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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="dcuxdni" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/lmfmyj/637249885633291016/2492239.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="yadfpob" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>浙江省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>金華粉末冶金企業(yè)</p><p><span>***更新：</span>2020-05-29 08:21:29</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="zxhc66g" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">寧波聯(lián)銘粉末冶金有限公司</a></p><p><span>聯(lián)系人：</span>樂雪君</p><p><span>郵箱: </span>286178122@qq.com</p><p><span>電話: </span>13484278563</p><p><span>傳真: </span>0574_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>0574-13484278</p><p><span>地址: </span>蛟川街道鎮(zhèn)寧東路685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="1lzuwgx" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="fo6hjeo" class="box"><p><p> 鐵基粉末冶金制品已經(jīng)被業(yè)界公認(rèn)為是一種可持續(xù)的制造技術(shù)。粉末冶金在在一般情況下是在燒結(jié)后就制成了零件成品，即可進(jìn)行包裝、交貨。大多數(shù)情況下，加工粉末冶金產(chǎn)品所使用的切削油是微不足道的，其冷卻水等污染源釋放的有危害污染物質(zhì)也是很少的。和其它制造工藝相比較，粉末冶金公司排名粉末冶金零件產(chǎn)業(yè)對環(huán)境幾乎沒有危害。粉末冶金為金屬粉末或其混合物為原料，金華粉末冶金企業(yè)，金華粉末冶金企業(yè)，經(jīng)過成形和燒結(jié)，制造各種類型制品的工藝，金華粉末冶金企業(yè)。由于粉末冶金技術(shù)的優(yōu)點，它已成為解決新材料問題的鑰匙，在新材料的發(fā)展中起著舉足輕重的作用。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金華粉末冶金企業(yè)" src="https://tyunfile.71360.com/UploadFile/lmfmyj/637249885633291016/2492239.jpg"></div><p> 粉末冶金材料的熱處理工藝 </p> <p> 粉末冶金材料的熱處理工藝您了解多少呢?現(xiàn)在粉末冶金材料被應(yīng)用得越來越寬泛，它們在取代低密度、低硬度和強度的鑄鐵材料方面已經(jīng)具有明顯優(yōu)勢。粉末冶金材料的熱處理有淬火、化學(xué)熱處理、蒸汽處理和特殊熱處理幾種形式，下面魯州粉末冶金制品有限公司為大家著重介紹淬火熱處理和化學(xué)熱處理兩種。 </p> <p> 淬火熱處理工藝 </p> <p> 粉末冶金材料由于孔隙的存在，在傳熱速度方面要低于致密材料，因此在淬火時，淬透性相對較差。另外淬火時，粉末材料的燒結(jié)密度和材料的導(dǎo)熱性是成正比關(guān)系的;粉末冶金材料因為燒結(jié)工藝與致密材料的差異，內(nèi)部均勻性要優(yōu)于致密材料，但存在較小的微觀區(qū)域的不均勻性，所以，完全奧氏體化時間比相應(yīng)鍛件長50%，在添加合金元素時，完全奧氏體化溫度會更高、時間會更長。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金華粉末冶金企業(yè)" src="https://tyunfile.71360.com/UploadFile/lmfmyj/637249885740498047/8933814.jpg"></div><p> 碳分解出后被金屬表面吸收并逐漸向內(nèi)部擴散，在材料的表面獲得足夠的碳濃度后再進(jìn)行淬火和回火處理，會提高粉末冶金材料的表面硬度和淬硬深度。由于粉末冶金材料的孔隙存在，使得活性炭原子從表面滲入內(nèi)部，完成化學(xué)熱處理的過程。但是，材料密度越高，孔隙效應(yīng)就越弱，化學(xué)熱處理的效果就越不明顯，因此，要采用碳勢較高的還原性氣氛保護(hù)。根據(jù)粉末冶金材料的孔隙特點，其加熱和冷卻速度要低于致密材料，所以加熱時要延長保溫時間，提高加熱溫度。 </p> <p> 粉末冶金材料的化學(xué)熱處理包括滲碳、滲氮、滲硫和多元共滲等幾種形式，在化學(xué)熱處理中，淬硬深度主要與材料的密度有關(guān)。因此，可以在熱處理工藝上采取相應(yīng)措施，比如：滲碳時，在材料密度大于7g/cm3時適當(dāng)延長時間。通過化學(xué)熱處理可提高材料的耐磨性，粉末冶金材料的不均勻奧氏體滲碳工藝，使處理后的材料滲層表面的含碳量可達(dá)2%以上，碳化物均勻分布于滲層表面，能夠很好地提高硬度和耐磨性能。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金華粉末冶金企業(yè)" src="https://tyunfile.71360.com/UploadFile/lmfmyj/637249885632832031/5761550.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/76454.html</p></div></div></div></div></div><div id="pvil6z9" class="page-right twoColRt"><div id="gth9hni" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="qwjed9z" 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配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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