借助于光学显微镜和X射线衍射仪等研究了奥氏体不锈钢弹簧丝在经过97.7%的大变形后抗拉强度高达1980 MPa的强化现象。结果表明,钢丝的硬度和抗拉强度随着变形量的增加而升高。在大变形量时,沿拉拔方向的组织趋向纤维化,变形马氏体的体积分数在增加,拉拔钢丝的抗拉强度值升高的幅度增加。分析认为变形强化,纤维组织强化和马氏体相变强化是大变形强化的主要原因。
Austenitic stainless steel spring wire with tensile strength of 1980 MPa was prepared by severely cold-drawing at reduction of 97.7%.The cold-drawing strengthening behavior of austenitic stainless steel was investigated by optical microscope（OM） and X-ray diffraction（XRD）.The results indicate that with the increase of the reduction,Vickers hardness and tensile strength of the steel increase,and volume fraction of martensite transformed from austenite increases and fiber microstructure forms at heavy reduction.The possible explanation of the strengthening for the heavily deformed steel is associated with work hardening,fiber strengthening and martensitic trarsformation strengthening.
参考文献
| [1] | 史美堂;张士林;查攀美 .奥氏体不锈钢大变形量形变热处理强化机理[J].上海金属,1981,3(03):29-35. |
| [2] | Yang Y S;Bae J G;Park C G .Microstrucrure and mechanical propertiies of heavily cold-drawn steel wires[J].Materials Science and Enginereing A,2009,508:148-155. |
| [3] | 李窘;方威;胡小军 .高强度SUS304不锈钢线切割丝生产工艺研究[J].金属制品,1999,29(03):20-22. |
| [4] | Krasilnikov N;Lojkowski W;Pakiela Z;Valiev R .Tensile strength and ductility of ultra-fine-grained nickel processed by severe plastic deformation[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):330-337. |
| [5] | 寇宏宁,刘国权,杨建春,白鸿柏.金属橡胶用Cr-Ni-Mn系不锈钢丝的微观组织及力学性能研究[J].航空材料学报,2006(04):24-28. |
| [6] | 许康萍,张萌.超细不锈钢微丝拉拔过程中显微组织及力学性能[J].南昌大学学报（理科版）,2008(02):173-177. |
| [7] | 毛萍莉,苏国跃,孔凡亚,程谦.1Cr18Ni9Ti超高强度不锈钢丝的微观组织分析[J].热加工工艺,2004(02):32-33. |
| [8] | Jeom-Yong Choi;Won Jin .Strain induced martensite formation and its effect on strain hardening behavior in the cold drawn 304 austenitic stainless steels[J].Scripta materialia,1997(1):99-104. |
| [9] | 董秀萍,刘国权,杨建春,白鸿柏.金属橡胶用冷拉拔奥氏体不锈钢丝的微观组织[J].航空材料学报,2007(06):35-39. |
| [10] | 黄文克,孔凡亚.冷拔高强00Cr18Ni10N不锈钢丝显微组织与力学性能[J].金属学报,2009(03):275-279. |
| [11] | Nieh T G;Wadsworth J .Hall-Petch relation in nanocrystalline solid[J].Scripta Materialia,1991,25:955-958. |
| [12] | 范建文 .800MPa级低合金钢超细晶组织与力学性能的研究[D].钢铁研究总院,2000. |
| [13] | Yuwei Gao,Tianfu Jing,Guiying Qiao,Jinku Yu,Tiansheng Wang,Qun Li,Xinyu Song,Shuqiang Wang,Hong Gao.Microstructural evolution and tensile properties of low-carbon steel with martensitic microstructure during warm deforming and annealing[J].北京科技大学学报(英文版),2008(03):245-249. |
| [14] | Okitsu Y;Takata N;Tsuji N .A new route to fabricate uhrafine-grained structures in carbon steels without severe plastic deformation[J].Scripta Materialia,2009,15:76-79. |
| [15] | Jing Tianfu;Gao Yuwei;Qiao Guiying;Li Qun;Wang Tiansheng;Wang Wei;Xiao Furen;Cai Dayong;Song Xinyu;Zhao Xin .Nanocrystalline steel processed by severe rolling of lath martensite[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):216-220. |
| [16] | 苏德达 .冷拔碳素钢丝的纤维组织及其亚结构[J].金属制品,1999,29(03):1-3. |
| [17] | M. ESKANDARI;A. KERMANPUR;A. NAJAFIZADEH .Formation of Nanocrystalline Structure in 301 Stainless Steel Produced by Martensite Treatment[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2009(9):2241-2249. |
| [18] | 肖纪美.不锈钢的金属学问题[M].北京:冶金工业出版社,2006 |
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