本文選題：軸承鋼 + 合金元素V　； 參考：《材料熱處理學(xué)報(bào)》2015年07期

【摘要】：通過掃描電子顯微鏡、透射電子顯微鏡、XRD技術(shù)、EBSD分析、動(dòng)態(tài)相變規(guī)律研究以及力學(xué)性能測(cè)試,研究了不同熱處理工藝及合金元素V的加入對(duì)高碳鉻軸承鋼GCr15的顯微組織和性能的影響。結(jié)果表明,強(qiáng)碳化物形成元素V添加后,動(dòng)態(tài)CCT曲線向右下方移動(dòng),抑制了二次碳化物的析出和珠光體轉(zhuǎn)變,Ms點(diǎn)降低;添加V后,淬回火處理和貝氏體等溫淬火處理后強(qiáng)度、硬度和沖擊韌性均有不同程度提高;通過添加合金元素V,可以消除淬回火處理過程中出現(xiàn)的淬火微裂紋,提高性能;V的添加還能降低熱處理后殘留奧氏體含量,提高工件尺寸穩(wěn)定性;盡管,添加V會(huì)很小程度的抑制貝氏體轉(zhuǎn)變,考慮到V對(duì)性能的貢獻(xiàn),綜合考慮認(rèn)為,高碳鉻軸承鋼中添加V利大于弊。
[Abstract]:By means of scanning electron microscope, transmission electron microscope, XRD technique, EBSD analysis, dynamic phase transformation and mechanical properties test, The effects of different heat treatment processes and the addition of alloy element V on the microstructure and properties of high carbon chromium bearing steel GCr15 were studied. The results show that the dynamic CCT curve moves to the lower right after the addition of the strong carbides forming element V, which inhibits the precipitation of secondary carbides and the decrease of the pearlite transformation Ms points, and the strength after quenching and tempering treatment and bainite isothermal quenching after adding V, The hardness and impact toughness are improved in varying degrees, by adding alloy element V, the quenching microcracks occurring during quenching and tempering treatment can be eliminated, and the content of retained austenite after heat treatment can be reduced by increasing the properties and adding V. In view of the contribution of V to the properties, it is considered that the advantages of adding V to high carbon chromium bearing steel outweigh the disadvantages.
【作者單位】： 北京科技大學(xué)冶金工程研究院;
【基金】：國(guó)家高技術(shù)研究發(fā)展計(jì)劃“863”項(xiàng)目(2012AA03A508)
【分類號(hào)】：TG142.1

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本文編號(hào)：1964912