上海軋輥廠電話無錫市前洲橡膠制品供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="目前鑄鐵軋輥的生產(chǎn)中，普遍采用消除內(nèi)應(yīng)力退火、石墨化退火、正火和回火等工藝消除內(nèi)應(yīng)力退火，鑄鐵軋輥在澆注后的冷卻過程中，各部位通過塑性到彈性變形溫度的時(shí)間不同；在冷卻過程中軋輥發(fā)生石墨化和各種相變時(shí)其體積變化，這兩個(gè)因素使軋輥由表面至中心產(chǎn)"><meta name="keywords" content="上海軋輥廠電話,軋輥"><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 V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub 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class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/wxqzxj/637318170059296875/9225836.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="rk2q7aq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/wxqzxj/637318170059296875/9225836.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="edxvz2o" 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>上海軋輥廠電話,軋輥</p><p><span>***更新：</span>2021-01-28 01:05:37</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="3zd2crt" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">無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="qz3udwx" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="m78ubne" class="box"><p><p style="text-indent:25px">目前鑄鐵軋輥的生產(chǎn)中，普遍采用消除內(nèi)應(yīng)力退火、石墨化退火、正火和回火等工藝消除內(nèi)應(yīng)力退火，鑄鐵軋輥在澆注后的冷卻過程中，各部位通過塑性到彈性變形溫度的時(shí)間不同；在冷卻過程中軋輥發(fā)生石墨化和各種相變時(shí)其體積變化，這兩個(gè)因素使軋輥由表面至中心產(chǎn)生很大的應(yīng)力，上海軋輥廠電話。低溫退火，可在短時(shí)間內(nèi)有效的消除軋輥內(nèi)應(yīng)力。根據(jù)軋輥的材質(zhì)、尺寸和鑄造條件確定低溫退火的加熱速度、加熱溫度、保溫時(shí)間和冷卻速度等工藝參數(shù)，上海軋輥廠電話。球墨鑄鐵軋輥的組織中往往存在著過多的自由滲碳體，具有形成白口的傾向性。為了獲得較高的綜合力學(xué)性能，上海軋輥廠電話，可采取石墨化退火工藝。軋輥的工作條件是使用時(shí)又進(jìn)一步受到了各種周期應(yīng)力的作用。上海軋輥廠電話</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海軋輥廠電話,軋輥" src="https://tyunfile.71360.com/WaterMark/UploadFile/wxqzxj/637318170059296875/9225836.png"></div><p style="text-indent:25px">一般情況下軋輥大部分制造殘余應(yīng)力會(huì)在熱處理過程中消除，并且會(huì)隨著軋輥的存放時(shí)間延長而逐漸消除，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冷鋼。降低組織應(yīng)力的方法是通過熱處理將輥身工作層殘余奧氏體含量控制在小于5%以下。減小熱應(yīng)力的辦法是在軋鋼過程中對(duì)軋輥進(jìn)行良好的冷卻。制造殘余應(yīng)力，機(jī)械應(yīng)力，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。上海軋輥廠電話接觸軋件分為工作軋輥和支承輥。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海軋輥廠電話,軋輥" src="https://tyunfile.71360.com/WaterMark/UploadFile/wxqzxj/637312095575009765/4841836.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)力一旦超過材料的強(qiáng)度，必然造成軋輥斷裂?？紤]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。</p><p style="text-indent:25px">軋輥斷裂原因：1、脆性斷裂，此類軋輥斷口形狀較為平整，斷口周圍輥身表面較為齊整；?2、韌性斷裂，此類軋輥斷口形狀多呈"蘑菇頭"狀，斷口附近的輥身均成粉碎狀破碎。脆性斷裂和韌性斷裂都是因?yàn)檐堓亼?yīng)力超過芯部強(qiáng)度造成的。其產(chǎn)生原因與軋輥本身殘余應(yīng)力，軋制時(shí)機(jī)械應(yīng)力以及軋輥熱應(yīng)力有關(guān)，特別是當(dāng)輥身的表面和芯部的溫差大時(shí)更容易產(chǎn)生。這種溫差可能由不良的輥冷卻，冷卻中斷或在新的軋制周期開始時(shí)軋輥表面過熱引起。軋輥的這種表面和芯部間的巨大溫差引起較大的熱應(yīng)力，當(dāng)較大的熱應(yīng)力，機(jī)械應(yīng)力以及軋輥的殘余應(yīng)力超過軋輥的芯部強(qiáng)度時(shí)引起斷輥。傳統(tǒng)的軋輥選材及其熱處理工藝，同時(shí)，對(duì)軋輥材料及其熱處理工藝的發(fā)展進(jìn)行了展望。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海軋輥廠電話,軋輥" src="https://tyunfile.71360.com/WaterMark/UploadFile/wxqzxj/637318170193769531/3270744.png"></div><p style="text-indent:25px">軋輥表面淬火方法按加熱方法可分整體快速加熱淬火法和連續(xù)感應(yīng)加熱淬火法，目前后者在生產(chǎn)實(shí)踐中應(yīng)用更廣。在連續(xù)式感應(yīng)加熱淬火工藝方法中雙頻感應(yīng)淬火很有特色，它使用兩種不同頻率的感應(yīng)器匹配進(jìn)行感應(yīng)加熱，在輥面溫度控制和加熱層溫度分布方面的具有明顯的優(yōu)勢(shì)。典型的雙頻淬火裝備以電流透入深度較大的工頻感應(yīng)器作為主感應(yīng)器，實(shí)現(xiàn)深層加熱，均熱一段時(shí)間后，再使用一個(gè)中頻感應(yīng)器來得到較深的經(jīng)過等溫的奧氏體化層,淬后獲得所需的淬硬層深度。中頻電源以250Hz為佳，也有使用500、1000、1200和2500Hz。軋輥按成形方法分為鑄造軋輥和鍛造軋輥，按工藝方法分為整體軋輥、冶金復(fù)合軋輥和組合軋輥。上海軋輥廠電話</p><p style="text-indent:25px">軋輥的耐沖擊是對(duì)軋輥還有一些特殊要求。上海軋輥廠電話</p><p style="text-indent:25px">軋輥的工作條件：使用時(shí)又進(jìn)一步受到了各種周期應(yīng)力的作用，決定于三個(gè)因素：①軋機(jī)、軋材和軋制條件，以及軋輥的合理選擇；②軋輥材料及其制造質(zhì)量；③軋輥的使用和維護(hù)制度。軋輥品種。鑄鐵軋輥：一般按制造工藝分類：工作層因金屬型的激冷作用呈白口組織（基體+碳化物）的軋輥稱冷硬鑄鐵軋輥；用上述方法，但適當(dāng)提高鐵水碳當(dāng)量而得到麻口組織（基體+碳化物+石墨）的軋輥稱無限冷硬鑄鐵軋輥。采用襯砂金屬型并繼續(xù)提高碳當(dāng)量可得粗麻口組織的軋輥，稱半冷硬鑄鐵軋輥。所有上述品種的組織中凡石墨呈球狀的，稱球墨鑄鐵軋輥；復(fù)合澆鑄的軋輥加“復(fù)合”一詞。上海軋輥廠電話</p></p><br /><p>文章來源地址: 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