锻压技术

高层建筑抗震钢板的轧制工艺与组织性能

英文标题：Rolling technology and microstructure and properties on seismic steel plate for highrise buildings

作者：赵夏清邢炜卢凤奇沈功福

分类号：TG142.1

出版年,卷(期):页码：2021,46(1):186-190

摘要：

采用光学显微镜和万能拉伸试验机等研究了轧制过程中的开冷温度和终冷温度对Q550D钢板的显微组织、铁素体和M/A岛占比以及室温拉伸性能的影响。结果表明，不同开冷温度和终冷温度下，试样中M/A岛的形态主要为颗粒状、块状和断续分布的长条状，且M/A岛主要分布在贝氏体或者铁素体的相界处；试样中M/A岛体积分数会随着开冷温度或终冷温度的降低而不断增加，铁素体含量会随着开冷温度和终冷温度的降低而分别呈现逐渐增加和略有减小的特征；在相同终冷温度下，降低开冷温度对试样抗拉强度的影响不大，而屈服强度和屈强比减小；相同开冷温度下，终冷温度的减小会使得屈服强度和屈强比增大；当开冷温度为755 ℃、终冷温度为395 ℃时，试样具有最佳的综合性能，此时抗拉强度和屈服强度分别为781和640 MPa、屈强比为0.82，满足590 MPa级抗震钢板的技术要求。

The influences of initial cooling temperature and final cooling temperature on microstructure, ferrite, M/A island proportion and tensile properties at room temperature of Q550D steel plate were studied by optical microscope and universal tensile testing machine. The results show that under different initial cooling temperatures and final cooling temperatures, the shapes of M/A islands in the sample are mainly granular, massive and intermittently distributed strips, and the M/A islands are mainly distributed at the boundary of bainite or ferrite. The volume fraction of M/A islands in the sample increases with the decreasing of the initial cooling temperature or the final cooling temperature, and the ferrite content increases gradually with the decreasing of the initial cooling temperature and decreases slightly with the decreasing of the final cooling temperature. Under the same final cooling temperature, the influence of reducing the initial cooling temperature on the tensile strength of sample is not significant, but the yield strength and yield strength ratio decrease. Under the same initial cooling temperature, the reduction of the final cooling temperature increases the yield strength and yield strength ratio. When the initial cooling temperature is 755 ℃ and the final cooling temperature is 395 ℃, the sample has the best comprehensive performance, the tensile strength and yield strength are 781 and 640 MPa respectively, and the yield strength ratio is 0.82, which meets the technical requirements of anti-seismic steel plate with 590 MPa grade.

基金项目：

基金项目:陕西省科技攻关资助项目(2018KD8-G16)

作者简介：赵夏清（1986-），女，硕士，讲师 E-mail：404628984@qq.com

参考文献：

[1]郭子峰, 张衍,李秋寒,等.终轧温度对热轧双相钢DP580组织及性能影响[J].锻压技术,2019, 44(6): 188-192.

Guo Z F, Zhang Y, Li Q H, et al. Effect of final rolling temperature on microstructure and properties of hot rolled DP580 dual phase steel[J]. Forging & Stamping Technology, 2019, 44(6): 188-192.

[2]林双平, 苗明明, 张岩, 等. 建筑用高强抗震钢筋[J].金属热处理,2012,37(7):102-105.

Lin S P, Miao M M, Zhang Y, et al. High strength seismic reinforcement for building [J]. Heat Treatment of Metals, 2012, 37 (7): 102-105.

[3]张莉芹, 童明伟,吴开明.屈服强度550 MPa级抗震建筑用钢回火性能研究[J].钢铁钒钛, 2017, 38(3): 124-129.

Zhang L Q, Tong M W, Wu K M. Study on tempering performance of 550 MPa yield strength earthquake resistant building steel [J]. Iron Steel Vanadium Titanium, 2017, 38 (3): 124-129.

[4]段琳娜, 赵晓丽,刘清友,等.Mo含量及冷却工艺对低碳贝氏体钢组织与M/A岛的影响[J].材料热处理学报, 2014, 35(10):142-147.

Duan L N, Zhao X L, Liu Q Y, et al. Effect of Mo content and cooling process on Microstructure and M/A island of low carbon bainitic steel [J]. Transactions of Materials and Heat Treatment, 2014, 35(10): 142-147.

[5]Tamimi S, Ketabchi M, Parvin N. Microstructural evolution and mechanical properties of accumulative roll bonded interstitial free steel[J]. Materials and Design, 2009, 30(7):2556-2562.

[6]GB/T 228—2002, 金属材料室温拉伸试验方法[S].

GB/T 228—2002, Metallic materials—Tensile testing at ambient temperature[S].

[7]Ko Y G, Lee J S, Loorentz. Microstructure evolution and mechanical properties of ultrafine grained IF steel via multipass differential speed rolling[J]. Materials Science and Technology, 2013, 29(5):553-558.

[8]Tamimi S, Gracio J J, Lopes A B, et al. Asymmetric rolling of interstitial free steel sheets: Microstructural evolution and mechanical properties[J]. Journal of Manufacturing Processes, 2018, 31:583-592.

[9]陈华辉, 梁锐.控轧控冷对高强建筑用钢组织与性能的影响[J].金属热处理,2019,44(1):138-142.

Chen H H, Liang R. Effect of controlled rolling and controlled cooling on microstructure and properties of high strength building steel [J]. Heat Treatment of Metals, 2019, 44 (1): 138-142.

[10]Yan B, Jiao S H, Zhang D H. Microstructure and mechanical properties of semicontinuous equalchannel angular extruded interstitialfree steel[J]. Journal of Iron and Steel Research, International, 2016, 23(2):160-165.

[11]温长飞, 邓想涛,王昭东,等.轧制冷却工艺对低合金超高强钢Q1300组织性能的影响[J].轧钢, 2018, 35(5): 6-11.

Wen C F, Deng X T, Wang Z D, et al. Effect of rolling cooling process on microstructure and properties of low alloy ultra high strength steel Q1300 [J]. Steel Rolling, 2018, 35 (5): 6-11.

[12]Liu G, Ma Y, Zhang R, et al. Surface nanocrystallization of silicon steel induced byasymmetric rolling and effect of rolling parameters[J]. Acta Metallurgica Sinica, 2014, 50(9):1071-1077.

[13]Verma D, Mukhopadhyay N K, Sastry G V S, et al. Microstructure and mechanical properties of ultrafinegrained interstitialfree steel processed by ECAP[J]. Transactions of the Indian Institute of Metals, 2016, 70(4):1-10.

[14]Kim H S, Ryu W S, Janecek M, et al. Effect of equal channel angular pressing on microstructure and mechanical properties of IF steel[J]. Advanced Engineering Materials, 2005, 7(1-2):43-46.

[15]Orlov D, Lapovok R, Tóth L S, et al. Asymmetric rolling of interstitialfree steel using differential roll diameters. Part II: microstructure and annealing effects[J]. Metallurgical and Materials Transactions A, 2014, 45(1): 447-454.

[16]Jamaati R, Toroghinejad M R, Amirkhanlou S, et al. Microstructural evolution of nanostructured steelbased composite fabricated by accumulative roll bonding[J]. Materials Science and Engineering: A, 2015, 639:298-306.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】