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class="proBig"><div id="dc7zlfr" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UpLoadFile/lianzha/2019/7/636991441772757349/6369914417727573497553185.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="vo4ofea" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UpLoadFile/lianzha/2019/7/636991441772757349/6369914417727573497553185.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="z3qgy3f" 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>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>福建庫(kù)存Q355B低合金規(guī)格齊全</p><p><span>***更新：</span>2020-06-08 22:07:57</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="ihwsjyo" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海聯(lián)軋實(shí)業(yè)有限公司</a></p><p><span>聯(lián)系人：</span>胡榮強(qiáng)</p><p><span>郵箱: </span>592132109@qq.com</p><p><span>電話: </span>13818812296</p><p><span>傳真: </span>021_66796039</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-33717959</p><p><span>地址: </span>上海市寶山區(qū)聯(lián)水路168號(hào)3幢3層</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="eds82dn" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="gpragd8" class="box"><p><p style="text-indent:25px">目前中國(guó)礦山機(jī)械行業(yè)的科技基礎(chǔ)較薄弱，**開放以來(lái)，礦山機(jī)械行業(yè)以市場(chǎng)換技術(shù)作為提高產(chǎn)品技術(shù)水平的主要途徑，同時(shí)還要面對(duì)國(guó)外競(jìng)爭(zhēng)者在中國(guó)投資辦廠的嚴(yán)峻形勢(shì)。中國(guó)礦山機(jī)械行業(yè)存在兩個(gè)方面的問題:一是礦山機(jī)械行業(yè)企業(yè)綜合實(shí)力不強(qiáng)，大多數(shù)企業(yè)在科研、新產(chǎn)品開發(fā)、技術(shù)改造和企業(yè)管理等方面的精力和資金投入都處于停頓狀態(tài)。國(guó)內(nèi)礦山機(jī)械產(chǎn)品品種尤其是中國(guó)建設(shè)急需的關(guān)鍵設(shè)備不能滿足要求，而且存在產(chǎn)品技術(shù)含量低、產(chǎn)品附加值不高、產(chǎn)品質(zhì)量不穩(wěn)定、全員勞動(dòng)生產(chǎn)率低等問題。造成中國(guó)礦山機(jī)械制造企業(yè)的產(chǎn)值增長(zhǎng)率與利潤(rùn)增長(zhǎng)率極不相稱。二是產(chǎn)品品種、技術(shù)、質(zhì)量、服務(wù)等方面存在問題，導(dǎo)致國(guó)內(nèi)礦山機(jī)械行業(yè)對(duì)礦山的實(shí)際貢獻(xiàn)率低。中國(guó)礦山機(jī)械企業(yè) 就應(yīng)該對(duì)傳統(tǒng)礦山機(jī)械質(zhì)量差、效率低、高耗能、污染大等一系列的問題做分析，研制出的新型礦山機(jī)械，自主創(chuàng)新，克服種種困難，福建庫(kù)存Q355B低合金規(guī)格齊全，為中國(guó)礦山機(jī)械做貢獻(xiàn)! Q345B材料的優(yōu)勢(shì)：由于Q345B低合金材料綜合性能好，福建庫(kù)存Q355B低合金規(guī)格齊全，福建庫(kù)存Q355B低合金規(guī)格齊全，低溫性能好，冷沖壓性能和焊接性能以及可切削性能好。所以一直以來(lái)被廣大礦山企業(yè)大面積使用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建庫(kù)存Q355B低合金規(guī)格齊全" src="http://tyunfile.71360.com/WaterMark/UpLoadFile/lianzha/2019/7/636991441772757349/6369914417727573497553185.jpg"></div><p style="text-indent:25px">Q345B鋼板產(chǎn)品簡(jiǎn)介：Q345A(GB/T 1591-1994) ω/% 性能及應(yīng)用：類同于Q235的命名方法。Q345a，Q345b，Q345c，Q345d，Q345e。這是等級(jí)的區(qū)分，所**的，主要是沖擊的溫度有所不同而已！Q345a級(jí)，是不做沖擊；Q345b級(jí)，是20度常溫沖擊；Q345c級(jí)，是0度沖擊；Q345d級(jí)，是－20度沖擊；Q345e級(jí)，是－40度沖擊。在不同的沖擊溫度，沖擊的數(shù)值也有所不同。在板材里，屬低合金系列。在低合金的材質(zhì)里，此種材質(zhì)為相當(dāng)普通的。Q345過去的一種叫法為：16mn。 Q345B鋼板產(chǎn)品的力學(xué)性能屈服強(qiáng)度：≤16mm：大于345，16-40mm：大于335，40-63mm：大于325，63—80mm：大于315， 80—100m：大于305，100—150mm：大于285，150—200mm：大于275。抗拉強(qiáng)度：450—630。伸長(zhǎng)率：大于17。沖擊試驗(yàn)：試驗(yàn)溫度：20℃：大于34。一,因素。所以中華人民共和國(guó)國(guó)內(nèi)質(zhì)量監(jiān)督檢驗(yàn)檢疫總局和中國(guó)國(guó)家標(biāo)準(zhǔn)化管理委員會(huì)聯(lián)合發(fā)布實(shí)施的低合金高強(qiáng)度結(jié)構(gòu)鋼標(biāo)準(zhǔn)，取消Mn含量區(qū)間的限定，只規(guī)定比較大值。對(duì)于Q345鋼材的檢測(cè)，一方面是鋼材的元素含量是否達(dá)到國(guó)標(biāo)要求，相當(dāng)重要的一方面是通過專業(yè)機(jī)構(gòu)檢測(cè)鋼材的機(jī)械性能（屈服強(qiáng)度、拉伸試驗(yàn)）是否達(dá)到標(biāo)準(zhǔn)。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建庫(kù)存Q355B低合金規(guī)格齊全" src="http://tyunfile.71360.com/WaterMark/UpLoadFile/lianzha/2019/7/636991439819634016/6369914398196340166201663.png"></div><p style="text-indent:25px">低溫壓力容器推薦材料Q345B低合金設(shè)計(jì)溫度為-20℃以下的壓力容器;液化乙烯、液化天然氣、液氮和液氫等的儲(chǔ)存和運(yùn)輸用容器均屬低溫壓力容器。一般壓力容器常用的鐵素體鋼在溫度降低到某一溫度時(shí),鋼的韌性將急劇下降，而顯得很脆,通常稱這一溫度為脆性轉(zhuǎn)變溫度。壓力容器在低于轉(zhuǎn)變溫度的條件下使用時(shí)，容器中如存在因缺點(diǎn)、殘余應(yīng)力、應(yīng)力集中等因素引起的較高局部應(yīng)力，容器就可能在沒有出現(xiàn)明顯塑性變形的情況下發(fā)生脆性破裂而釀成災(zāi)難性事故。對(duì)于低溫壓力容器首先要選用合適的材料，這些材料在使用溫度下應(yīng)具有良好的韌性。經(jīng)細(xì)化晶粒處理的低合金鋼可用到-45℃，2.5%鎳鋼可用到-60℃，3.5%鎳鋼可用到-104℃,9%鎳鋼可用到-196℃。低于-196℃時(shí)可選用奧氏體不銹鋼和鋁合金等。為了避免在低溫壓力容器上產(chǎn)生過高的局部應(yīng)力，在設(shè)計(jì)容器時(shí)應(yīng)避免有過高的應(yīng)力集中和附加應(yīng)力;在制造容器時(shí)應(yīng)嚴(yán)格檢驗(yàn)，以防止容器中存在危險(xiǎn)的缺點(diǎn)。對(duì)于因焊接而引起的過大殘余應(yīng)力，應(yīng)在焊后進(jìn)行避免焊接殘余應(yīng)力處理。由于Q345B低合金材料綜合性能好，低溫性能好，冷沖壓性能和焊接性能以及可切削性能好。所以一直以來(lái)被廣大低溫壓力容器制作企業(yè)大量使用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建庫(kù)存Q355B低合金規(guī)格齊全" src="http://tyunfile.71360.com/WaterMark/UpLoadFile/lianzha/2019/7/636991440167772643/6369914401677726436431799.png"></div></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/192920.html</p></div></div></div></div></div><div id="vxe3cic" class="page-right twoColRt"><div id="2aocjvh" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="nbxjgce" 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" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="xw73lsu" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" 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