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id="nm2sp7o" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/bbrq/637195527032470703/4505766.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="vqta2au" 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>安徽省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>北京鑫城總成廠家直供</p><p><span>***更新：</span>2020-05-23 08:28:05</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="g2mgfbi" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">蚌埠瑞強(qiáng)精密機(jī)械制造有限公司</a></p><p><span>聯(lián)系人：</span>姚瑞</p><p><span>郵箱: </span>326829053@qq.com</p><p><span>電話: </span>19805522982</p><p><span>傳真: </span>0552_4120589</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0552-2151855</p><p><span>地址: </span>安徽省蚌埠市高新開發(fā)區(qū)興華路188號(hào)</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="fk3k2li" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="xxz33vh" class="box"><p><p> 蚌埠機(jī)械制造為您介紹壓鑄生產(chǎn)模具損壞的原因以及預(yù)防措施一、造成壓鑄生產(chǎn)模具損壞的原因：在壓鑄生產(chǎn)中，模具損壞**常見的形式是裂紋、開裂。應(yīng)力是導(dǎo)致模具損壞的主要原因。熱、機(jī)械、化學(xué)、操作沖擊都是產(chǎn)生應(yīng)力之源，包括有機(jī)械應(yīng)力和熱應(yīng)力，應(yīng)力產(chǎn)生于：（一）在模具加工制造過程中1、毛坯鍛造質(zhì)量問題。有些模具只生產(chǎn)了幾百件就出現(xiàn)裂紋，而且裂紋發(fā)展很快。有可能是鍛造時(shí)只保證了外型尺寸，而鋼材中的樹枝狀晶體、夾雜碳化物、縮孔、氣泡等疏松缺點(diǎn)沿加工方法被延伸拉長(zhǎng)，形成流線，這種流線對(duì)以后的后面的淬火變形、開裂、使用過程中的脆裂、失效傾向影響極大。2、在車、銑、刨等終加工時(shí)產(chǎn)生的切削應(yīng)力，這種應(yīng)力可通過中間退火來消除。3、淬火鋼磨削時(shí)產(chǎn)生磨削應(yīng)力，磨削時(shí)產(chǎn)生摩擦熱，產(chǎn)生軟化層、脫碳層，降低了熱疲勞強(qiáng)度，容易導(dǎo)致熱裂、早期裂紋。對(duì)h13鋼在精磨后，可采取加熱至510-570℃，以厚度每25mm保溫一小時(shí)進(jìn)行消除應(yīng)力退火。4、電火花加工產(chǎn)生應(yīng)力。模具表面產(chǎn)生一層富集電極元素和電介質(zhì)元素的白亮層，又硬又脆，這一層本身會(huì)有裂紋，有應(yīng)力，北京鑫城總成廠家直供。電火花加工時(shí)應(yīng)采用高的頻率，北京鑫城總成廠家直供，使白亮層減到**小，北京鑫城總成廠家直供，必須進(jìn)行拋光方法去除，并進(jìn)行回火處理。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京鑫城總成廠家直供" src="http://tyunfile.71360.com/UploadFile/bbrq/637195527032470703/4505766.jpg"></div><p style="text-indent:25px">切削刀具材料與加工對(duì)象的化學(xué)性能匹配：切削刀具材料與加工對(duì)象的化學(xué)性能匹配問題主要是指刀具材料與工件材料化學(xué)親和性、化學(xué)反應(yīng)、擴(kuò)散和溶解等化學(xué)性能參數(shù)要相匹配。材料不同的刀具所適合加工的工件材料有所不同。 ① 各種刀具材料抗粘接溫度高低(與鋼)為：PCBN>陶瓷>硬質(zhì)合金>HSS。 ② 各種刀具材料抗氧化溫度高低為：陶瓷>PCBN>硬質(zhì)合金>金剛石>HSS。 ③各種刀具材料的擴(kuò)散強(qiáng)度大小(對(duì)鋼鐵)為：金剛石>Si3N4基陶瓷>PCBN>A1203基陶瓷。擴(kuò)散強(qiáng)度大小(對(duì)鈦)為：A1203基陶瓷>PCBN>SiC>Si3N4>金剛石。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京鑫城總成廠家直供" src="http://tyunfile.71360.com/UpLoadFile/bbrq/2019/8/637026950936333160/6370269509363331604189503.png"></div><p style="text-indent:25px">蚌埠瑞強(qiáng)精密機(jī)械制造有限公司擁有很好的服務(wù)與產(chǎn)品，不斷地受到新老用戶及業(yè)內(nèi)人士的肯定和信任。我們公司是全網(wǎng)商盟認(rèn)證會(huì)員，點(diǎn)擊頁(yè)面的商盟客服圖標(biāo)，可以直接與我們客服人員對(duì)話，愿我們今后的合作愉快！</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" 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