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ZHANG Runzhi, LIU Zhiqi. Effect of Final Cooling Temperature in Controlled Rolling and Cooling Process on Microstructure and Tensile Properties of High Strength Building Steel[J]. Materials and Mechanical Engineering, 2020, 44(7): 66-69. DOI: 10.11973/jxgccl202007014
Citation: ZHANG Runzhi, LIU Zhiqi. Effect of Final Cooling Temperature in Controlled Rolling and Cooling Process on Microstructure and Tensile Properties of High Strength Building Steel[J]. Materials and Mechanical Engineering, 2020, 44(7): 66-69. DOI: 10.11973/jxgccl202007014

Effect of Final Cooling Temperature in Controlled Rolling and Cooling Process on Microstructure and Tensile Properties of High Strength Building Steel

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  • Received Date: January 06, 2019
  • Revised Date: March 24, 2020
  • A high strength building steel was treated by controlled rolling and cooling process, and the effect of final cooling temperature (350-650 ℃) on the microstructure and tensile properties at room temperature of the steel was studied. The results show that the microstructure of the test steel after controlled rolling and cooling at final cooling temperature of 650 or 550 ℃ was bainite ferrite+martensite-austenite (M-A) island; the microstructure at final cooling temperature of 450 ℃ were still bainite ferrite+M-A island, but the content of M-A island was lower than that at final cooling temperature of 650 or 550 ℃; when the final cooling temperature was 350 ℃, the microstructure was mainly lath bainite ferrite, and a small amount of film-like M-A island distributed among local laths. The yield strength, tensile strength and yield ratio of the test steel increased with decreasing final cooling temperature, while the percentage elongation after fracture exceeded 16% at the final cooling temperature of 350 ℃ or 450 ℃ or 550 ℃. The tensile properties of the test steel met the requirements of 780 MPa grade high strength low yield ratio building steel when the final cooling temperature was 450 ℃; at this time the fine and round M-A island dispersed in the bainite ferrite, which was helpful to obtain high strength and plasticity and low yield ratio of the test steel.
  • [1]
    王丽丽,李萌,石丽辉.热处理对建筑用20MnV钢组织与性能的影响[J].材料热处理学报,2019,40(3):102-108.
    [2]
    王锋.建筑用抗震钢板的控轧控冷工艺与性能研究[J].热加工工艺,2018,47(11):124-127.
    [3]
    雷扬,李壮,王帅,等.TRIP钢控轧控冷参数对组织和性能的影响[J].金属热处理,2018,43(12):115-120.
    [4]
    王守忠,朱凯.终轧温度对Q420钢组织与力学性能的影响[J].商丘职业技术学院学报,2018,17(5):75-78.
    [5]
    王梅节,史红珺.热轧工艺参数对建筑钢屈强比的影响[J].铸造技术,2015,36(12):2975-2977.
    [6]
    刘曼,徐光,袁清,等.轧制压下量对低碳超细晶粒钢Q235B组织及性能的影响[J].特殊钢,2018,39(6):58-61.
    [7]
    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.
    [8]
    王丙兴,熊磊,张田,等.道次间冷却对厚板控制轧制变形行为的影响[J].钢铁,2017,52(9):60-65.
    [9]
    吴家福,钟丽琼. 工程机械用钢的轧制与冷却行为研究[J].铸造技术,2016,37(9):1827-1830.
    [10]
    康健,王昭东,王国栋,等.780 MPa级低屈强比高层建筑用钢的生产工艺研究[J].钢铁,2010,45(7):71-75.
    [11]
    BAIK S C, PARK S H, KWON O, et al. Effects of nitrogen on the mechanical properties of cold rolled TRIP-aided steel sheets[J]. Transactions of the Iron & Steel Institute of Japan, 2006, 46(4):599-605.
    [12]
    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.
    [13]
    程旭洋,辛宇,孙芳,等.热处理对建筑用高强韧钢板组织与力学性能的影响[J].热加工工艺,2018,47(22):209-213.

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