氮强化高锰奥氏体钢热变形行为研究Deformation behavior of nitrogen strengthened high manganese austenitic steel
逯允海,付瑞东,邱亮,张静
摘要(Abstract):
利用Gleeble-3500热力模拟试验机在温度为1253~1423K,应变速率为0.1~10s-1的条件下对32Mn-7Cr-1Mo-0.3N奥氏体钢进行了热压缩变形试验,测定了其真应力-应变曲线,观察了变形后的组织。试验结果表明,流变应力和峰值应变随变形温度的降低和应变速率的提高而增大。真应变为0.6时,在1423K、应变速率在0.1~10s-1之间的试样均已发生完全动态再结晶;在1373K以下变形时,应变速率在0.1~10s-1之间,试样发生部分动态再结晶。动态再结晶晶粒尺寸随着变形温度的升高而增大,随着应变速率的升高而减小。32Mn-7Cr-1Mo-0.3N奥氏体钢的热变形激活能Q值为469.03kJ/mol,并获得热变形方程。
关键词(KeyWords): 高锰奥氏体钢;热变形;流变应力;动态再结晶;热变形激活能
基金项目(Foundation): 国家自然科学基金(59771001);; 河北省自然科学基金(E2004000197)
作者(Author): 逯允海,付瑞东,邱亮,张静
参考文献(References):
- [1]Shimamoto S,Nakajima H.Requirements for structural alloys for superconducting magnet cases[A].Advances in Cryogenic Engineering Materials[C].Clark AF,Reed R P,eds.NY:Plenum,1986,32:23-26.
- [2]付瑞东,任伊宾,郑炀曾,等.一种高锰奥氏体低温钢的力学性能[J].机械工程学报,2001,37(3):78-80.FURui-dong,REN Yi-bin,ZHENG Yang-zeng,et al.Mechanical property of a high manganese austenitic steel[J].Chinese Journal of MechanicalEngineering,2001,37(3):78-80.
- [3]付瑞东,任伊宾,郑炀曾.32Mn-7Cr-0.6Mo-0.3N奥氏体低温钢的组织和拉伸性能[J].特殊钢,2001,22(2):19-21.FU Rui-dong,REN Yi-bin,ZHENG Yang-zeng.Microstructure and tensile property of 32Mn-7Cr-0.6Mo-0.3N austenitic cryogenic steel[J].Special Steel,2001,22(2):19-21.
- [4]张北江,赵光谱,焦兰英.热加工工艺对GH4586合金微观组织的影响[J].金属学报,2005,41(4):351-356.ZHANG Bei-jiang,ZHAO Guang-pu,JIAO Lan-ying.Effects of thermal-mechanical processing on microstructure of GH4586 steel[J].Acta MetallurgicaSinica,2005,41(4):351-356.
- [5]Rao K P,Hawbolt E B.Development of constituted relationship using compressing testing of a medium carbon steel[J].ASME J Eng Mater and Tech,1992,114(3):116-123.
- [6]Jonas J J,Sellers C M.Strength and structure under hot working conditions[J].International Metallurgical Reviews,1969,14:1-24.
- [7]Zener C,Hollomon J H.Effect of strain rate upon the plastic flow of steel[J].J Appl Phys,1944,15(1):22-32.
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