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src="https://tyunfile.71360.com/UploadFile/shbairuo/637255234829218750/8598307.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="bkz2eln" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbairuo/637255234829218750/8598307.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="scj8fhj" 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>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>浙江直銷應(yīng)力腐蝕試驗機企業(yè)</p><p><span>***更新：</span>2020-05-26 22:47:40</p><p><span id="click" >瀏覽次數(shù)：7次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="wgdk7n3" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海百若試驗儀器有限公司</a></p><p><span>聯(lián)系人：</span>孫富榮</p><p><span>郵箱: </span>xinxi@bairoe.cn</p><p><span>電話: </span>13701715948</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>021-38181265</p><p><span>地址: </span>浦東新區(qū)川沙新鎮(zhèn)鹿達路81號1號樓、2號樓</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="8dogizg" class="page-proshow02"><p class="title">詳細說明</p><div id="e2ugtv2" class="box"><p><p> 就可以根據(jù)延伸率等參數(shù)的不同和斷口形貌及二次裂紋的特征來評定特定材料—介質(zhì)體系對應(yīng)力腐蝕破裂的敏感性。與前兩種方法相比,慢應(yīng)變速率法具有較大的優(yōu)越性。首先,慢應(yīng)變速率法對應(yīng)力腐蝕開裂有較高的靈敏性。其次，用慢應(yīng)變速率法可以得到很多有用的信息,可定量地判斷應(yīng)力腐蝕破裂敏感性的大小。慢應(yīng)變速率法的缺點是設(shè)備復(fù)雜，確定應(yīng)變速率值的影響因素很多，對材料過分苛刻。此外慢應(yīng)變速率法不能提供更多的信息,在比較腐蝕環(huán)境和空氣中的拉伸曲線時，不容易比較裂紋的潛伏期和擴展期，很難估計裂紋擴展速度。應(yīng)力腐蝕斷裂力學試驗斷裂力學試驗方法采用帶有預(yù)制裂紋的試樣，通常是在光滑試樣上用機械方法加工一個切口，然后用疲勞載荷在切口根部產(chǎn)生裂紋，也可用機械突入法等方法產(chǎn)生裂紋，浙江直銷應(yīng)力腐蝕試驗機企業(yè)。然后對試樣加一定載荷并置入環(huán)境中進行試驗。采用預(yù)制裂紋試樣，把線彈性斷裂力學應(yīng)用于應(yīng)力腐蝕試驗，可以確定金屬材料在特定介質(zhì)中的臨界應(yīng)力場強度因子KISCC和裂紋擴展速率da/dt，確定構(gòu)件中可允許的比較大缺點尺寸及構(gòu)件的壽命，浙江直銷應(yīng)力腐蝕試驗機企業(yè)。斷裂力學方法的優(yōu)點是，浙江直銷應(yīng)力腐蝕試驗機企業(yè)，試驗簡單、試驗周期較短；通過KI可以準確地確定裂紋前列的應(yīng)力狀態(tài)；不同形狀試樣的試驗結(jié)果具有可比性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江直銷應(yīng)力腐蝕試驗機企業(yè)" src="https://tyunfile.71360.com/UploadFile/shbairuo/637255234829218750/8598307.png"></div><p> 拉力機也稱拉力試驗機，電腦式拉力機可測試各種材料及成品、半成品的物理性能，選購各種不同的夾具可做抗拉、抗壓、持拉、持壓、抗彎、撕裂、剝離、黏著力、剪力等試驗。1.拉力機橫梁出現(xiàn)失控情況的處理：在電刷更換之后，把電機安裝歸位。試機時，出現(xiàn)橫梁失控的情況。測量橫梁的反饋信號為零。分析原因是：在電機安裝歸位時，反饋測速裝置沒有與齒輪完全嚙合，導(dǎo)致無反饋信號，使橫梁失控。重新安裝后，拉力試驗機恢復(fù)正常。2.拉力機出現(xiàn)保險熔斷情況處理：在更換新的功率放大器時，出現(xiàn)功率放大器中主保險熔斷的情況。分析原因是：在選擇橫梁高速移動時，出現(xiàn)功率放大器中主保險熔斷的情況。分析原因：在選擇橫梁高速移動時，拉力試驗機會自鎖情況，橫梁不能移動。但這時并沒有切斷供給拉力試驗機的電源，由于功率放大器沒有正常的輸出，但此時又一直向功率放大器的電源部分供電，使其電源部分中的濾波和穩(wěn)壓電容一直充電，且無法放電。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江直銷應(yīng)力腐蝕試驗機企業(yè)" src="https://tyunfile.71360.com/UploadFile/shbairuo/637255234708886719/9660665.png"></div><p> 7.試樣斷裂時的伸長率（扯斷伸長率）。二、根據(jù)以上所測參數(shù)的要求。橡膠拉伸試驗過程中需要**的數(shù)據(jù)有兩項：拉力力值和標距變化量。所以用于測試橡膠拉伸性能的橡膠拉力試驗機必須滿足以下四個要求：1.大行程。由于橡膠在拉伸時變形量很大，尤其是乳膠制品，伸長率有可能高達1000%以上。所以在橡膠試樣斷裂之前，必須保證夾持器有足夠的行程。2.高精度及高頻率的數(shù)據(jù)采集。拉伸橡膠不需要很大的力，拉力測量范圍不需要很大，所以需要力值的精度較高。一般要求測力儀，拉力機，硫化儀能夠求取小數(shù)點后兩位以上精度的力值。此外由于檢測橡膠拉伸性能需要拉伸過程中的數(shù)個拉力值，而拉伸試驗又不可重復(fù)，所以即時準確記錄每個試驗段的拉力力值對于試驗成敗起著非常重要的作用。3.準確的標距測量和記錄裝置（如圖）。試樣標距的測量是計算橡膠伸長率的重要數(shù)據(jù)，所以橡膠拉伸試驗中拉力試驗機必須準確地測量試樣的應(yīng)變量，并即時地記錄下來。4.可以準確描述應(yīng)力－應(yīng)變曲線的裝置。拉伸試樣中的拉力值和標距之間有著密切的聯(lián)系，例如：試樣的定伸應(yīng)力需要測量試樣拉伸到給定伸長率的力值，而定應(yīng)力則需要測量試樣拉伸到給定應(yīng)力的標距。試驗完成后。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江直銷應(yīng)力腐蝕試驗機企業(yè)" src="https://tyunfile.71360.com/UploadFile/shbairuo/637255234875585938/6863961.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/49438.html</p></div></div></div></div></div><div id="lpr3ceq" class="page-right twoColRt"><div id="3zgdamj" class="box01 margin10 clearfix"><h3><a 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