超高强铁素体/贝氏体双相钢的控轧控冷实验研究

特殊钢 ›› 2019, Vol. 40 ›› Issue (6): 18-22.

超高强铁素体/贝氏体双相钢的控轧控冷实验研究

高尉钧，王潑旭，张润奇，蔡一钦，李壮，刘艳敏，于涛，李朝华

沈阳航空航天大学材料科学与工程学院，沈阳H0136

收稿日期:2019-05-25 出版日期:2019-12-01 发布日期:2022-05-10
作者简介:高尉钧(1997-),男，沈阳航空航天大学(本科生)，金属材料组织和性能研究。
基金资助:
国家863科研项目(2015AA03A501),
沈阳航空航天大学大学生创新创业训练计划项目(110418033)

Experimental Research on Control Rolling and Cooling of Ultrahigh-Strength Ferrite-Bainite Dual-phase Steel

Gao Weijun,Wang Haoxu,Zhang Runqi,Cai Yiqin,Li Zhuang,Liu Yanmin,Yu Tao ，Li Zhaohua

College of Materials Science and Engineering,Shenyang Aerospace University,Shenyang 110136

Received:2019-05-25 Published:2019-12-01 Online:2022-05-10

摘要/Abstract

摘要： 在实验室Φ450 mm轧机上进行了铁素体/贝氏体双相钢（/%:0.22C,0.47Si,2.50Mn,0.05Al,0.02Nb,0.41 Cu）终轧800～860℃的控轧控冷实验。结果表明,实验钢经控轧控冷后,获得以铁素体/贝氏体双相组织为主并含有少量残余奥氏体+马氏体的复相组织。降低终轧温度、加快冷却速度可使铁素体晶粒细化。800℃终轧后层流冷却到560℃,然后空冷到室温的实验钢组织中残余奥氏体含量为11.4%,对强度和韧性的良好匹配贡献很大,其力学性能为:抗拉强度（R_m）1131MPa ,屈强比(R_p0.2/R_m)0.61,伸长率(A₅₀)16%,强塑积(Rm×A₅₀)18096 MPa·%

Abstract: The control rolling and cooling test of ferrite-bainite dual phase steel (/% :0. 22C,0. 47Si,2. 50Mn, 0.05Al,0.02Nb,0.41 Cu) with finishing rolling at 800 ~860 ℃. is carried out by a Φ450 mm mill in laboratory. The results show that a microstructure containing ferrite, bainite, martensite and retained austenite in test steel can be obtained ；the ferrite grains are refined with decreasing finish rolling temperature and accelerating cooling；the amount of retained austenite is 11.4% when the steel finished rolling at 800 °C and subsequent laminar cooled to 560 ℃. and then air cooled to room temperature to contribute a lot to comprehensive properties of strength and toughness, its mechanical properties are UI R_m 1131 MPa,R_p0.2/Rm 0.61，R_m xA₅₀ 18096 MPa · %

Key words: Ultrahigh-Strength Dual-Phase Steel, Controlled Rolling and Cooling, Low Finish Rolling Temperature, Accelerating Cooling

高尉钧, 王潑旭, 张润奇, 蔡一钦, 李壮, 刘艳敏, 于涛, 李朝华. 超高强铁素体/贝氏体双相钢的控轧控冷实验研究[J]. 特殊钢, 2019, 40(6): 18-22.

Gao Weijun, Wang Haoxu, Zhang Runqi, Cai Yiqin, Li Zhuang, Liu Yanmin, Yu Tao , Li Zhaohua. Experimental Research on Control Rolling and Cooling of Ultrahigh-Strength Ferrite-Bainite Dual-phase Steel[J]. Special Steel, 2019, 40(6): 18-22.

参考文献

[1]武万斌，年雪山.汽车轻量化技术发展趋势[J].汽车工程师，2017,1:15-17.
[2]王存宇，杨洁，常颖，等.先进高强度汽车钢的发展趋势与挑战[J].钢铁,2019,54(2):1-6.
[3]曹晓恩，程迪,武志杰，等.汽车用高强度钢CR1O3O/13OOMS 连铸板坯的热塑性[J].特殊钢,2018,39(3)：14
[4]刘斌，吴润，王孟，等.高强度热轧双相钢的低周疲劳性能[J].钢铁研究学报,2017,29(8):667-670.
[5]吴腾，李会，吴润，等.高强热轧双相钢中组织对性能的影响[J] .材料科学与工程学报,2018,36(1):14
[6]蔡明晖，丁桦，张建苏，等.铁素体/贝氏体双相钢的变形和断裂特性[J].材料研究学报,2009,23(1) ：83 -88.
[7]Basiruddin S M, Alam I,Chakrabarti D. The Role of Fibrous Morphology on the Charpy Impact Properties of Low Carbon Ferrite-Bainite Dual Phase Steel [J] . Materials Science and Engineering A, 2018, 716:208-219.
[8] Ishikawa N, Yasuda K, Sueyoshi H, et al. Microscopic Deformation and Strain Hardening Analysis of Ferrite-Bainite Dual-Phase Steels Using Micro-Grid Method [J]. Acta Materialia,2015 ,97 ：257-268.
[9] Li Z, Wu D；Lu W. Effect of Holding Time on the Microstructure and Mechanical Properties of Dual-Phase Steel During Intercritical Annealing[J] . Journal Wuhan University of Technology, Materials Science Edition,2015,30(1)： 156-161.
[10] Li Z,Tian Y, Kang Shaopu. Effect of Fast Cooling Rate on the Microstructure and Mechanical Properties of Low-Carbon high-Strength Steel Annealed in the Intercritical Region [ J ]. Journal Wuhan University of Technology, Materials Science Edition ,2014,29 ( 3) : 572-577.
[11] Ryu H B, Speer J G. Effect of Thermomechanical Processing on the Retained Austenite Content in a Si - Mn Transformation-Induced- Plasticity [J]. Metallrugical and Materials Transactions A,2002,33 : 2811-2816.
[12]Weng Y Q,Sun X J,Dong H,et al. Overview on the Theory of Deformation Induced Ferrite Transformation [J]. Iron & Steel Supplement, 2005 ,40 ：9-15.