常規(guī)奧氏體化后后續(xù)熱處理對35CrNi3MoV鋼組織與性能的影響
發(fā)布時間:2018-06-07 22:29
本文選題:Cr + NiMo; 參考:《材料熱處理學報》2017年12期
【摘要】:通過硬度測試、室溫拉伸實驗、低溫沖擊實驗研究了常規(guī)奧氏體化后后續(xù)熱處理對35Cr Ni3Mo V鋼的組織與性能的影響。結(jié)果表明:相比常規(guī)奧氏體化淬火,經(jīng)常規(guī)奧氏體化淬火+回火熱處理工藝處理(860℃×6 h+810℃×2 h,油冷淬火+600℃×16 h,油冷回火)后,鍛件的低溫沖擊韌性提高了約33%,硬度為326 HB,室溫拉伸強度略微下降,伸長率提高了約3.65%;在常規(guī)奧氏體化淬火+回火熱處理工藝下(860℃×6 h+780℃×2 h,油冷淬火+600℃×16 h,油冷回火),鍛件的低溫沖擊韌性與常規(guī)奧氏體化淬火相比提升了約4.1%,室溫拉伸強度和伸長率分別提升了約8.4%和9.62%,硬度為356 HB。在810℃低溫奧氏體化淬火下,降低了鍛件的強度并大幅度提高了室溫沖擊韌性,晶粒組織均勻且細小。在780℃亞溫淬火下,大幅度提高鍛件強度的同時也小幅度提高了室溫沖擊韌性。
[Abstract]:The effect of post-austenitizing heat treatment on the microstructure and properties of 35Cr Ni 3Mo V steel was studied by hardness test, tensile test at room temperature and impact test at low temperature. The results show that: compared with conventional austenitizing quenching, after conventional austenitizing quenching and tempering heat treatment, 860 鈩,
本文編號:1993051
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