用透射电子显微镜(TEM)对高氮奥氏体中温回火的相变特征作进一步的观察,发现晶内首先发生连续相变形成亚稳定体系,该连续分解产物与晶界、位错等缺陷处的非连续分解产物各自形成独立的分解区域.随回火时间延长,进一步分解成稳定的α+γ′Fe4N,最终形成二相纳米尺度稳定组织,硬度超过900HV.
参考文献
[1] | Bell T;Kinali M;Munsterman G .Physical metallurgy aspects of the austenitic nitrocarburising process[J].Heat Treatment of Metals,1987,14(02):47-51. |
[2] | 杨学斌.奥氏体氮碳共渗层中的Fe-N-C贝氏体[J].热加工工艺,1995(06):21. |
[3] | Foct J;Rochegude P;Hendry A .Low temperature aging of Fe-N austenite[J].Acta Materialia,1988,36(05):501-505. |
[4] | Gavriljuk V.G.;Shanina B.D. .ON THE CORRELATION BETWEEN ELECTRON STRUCTURE AND SHORT RANGE ATOMIC ORDER IN IRON-BASED ALLOYS[J].Acta materialia,2000(15):3879-3893. |
[5] | Pekelharing M I et al.Application of the cluster variation method to ordering in and interstitial solid solution the γ′-Fe[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1999,30:1945. |
[6] | Kwan H Han;Young K Song .Structure of freshly formed and low-temperature aged Fe-N austenite[J].Materials Science and Engineering,1999,A260(1-2):246-251. |
[7] | 高氮奥氏体的等温分解[J].热加工工艺,2000(02):3-5. |
[8] | 潘健生,胡明娟,朱祖昌,韩福梅,邱春城.高氮奥氏体特殊中温转变现象的初步观察[J].金属热处理,2000(02):19-22. |
[9] | Hu M J;PanJS;ZhuZC.Morphology of special phase transformation products in high nitrogen austenite[M].Melbourne,Australia,2000:105-110. |
[10] | 潘健生,邱春城,胡明娟,戎咏华,朱祖昌.Fe-N奥氏体中析出纳米级γ'现象的初步研究[J].材料热处理学报,2001(02):1-4. |
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