采用SEM、TEM及EDS分析技术,研究了含钛、铌等多种微合金元素的高强钢中碳氮化物的溶解行为.结果表明:保温30 min,加热温度低于1 200℃时,钢中未溶颗粒主要是球形和椭球形;加热温度为1 250℃时,未溶颗粒以圆角的长形及方形为主.上述颗粒均为含铌和钛的复合碳氮化物.随加热温度的升高,球形、椭球形颗粒减少,长形及方形颗粒增多.圆角的长形及方形颗粒中Ti/Nb原子比显著高于球形和椭球形颗粒.加热温度为1 250℃时,长形及方形颗粒中的Ti/Nb原子比约为97/3.
参考文献
| [1] | Hong S G;Kang K B;Park C G .Strain-Induced Precipitation of Nb in Nb and Nb-Ti Microalloyed HSLA Steels[J].Scripta Materialia,2002,46(02):163-168. |
| [2] | Edutta B;Valdes E;Scllar C M .Mechanical and Kenitics of Strain Induced Precipitation of Nb(C,N) in Microalloyed Austenite[J].ACTA METALLURGICA ET MATERIALIA,1992,44(04):653-658. |
| [3] | Liu W J;Jonas J J .Nucleation Kinetics of Ti Carbonitride in Microalloyed Austenite[J].METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,1989,20A:689-697. |
| [4] | Poths R M;Higginson R L;Palmiere E J .Complex Precipitation Behavior in a Microalloyed Plate Steel[J].Scripta Materialia,2001,44(01):147-153. |
| [5] | Craver A J;He K;Garvie L A J et al.Complex Heterogeneous Precipitation in Ti-Nb Microalloyed Al-Killed HSLA Steels-I,(Ti,Nb) (C,N) Particles[J].Acta Materialia,2000,48:3857-3868. |
| [6] | Li Y;Crowther D N;Mitchell P S.The Evolution of Microstructure in Vanadium Microalloyed Steels[A].Beijing:Chinese Society for Metals,2001:83-98. |
| [7] | Houghton D C;Weatherly G C;Embury J D.Thermomechanical Processing of Microalloyed Austenite[M].Metallurgical Society of AIME,1982:682-683. |
| [8] | He K;Baker T N .The Effects of Small Titanium Additions on the Mechanical Properties and the Microstructures of Controlled Rolled Niobium-Bearing HSLA Plate Steels[J].MATERIAL SCIENCE AND ENGINEERING,1993,169A:53-65. |
| [9] | Lagneborg R;Siwecki T;Zajac S et al.The Role of Vanddium in Microalloyed Steels[J].Scandinavian Journal of Metallurgy,1999,28:186-241. |
| [10] | Güth A;Kaun L;Koüthe A et al.Investigation of the Influence of the Reheating Temperature on Size and Composition of Precipitates in Microalloyed HSLA Steels by Analytical Electron Microscopy[J].Scripta Metllurgica,1987,21:163-168. |
| [11] | Houghton D C .Equilibrium Solubility and Composition of Mixed Carbonitrides in Microalloyed Austenite[J].Acta Metalluraica,1993,41(10):2993-3006. |
| [12] | 唐国翌 .V-Ti-N复合微合金钢物理冶金及断裂机理研究[D].钢铁研究总院,1990. |
| [13] | 雍岐龙.微合金钢-物理和力学冶金[M].北京:机械工业出版社,1989 |
| [14] | Craven A.J.;He K. .COMPLEX HETEROGENEOUS PRECIPITATION IN TITANIUM- NIOBIUM MICROALLOYED Al-KILLED HSLA STEELS-II. NON-TITANIUM BASED PARTICLES[J].Acta materialia,2000(15):3869-3878. |
| [15] | 于浩 .CSP热轧低碳钢板组织细化与强化机理研究[D].北京科技大学,2003. |
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