研究了S30432耐热钢在650 ℃时效时的微观组织和力学性能,特别探讨了S30432钢时效过程中析出相的变化对力学性能的影响.结果表明,实验合金时效初期ε-Cu和M23C6大量析出,随后逐渐长大,其中M23C6尺寸较大且粗化较快,但ε-Cu长期时效后尺寸依然细小.时效初期硬度升高的主要原因是ε-Cu的析出,长期时效过程中ε-Cu尺寸保持细小是硬度稳定在较高水平的主要原因.此外,时效初期由于M23C6大量析出冲击韧性急剧下降,随后M23C6的粗化是冲击韧性继续下降的主要原因.
参考文献
| [1] | Muramatsu K.Advanced Heat Resistant Steel for Power Generation[M].Cambridge:Cambridge University Press,1999 |
| [2] | Fujio Abe .Precipitate design for creep strengthening of 9% Cr tempered martensitic steel for ultra-supercritical power plants[J].Science and Technology of Advanced Materials,2008,9:1-15. |
| [3] | Masaaki Igarashi .Long-term creep characteristics of advanced hear-resistant stainless steels for fossil fired power plant boilers[J].Current Advancements in Molecular Medicines,2004,17:336-339. |
| [4] | Sourmail T. .Precipitation in creep resistant austenitic stainless steels [Review][J].Materials Science and Technology: MST: A publication of the Institute of Metals,2001(1):1-14. |
| [5] | Kota SAWADA;Hideaki KUSHIMA;Kazuhiro KIMURA .Z-phase Formation during Creep and Aging in 9-12% Cr Heat Resistant Steels[J].ISIJ International,2006(5):769-775. |
| [6] | Yuichi FUTAMURA;Toshihiro TSUCHIYAMA;Setsuo TAKAKI .Strengthening Mechanism of Cu bearing Heat Resistant Martensitic Steels[J].ISIJ International,2001(Suppl.):106-110. |
| [7] | Hideto Kimura .Precipitation behavior and 2-step aging of 17-4PH stainless steel[J].鉄と鋼,2000(5):343-348. |
| [8] | Isheim D;Kolli RP;Fine ME;Seidman DN .An atom-probe tomographic study of the temporal evolution of the nanostructure of Fe-Cu based high-strength low-carbon steels[J].Scripta materialia,2006(1):35-40. |
| [9] | Fukuya K.;Ohno K.;Nakata H.;Dumbill S.;Hyde JM. .Microstructural evolution in medium copper low alloy steels irradiated in a pressurized water reactor and a material test reactor[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2003(2/3):163-173. |
| [10] | Dieter Isheim;Semyon Vaynman;Morris E. Fine .Copper-precipitation hardening in a non-ferromagnetic face-centered cubic austenitic steel[J].Scripta materialia,2008(12):1235-1238. |
| [11] | C.H. Gur;I Yildiz .Non-destructive investigation on the effect of precipitation hardening on impact toughness of 7020 Al-Zn-Mg alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):395-400. |
| [12] | Maribel L. Saucedo-Munoz;Yutaka Watanabe;Tetsuo Shoji .Effect of microstructure evolution on fracture toughness in isothermally aged austenitic stainless steels for cryogenic applications[J].Cryogenics,2000(11):693-700. |
| [13] | Kaishu Guan;Xiaodong Xu;Hong Xu;Zhiwen Wang .Effect of aging at 700℃ on precipitation and toughness of AISI 321 and AISI 347 austenitic stainless steel welds[J].Nuclear engineering and design,2005(23):2485-2494. |
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