性的鉍呈薄膜狀分布在晶界時(shí)，又使銅產(chǎn)生冷脆。磷能***降低銅的導(dǎo)電性,但可提高銅液的流動性, 改善焊接性。適量的鉛、碲、硫等能改善可切削性。紫銅退火板材的室溫抗拉強(qiáng)度為22～25公斤力／毫米2,伸長率為45～50％，布氏硬度（HB）為 35～45。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建電氣設(shè)備**紫銅排可量尺定做" src="http://tyunfile.71360.com/UploadFile/wxbnstg/637123665476044921/2297819.jpg"></div><p> 無氧銅是不含氧也不含任何脫氧劑殘留物的純銅。但實(shí)際上還是含有非常微量氧和一些雜質(zhì)。按標(biāo)準(zhǔn)規(guī)定，氧的含量不大于0.03%，雜質(zhì)總含量不大于0.05%，銅的純度大于99.95%。 </p> <p> <br /> </p> <p> 根據(jù)含氧量和雜質(zhì)含量，無氧銅又分為一號和二號無氧銅。一號無氧銅純度達(dá)到99.97%，氧含量不大于0.003%，雜質(zhì)總含量不大于0.03%;二號無氧銅純度達(dá)到99.95%，氧含量不大于0.003%，雜質(zhì)總含量不大于0.05%。 </p> <p> <br /> </p> <p> 無氧銅無氫脆現(xiàn)象，導(dǎo)電率高，加工性能和焊接性能、耐蝕性能和低溫性能均好。 </p> <p> <br /> </p> <p> <br /> </p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/389382.html</p></div></div></div></div></div><div id="rah33d7" class="page-right twoColRt"><div id="q2o22qs" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bl3iz3z" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" 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