亞穩(wěn)奧氏體調控對低溫海工用鋼力學性能的影響與機理研究
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-01-19
利用 EBSD, HRTEM 與熱膨脹儀等實驗手段對低碳中錳鋼在淬火+回火 (QT) 與淬火+片狀淬火+回火 (QLT) 工藝下的奧氏體形貌與相變過程進行了對比分析.
亞穩(wěn)奧氏體調控對低溫海工用鋼力學性能的影響與機理研究EFFECT OF METASTABLE AUSTENITE ON MECHANICAL PROPERTY AND?MECHANISM IN CRYOGENIC STEEL APPLIED IN OCEANEERING利用 EBSD, HRTEM 與熱膨脹儀等實驗手段對低碳中錳鋼在淬火+回火 (QT) 與淬火+片狀淬火+回火 (QLT) 工藝下的奧氏體形貌與相變過程進行了對比分析. 結果表明, QT 與 QLT 工藝下所生成的回轉奧氏體形貌、尺寸、位置以及由此導致的奧氏體穩(wěn)定性差異是造成實驗鋼力學性能特別是低溫沖擊韌性巨大差異的最主要原因. 熱力學與動力學分析表明, 由于 QLT 工藝在淬火+片狀淬火 (QL) 階段完成了 C和 Mn 元素的第一次配分,?因而相比于 QT 熱處理工藝, QLT 工藝下回轉奧氏體在生成速率顯著提高的同時其生長模型也由一維雙向增厚模式演變成一維單向增厚模式.?
With the development of marine resources and its emerging markets, the marine equipments such as?offshore drilling platform, subsea oil and gas transportation pipeline, and storage equipment of oil and gas are?developing actively. It is urgent to develop a new type of steel with low cost and excellent toughness to satisfy the?demand of marine equipment. In this work, the morphology of austenite and phase transition process in medium?manganese steel during quenching and tempering (QT) and quenching, lamellarizing and tempering (QLT) heat?treatments were investigated by using EBSD, HRTEM and thermal dilatometer. The results show that the?discrepancy of stability in austenite caused by its shape, size and location leads to the more excellent toughness?during QLT heat treatment compared to QT. It has been found from thermodynamical and dynamical viewpoint?that the formation rates of reverted austenite during QLT heat treatment are significantly larger relative to QT due?to the partition process of C and Mn elements in the lamellarizing stage. Moreover, two growth models of?film-type reverted austenite are distinct during two heat treatments: the unidimensional two-sided growth mode?during QT and unidimensional one-sided growth mode?during QLT.?
作為值得信賴的合作伙伴和高品質金屬合金的半成品供應商，艾荔艾擁有完善的服務體系和專業(yè)的團隊。在同客戶交易的過程中，我們力求根據不同的應用需求將我們的產品做到精益求精。針對當前和未來的市場需求，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.
獲取更多我們供應的合金和服務信息，請致電086-021-67660801或發(fā)電子郵件kefu@ailiaigroup.com聯系我們，您也可以通過微博，微信，領英和推特與我們互動。
For more information on the alloys and services that we supply,?call us?at 086-021-67660801 or email us at kefu@ailiaigroup.com. You can also get in touch on social media, we are constantly active on?Weibo,?Weixin,?LinkedIn?and?Twitter.