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</span>13402061820@163.com</p><p><span>電話: </span>13402061820</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.atc-tech.com</p><p><span>手機(jī): </span>021-58692399</p><p><span>地址: </span>民風(fēng)路351號(hào)1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="nvgxo7i" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="uc7xm3y" class="box"><p><p style="text-indent:25px">失效常見類型：設(shè)計(jì)不當(dāng)引起的失效(結(jié)構(gòu)設(shè)計(jì)不合理、設(shè)計(jì)硬度不足、選材不當(dāng)、材料狀態(tài)要求不合理)；材料缺陷引發(fā)的失效(疏松、偏析、皮下氣泡、縮孔、非金屬夾雜、白點(diǎn)、異金屬夾雜、表面腐蝕等)；鑄造缺陷引發(fā)的失效(縮孔與疏松、白口與反白口、球墨鑄鐵球化不良、夾渣、偏析碳化物、鑄造裂紋、石墨漂浮等)；鍛造缺陷引發(fā)的失效(過熱與過燒、鍛造裂紋、熱脆與銅脆、鍛造折疊、高溫氧化、退火不充分、鍛造白點(diǎn)、鍛造流線缺陷等)；焊接缺陷引發(fā)的失效(焊接裂紋、未焊透與未熔合、焊接預(yù)熱不當(dāng)、夾渣與氣孔、晶間腐蝕、應(yīng)力腐蝕)；.熱處理缺陷引發(fā)的失效(淬火裂紋，徐州失效分析標(biāo)準(zhǔn)有哪些、表面脫碳、滲碳/氮缺陷、回火裂紋等)；冷加工成型缺陷引發(fā)的失效(磨削缺陷，徐州失效分析標(biāo)準(zhǔn)有哪些、切削缺陷、冷鐓缺陷，徐州失效分析標(biāo)準(zhǔn)有哪些、沖/擠/拉伸成形缺陷等)。失效分析找出失效的原因，給出補(bǔ)救和預(yù)防措施。徐州失效分析標(biāo)準(zhǔn)有哪些</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="徐州失效分析標(biāo)準(zhǔn)有哪些,失效分析" src="https://tyunfile.71360.com/UploadFile/Shatcc/637394287314028716/5875570.png"></div><p style="text-indent:25px">失效情況的描述：以技術(shù)文件的形式記述失效的歷史情況。如失效的特征過程、失效件的原設(shè)計(jì)要求以及失效件的使用情況和環(huán)境。特別是有關(guān)的照片資料和多媒體資料。裸眼觀察：失效件失效后的總體形貌應(yīng)記入上述文件，而且必須進(jìn)行斷口表面或其他重要的失效特征的保護(hù)，不得造成損害。機(jī)械設(shè)計(jì)分析（應(yīng)力分析）：當(dāng)失效件是重要的承重構(gòu)件時(shí)，應(yīng)進(jìn)行強(qiáng)度分析（應(yīng)力分析），正確評(píng)估其承載能力或其他力學(xué)性能。這有助于確定失效件是否具有足夠的尺寸和合適的形狀，以滿足設(shè)計(jì)要求，從而可能找出失效的原因?；瘜W(xué)成分設(shè)計(jì)分析：據(jù)此可考察材料的力學(xué)性能、工藝性能和抗腐蝕性能。制造過程及其各工藝環(huán)節(jié)分析：錯(cuò)誤的加工工藝過程往往是導(dǎo)致失效的主要原因，如不合格的原材料、各種熱加工工藝的錯(cuò)誤和機(jī)加工、磨削的錯(cuò)誤等等。徐州失效分析標(biāo)準(zhǔn)有哪些失效分析的成果和信息是可靠性分析必不可少的物質(zhì)基礎(chǔ)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="徐州失效分析標(biāo)準(zhǔn)有哪些,失效分析" src="https://tyunfile.71360.com/UploadFile/Shatcc/637394287289214020/5831393.png"></div><p style="text-indent:25px">要收集的失效信息一般有兩類：一類是已經(jīng)確認(rèn)能反映失效事故的過程和起因的現(xiàn)象和物質(zhì)；一類是估計(jì)可能用得著的物質(zhì)和值得進(jìn)一步分析的現(xiàn)象。調(diào)查、訪問和背景資料的收集：失效裝備的工作原理及運(yùn)行技術(shù)數(shù)據(jù)和有關(guān)的規(guī)程、標(biāo)準(zhǔn)；設(shè)計(jì)的原始依據(jù)，如工作壓力、溫度、介質(zhì)、應(yīng)力狀態(tài)和應(yīng)力水平、安全系數(shù)，預(yù)計(jì)壽命等；選材的依據(jù)，如材料性能數(shù)據(jù)、焊縫系數(shù)等；材料的牌號(hào)、性能指標(biāo)、質(zhì)量保證書、供應(yīng)狀態(tài)時(shí)間等；加工、制造、裝配的技術(shù)文件，包括制造工藝的文件，工藝流程及實(shí)施記錄、檢驗(yàn)報(bào)告乃至無損檢驗(yàn)報(bào)告等；運(yùn)行記錄，包括工作壓力、溫度、介質(zhì)、時(shí)間、異常載荷及已運(yùn)行時(shí)間等；操作維修資料如操作規(guī)程、試車記錄、操作記錄、檢修記錄等。</p><p style="text-indent:25px">失效分析為制定或修改技術(shù)標(biāo)準(zhǔn)提供的依據(jù)，促進(jìn)機(jī)械產(chǎn)品質(zhì)量和安全可靠性的提供，可靠性是產(chǎn)品的關(guān)鍵性質(zhì)量指標(biāo)，而可靠性技術(shù)是質(zhì)量保證的基礎(chǔ)。可靠性分析的前提之一就是確認(rèn)產(chǎn)品是否失效、分析失效類型、失效模式及失效機(jī)理。零件失效與設(shè)計(jì)、選材、制造、檢驗(yàn)、安裝等過程均有關(guān)，通過失效分析，不斷將失效原因、預(yù)防措施等反饋到設(shè)計(jì)有關(guān)部門，進(jìn)行相應(yīng)改進(jìn)，促進(jìn)產(chǎn)品質(zhì)量和可靠性的提高。失效分析是要找出失效原因，采取有效措施，使同類失效事故不再重復(fù)發(fā)生，可避免極大的經(jīng)濟(jì)損失和人員傷亡。失效分析是一門新興發(fā)展中的學(xué)科，近年開始從**到普通企業(yè)普及。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="徐州失效分析標(biāo)準(zhǔn)有哪些,失效分析" src="https://tyunfile.71360.com/UploadFile/Shatcc/637394287293081288/6511921.png"></div><p style="text-indent:25px">失效現(xiàn)象分為顯性和隱性兩部分。顯性指的是直接可觀測(cè)的表現(xiàn)和特征,例如失效現(xiàn)場(chǎng)出現(xiàn)并可通過粗視分析觀察到的表面結(jié)構(gòu)破碎和形變,包括起火燃燒、發(fā)熱、鼓脹(產(chǎn)氣)、變形、漏液、封裝材料破損及畸變、封裝材料毛刺、虛焊或漏焊、塑料材質(zhì)熔化變形等。隱性指的是不能直接觀測(cè)而需要通過拆解、分析后得到的或者是模擬實(shí)驗(yàn)中所展現(xiàn)的表現(xiàn)和特征,例如通過實(shí)驗(yàn)室拆解檢測(cè)到的微觀失效,以及模擬電池中電學(xué)信息等。失效是失效原因的較終表現(xiàn),也是失效原因在一定時(shí)間內(nèi)疊加失效現(xiàn)象的結(jié)果。失效分析的重要任務(wù)之一是對(duì)失效原因進(jìn)行準(zhǔn)確判定。失效分析通過分析和驗(yàn)證，模擬重現(xiàn)失效的現(xiàn)象。徐州失效分析標(biāo)準(zhǔn)有哪些</p><p style="text-indent:25px">失效分析是從結(jié)果推斷失效原因的過程。徐州失效分析標(biāo)準(zhǔn)有哪些</p><p style="text-indent:25px">失效分析的過程一般是指根據(jù)失效模式和現(xiàn)象，通過分析和驗(yàn)證，模擬重現(xiàn)失效的現(xiàn)象，找出失效的原因，挖掘出失效的機(jī)理的過程。器件失效是指其功能完全或部分喪失、參數(shù)漂移，或間歇性出現(xiàn)以上情況。失效模式是產(chǎn)品失效的外在宏觀表現(xiàn)，有開路、短路、時(shí)開時(shí)斷、功能異常、參數(shù)漂移等。按照失效機(jī)理，失效可分為結(jié)構(gòu)性失效、熱失效、電失效、腐蝕失效等。結(jié)構(gòu)性失效指產(chǎn)品的結(jié)構(gòu)由于材料損傷或蛻變而造成的失效，如疲勞斷裂、磨損、變形等。主要由結(jié)構(gòu)材料特性及受到的機(jī)械應(yīng)力造成，有時(shí)候也和熱應(yīng)力和電應(yīng)力有關(guān)。徐州失效分析標(biāo)準(zhǔn)有哪些</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3108480.html</p></div></div></div></div></div><div id="8gzflgc" class="page-right twoColRt"><div id="xegcso7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="7abbxdo" 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" 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