研究了"淬火-配分-(回火)"(Q-P(-T))工艺处理对35Si2Ni2钢显微组织和力学性能的影响,并与传统的淬火回火(Q-T)工艺进行比较,用SEM、TEM、XRD分析了微观组织.试验结果表明:相对于传统Q-T工艺,经Q-P工艺处理后得到了较多的残余奥氏体,强度水平稍有降低,而塑韧性明显提高,经Q-P工艺处理后再进行回火处理,残余奥氏体分解,析出e碳化物,导致Q-P工艺处理钢的屈服强度升高,屈强比升高.
The effect of "Quenehing-Partitioning-(Tempering)(Q-P(-T)) process on the microstructure and mechan-ical properties of 35Si2Ni2 steel were investigated, and compared them with traditional Quenching-Tempering(Q-T) process. Microstructure was studied by using SEM, TEM and XRD. The results show that samples treated by quenching-partitioning get more retained austenite compared with traditional quenching-tempering process, the strength decrease slightly, while the ductility and toughness improved markedly. Retained austenite of the samples treated by quenching-partitioning-tempering process decomposited and ε carbides precipitated, which resulted the in-creasing of yield sitrength, as well as the yield ratio.
参考文献
| [1] | Matlock D K Br;(a)utigam V E;Speer J G .Application of the Quenching and Partitioning ,(Q＆P) Process to a MediumCarbon High Si Microalloyed Bar Steel[J].Mater:Sci Forum,2003,426-432:1089. |
| [2] | Bhadeshin H K D H;Edmonds D V .The Bainite Transformation in Silicon Steel[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1979,10A:895. |
| [3] | Gallagher M F;Speer J G;Matlock D K.Micrustructure Development in TRIP-Sheet Steels Containing Si,A1 and P[A].Warrenddale:Iron and Steel Society,2002:153. |
| [4] | Rizzo F;Martins A R;Speer J G .Quenching and Partitioning of Ni-Added High Strength Steel[J].Materials Science Forum,2007,539-543:4476. |
| [5] | Zhong N;Wang X D;Hoang B X.Microstructures and Mechanical Property of Quenched and Partitioned Fe-C-Mn-Si Steel[A].Gyeongju:Inst.Metals and Materials,2006:885. |
| [6] | DeCooman B C;Speer J G.Microstructure-Properties Relationships in Quench and Partition (Q＆P) Steel,Implications for Automotive Anti-Instrusion Applications[A].Gyeongju:Inst.Metals and Materials,2006:798. |
| [7] | 徐祖耀.用于超高强度钢的淬火-碳分配-回火（沉淀）（Q-P-T）工艺[J].热处理,2008(02):1-5. |
| [8] | Ridley N;Stuart H;Zwell L .Lattice Parameters of Fe-C Austenites at Room Temperature[J].Transactions TMS-AIME,1969,245:1834. |
| [9] | Koistinen D P;Marburger R E .A General Equation Prescribing the Extent of the Austenite-Martensite Transformation in Pure Ironcarbon Alloys and Plain Carbon Steel[J].Acta Metallurgica,1959,7:59. |
| [10] | Rao B V N;Thomas C .Structure-Property Relations and the Design of Fe-4Cr-C Base Structural Steels for High Strength and Toughness[J].Metallurgical Transactions,1980,11A:441. |
| [11] | 景财年,王作成,韩福涛.相变诱发塑性的影响因素研究进展[J].金属热处理,2005(02):26-31. |
| [12] | 赵松山,唐荻,赵才,江海涛,李辉.Q & P钢残余奥氏体定量分析及分布规律研究[J].钢铁研究,2007(06):14-17. |
| [13] | 愈德刚.铁基马氏体时效-回火转变理论及其强韧性[M].上海:上海交通大学出版社,2008 |
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