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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>上海軋輥?zhàn)稍冸娫?軋輥</p><p><span>***更新：</span>2020-12-23 04:08:02</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="3bvh8z3" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">無(wú)錫市前洲橡膠制品有限公司</a></p><p><span>聯(lián)系人：</span>楚駿杰</p><p><span>郵箱: </span>89202885@qq.com</p><p><span>電話: </span>13921100029</p><p><span>傳真: </span>0510_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0510-83451974</p><p><span>地址: </span>前洲街道友聯(lián)村</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="exjl2ds" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="etvspwt" class="box"><p><p style="text-indent:25px">一般情況下軋輥大部分制造殘余應(yīng)力會(huì)在熱處理過(guò)程中消除，并且會(huì)隨著軋輥的存放時(shí)間延長(zhǎng)而逐漸消除，因此新軋輥存放一段時(shí)間再使用，能夠降低斷輥風(fēng)險(xiǎn)。避免較大機(jī)械應(yīng)力的方法主要是避免過(guò)冷鋼。降低組織應(yīng)力的方法是通過(guò)熱處理將輥身工作層殘余奧氏體含量控制在小于5%以下，上海軋輥?zhàn)稍冸娫?。減小熱應(yīng)力的辦法是在軋鋼過(guò)程中對(duì)軋輥進(jìn)行良好的冷卻。制造殘余應(yīng)力，機(jī)械應(yīng)力，上海軋輥?zhàn)稍冸娫?，組織應(yīng)力和熱應(yīng)力是造成高鉻鋼軋輥斷裂的主要原因，良好的熱處理，軋制條件和冷卻可以有效防治高鉻鋼軋輥斷裂，上海軋輥?zhàn)稍冸娫?。?shí)際的軋輥生產(chǎn)表明，高鉻鑄鐵軋輥有較好的抗熱裂性能。上海軋輥?zhàn)稍冸娫?/p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海軋輥?zhàn)稍冸娫?軋輥" src="https://tyunfile.71360.com/WaterMark/UploadFile/wxqzxj/637312095493271484/4391479.png"></div><p style="text-indent:25px">軋輥對(duì)組織應(yīng)力影響比較大的就是外層組織中殘余奧氏體含量。殘余奧氏體在軋制溫度，軋制壓力和水冷的交變作用下，發(fā)生奧氏體向馬氏體或貝氏體的轉(zhuǎn)變，由于奧氏體的比容小，而馬氏體的比容大，因而在組織轉(zhuǎn)變的過(guò)程中伴隨著體積的膨脹，會(huì)致使軋輥的工作層產(chǎn)生更大的壓應(yīng)力，芯部產(chǎn)生更大的拉應(yīng)力，芯部應(yīng)力一旦超過(guò)材料的強(qiáng)度，必然造成軋輥斷裂。考慮到殘余奧氏體對(duì)組織應(yīng)力的影響及熱帶連軋機(jī)軋輥的工作條件，一般軋輥的殘余奧氏體含量控制在小于5%即可保證安全使用。上海軋輥?zhàn)稍冸娫捄玫能堓?，其?qiáng)度、耐磨性和其他各種性能指標(biāo)間應(yīng)有較優(yōu)的匹配。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海軋輥?zhàn)稍冸娫?軋輥" src="https://tyunfile.71360.com/WaterMark/UploadFile/wxqzxj/637312095580703125/8969527.png"></div><p style="text-indent:25px">使用軋輥探測(cè)裝置后，能確保比較小的去除量，正常情況下只為原來(lái)的l/3～1/2，避免了不必要的損失，又確保了軋輥的磨削質(zhì)量。（2）可以減少軋機(jī)停機(jī)時(shí)間，增加軋輥使用壽命、減少?gòu)U鋼量以及由于在正常操作情況下，裂紋擴(kuò)展導(dǎo)致的產(chǎn)品質(zhì)量下降情況。應(yīng)用合理的軋輥探傷后基本能保證每根軋輥都用到保證的比較小尺寸才報(bào)廢。這樣就可以解決以前很多軋輥由于存在內(nèi)部缺陷檢查不出來(lái)，造成缺陷擴(kuò)展，比較后發(fā)生許多斷輥或其它嚴(yán)重影響生產(chǎn)的事故。2.改進(jìn)質(zhì)量使用了軋輥探傷裝置意味著可以將軋輥上的缺陷去除干凈，同時(shí)保證了軋輥機(jī)械性能的完整性和表面的光潔度。這樣就能夠保證不因這些原因使產(chǎn)品的質(zhì)量降低。</p><p style="text-indent:25px">為了減少軋輥工藝重淬消耗，提高軋輥的淬硬層深度、接觸疲勞強(qiáng)度、韌性，延長(zhǎng)其使用壽命，從20世紀(jì)70年代后期到80年代中期，國(guó)內(nèi)外開始研究使用鉻含量在3%～5%的深淬硬層冷軋工作輥鋼。3%鉻冷軋輥不需重淬，且有效淬硬層深度可達(dá)到25～30mm，5%Cr冷軋輥有效淬硬層深度則達(dá)到40mm，其耐磨性和抗事故性能也有明顯提高。在這一階段，國(guó)內(nèi)試制了9Cr3MoV鋼，國(guó)外一些制造廠也先后開發(fā)推廣了深淬硬層冷軋輥，如美國(guó)的3.25%Cr鋼和5%Cr鋼，日本的ＫａｎｔｏｃＲＰ53、ＦＨ13、ＭｎＭＣ3和ＭＣ5等。這些鋼都采用高碳高合金材料，具有良好的硬度和耐磨性，但軋輥淬硬表面脆性大，接觸疲勞壽命低，質(zhì)量不穩(wěn)定。冷軋輥輥身表面應(yīng)有高而均勻的硬度，其優(yōu)劣表現(xiàn)在輥身工作層的耐磨性，即耐粗糙性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海軋輥?zhàn)稍冸娫?軋輥" src="https://tyunfile.71360.com/WaterMark/UploadFile/wxqzxj/637318170180488281/3309511.png"></div><p style="text-indent:25px">對(duì)熱軋輥來(lái)說(shuō)，輥面不允許出現(xiàn)裂紋，表面裂紋缺陷容易造成應(yīng)力集中，加速擴(kuò)展而使軋輥失效。熱疲勞裂紋主要起因于周期**變熱應(yīng)力，嚴(yán)重情況下，裂紋擴(kuò)展可能造成輥面剝落，甚至斷輥。冷軋輥主要失效形式包括劃傷、粘輥和剝落等。冷軋輥輥身表面應(yīng)有高而均勻的硬度，其優(yōu)劣表現(xiàn)在輥身工作層的耐磨性，即耐粗糙性。熱軋工作輥進(jìn)行的熱處理一般有鍛后熱處理和調(diào)質(zhì)。鍛后熱處理的主要目的是消除鍛后應(yīng)力，細(xì)化晶粒，改善切削性能。鍛后熱處理還有擴(kuò)氫作用。軋輥的耐沖擊是對(duì)軋輥還有一些特殊要求。上海軋輥?zhàn)稍冸娫?/p><p style="text-indent:25px">冷軋輥的發(fā)展方向?qū)⑹窃谶M(jìn)一步提**度硬度和淬硬層深度的同時(shí)，保證一定的韌性。上海軋輥?zhàn)稍冸娫?/p><p style="text-indent:25px">實(shí)際的軋輥生產(chǎn)表明，高鉻鑄鐵軋輥有較好的抗熱裂性能，原因是軋輥表面生成一層致密且有韌性的鉻的氧化膜，能減少熱裂紋的數(shù)量和深度。因此，高鉻鑄鐵輥在20世紀(jì)80年代被非常普遍用于精軋前架。目前，高鉻鑄鐵復(fù)合軋輥已普遍用作熱軋帶 (鋼)連軋機(jī)，粗軋和精軋前段工作輥、寬中厚板；粗軋和精軋工作輥及小型型鋼和棒材軋機(jī)精軋輥等。高鉻鑄鐵軋輥的熱處理有兩種形式，一是低于臨界轉(zhuǎn)變溫度的亞臨界熱處理，另一種是高于臨界點(diǎn)Ａ3的高溫?zé)崽幚?。高鉻軋輥表面材料的珠光體基體，希望具有極細(xì)的片間距，并在基體上有大量彌散分布的二次碳化物，要求有盡量低的殘余奧氏體和殘余應(yīng)力，所以一般選用后一種形式的熱處理，具體為正火加回火。上海軋輥?zhàn)稍冸娫?/p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2521644.html</p></div></div></div></div></div><div id="mw2gdk7" class="page-right twoColRt"><div id="2fh84u7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="odamjaz" 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="xh83new" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img 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