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42CrMoVNb細(xì)晶高強(qiáng)鋼的疲勞行為
| 42CrMoVNb細(xì)晶高強(qiáng)鋼的疲勞行為FATIGUE BEHAVIOR OF FINE--GRAINED HIGH STRENGTH STEEL 42CrMoVNb 研究了不同熱處理制度下得到的3種晶粒尺寸的42CrMoVNb細(xì)晶高強(qiáng)鋼的疲勞性能. 結(jié)果表明, 它們的光滑疲勞試樣S--N曲線在10 6---10 7周期范圍內(nèi)無平臺(tái)出現(xiàn), 疲勞極限消失. SEM斷口觀察表明, 光 滑試樣疲勞裂紋起源位置與壽命長(zhǎng)短密切相關(guān), 測(cè)量了長(zhǎng)壽命試樣疲勞斷裂源夾雜物的位置及尺寸. 通過對(duì)實(shí)驗(yàn)數(shù)據(jù)的初步分析, 給出了夾雜物 及奧氏體晶粒尺寸應(yīng)控制的水平. The fatigue properties of high strength steel 42CrMoVNb with three fine grain sizes produced by different heat treatment procedures were studied. The experimental results illustrate that at 10 6---10 7 cycles regime, there is no horizontal asymptote in fatigue S--N curves for smooth specimens, so the conventional fatigue limit disappears. SEM shows the fatigue crack initiation sites in smooth specimens are related closely to fatigue life, and most of the sites are at inclusions. From analyzing the experimental data, the critical size of inclusion and the most appropriate size of prior austenite, which should be controlled in practical production, are obtained. 全文下載：http://pan.baidu.com/s/1ge1dXDL 作為值得信賴的合作伙伴和高品質(zhì)金屬合金的半成品供應(yīng)商，艾荔艾擁有完善的服務(wù)體系和專業(yè)的團(tuán)隊(duì)。在同客戶交易的過程中，我們力求根據(jù)不同的應(yīng)用需求將我們的產(chǎn)品做到精益求精。針對(duì)當(dāng)前和未來的市場(chǎng)需求，艾荔艾致力于為客戶提供最佳的金屬材料解決方案。 AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges. 獲取更多我們供應(yīng)的合金和服務(wù)信息，請(qǐng)致電086-021-67660801或發(fā)電子郵件[email protected]聯(lián)系我們，您也可以通過微博，微信，領(lǐng)英，XING，臉書和推特與我們互動(dòng)。 For more information on the alloys and services that we supply,?call us?at 086-021-67660801 or email us at [email protected]. You can also get in touch on social media, we are constantly active on?Weibo,?Weixin,?LinkedIn,?XING, Facebook?and?Twitter. |