方坯直轧工艺对钢筋组织和性能差异性的影响

doi:10.13228/j.boyuan.issn0449-749x.20180183

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1608 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要方坯直轧工艺是棒线材轧制生产未来发展趋势，该工艺是指通过提高连铸机钢坯温度并将高温钢坯直接送入轧机进行轧制的新工艺。为了掌握方坯直轧工艺对HRB400钢筋组织和性能差异性的影响，运用有限元方法对方坯轧制过程进行模拟。研究了方坯直轧工艺对定尺长度为9 m的钢筋内各相体积分数及晶粒尺寸分布的影响，同时结合力学本构方程预测了钢筋的力学性能。结果表明，方坯直轧工艺生产的钢筋微观组织主要由铁素体、珠光体和微量贝氏体构成，其平均体积分数分别为61.4%、38.4%和0.2%，相比于传统热轧工艺，方坯直轧工艺可实现提高珠光体体积分数、降低铁素体体积分数的作用；方坯直轧工艺可使钢筋在轴向上的晶粒尺寸分布存在一定差异，钢筋头部、中部和尾部区域的晶粒尺寸平均值分别为7.4、7.9和8.5 μm；另外，钢筋屈服强度的上限值和下限值分别为454和449 MPa，说明9 m的钢筋头尾屈服强度相差5 MPa，其力学差异性不可忽略。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	刘鑫
	冯光宏
	张宏亮
	齐渊洪

关键词 ：数值模拟, 相体积分数, 晶粒尺寸, 方坯直轧, 力学性能

Abstract：The billet direct rolling process is the trend of the future development of rod and wire rolling production which refers to a new process in which the high temperature billet is directly fed into the mill for rolling by increasing the casting billet temperature of the caster. The finite element method（FEM） was adopted to simulate the rolling process of billet and to determine the effect of billet direct rolling process on the difference of microstructure and mechanical properties of a HRB400 rebar. The effect of billet direct rolling process on the volume fraction of each phase and grain size distribution of the rebar with a cut-lengths of 9 m was calculated，and the mechanical properties of rebar were predicted with the constitutive equation of mechanical properties. The results showed that the microstructure of rebar produced by billet direct rolling process was mainly composed of ferrite，pearlite and trace bainite，of which the average volume fraction was 61.4%，38.4% and 0.2%，respectively. Compared with the traditional hot rolling process，the billet direct rolling process could increase the volume fraction of pearlite and reduce the ferrite volume fraction. There were some differences in the axial distribution of the grain size of the rebar produced by the billet direct rolling process，the average grain size in the head region，the middle region and the tail region of the rebar were 7.4，7.9 and 8.5 μm，respectively. In addition，the upper limit value of the yield strength of the rebar was 454 MPa，and the lower limit value was 449 MPa，which showed that the yield strength difference between the head region and the tail region of the rebar with a cut-lengths of 9 m produced by direct rolling process was about 5 MPa，and the difference of mechanical properties could not be ignored.

Key words： numerical simulation phase volume fraction grain size billet direct rolling mechanical properties

收稿日期: 2018-05-09 出版日期: 2018-12-24

PACS:

TG142.1

引用本文:

刘鑫，冯光宏，张宏亮，齐渊洪. 方坯直轧工艺对钢筋组织和性能差异性的影响[J]. , 2018, 53(12): 86-93. LIU Xin，FENG Guang-hong，ZHANG Hong-liang，QI Yuan-hong. Effect of billet direct rolling process on difference in microstructure and mechanical properties of rebar. Iron and Steel, 2018, 53(12): 86-93.

链接本文:

http://www.chinamet.cn/Jweb_gt/CN/10.13228/j.boyuan.issn0449-749x.20180183 或 http://www.chinamet.cn/Jweb_gt/CN/Y2018/V53/I12/86

[1]	F.设备的最新进展和使用效果[J].钢铁, 2005, 40(6):80-83
[1]	F.设备的最新进展和使用效果[J].钢铁, 2005, 40(6):80-83
[2]	罗光政, 刘鑫, 范锦龙, 等.棒线材免加热直接轧制技术研究[J].钢铁研究学报, 2014, 26(2):13-16
[2]	罗光政, 刘鑫, 范锦龙, 等.棒线材免加热直接轧制技术研究[J].钢铁研究学报, 2014, 26(2):13-16
[3]	LIU Xin, FENG Guang-hong, QI Yuan-hong.The effect of direct rolling of without-heating process on the microstructure and properties of a 400 MPa rebar[C]. // IOP Conference Series: Materials Science and Engineering. Korea, 2018, 317(1): 012003.
[3]	LIU Xin, FENG Guang-hong, QI Yuan-hong.The effect of direct rolling of without-heating process on the microstructure and properties of a 400 MPa rebar[C]. // IOP Conference Series: Materials Science and Engineering. Korea, 2018, 317(1): 012003.
[4]	王国栋.近年我国轧制技术的发展、现状和前景[J].轧钢, 2017, 34(1):1-8
[4]	王国栋.近年我国轧制技术的发展、现状和前景[J].轧钢, 2017, 34(1):1-8
[5]	刘相华, 王赛, 王吉等.工艺中轧件头尾温差与组织性能均匀性控制[J].轧钢, 2016, 33(5):1-5
[5]	刘相华, 王赛, 王吉等.工艺中轧件头尾温差与组织性能均匀性控制[J].轧钢, 2016, 33(5):1-5
[6]	郝晋阳, 冯光宏, 张宏亮.连铸方坯直接轧制温度场及产品性能研究[J].钢铁钒钛, 2016, 37(3):119-123
[6]	郝晋阳, 冯光宏, 张宏亮.连铸方坯直接轧制温度场及产品性能研究[J].钢铁钒钛, 2016, 37(3):119-123
[7]	刘相华, 刘鑫, 陈庆安, 等.棒线材免加热直接轧制的特点和关键技术[J].轧钢, 2016, 33(1):1-4
[7]	刘相华, 刘鑫, 陈庆安, 等.棒线材免加热直接轧制的特点和关键技术[J].轧钢, 2016, 33(1):1-4
[8]	刘相华, 查显文, 赵启林, 等.棒线材生产技术的发展前景展望[J].轧钢, 2016, 33(6):1-5
[8]	刘相华, 查显文, 赵启林, 等.棒线材生产技术的发展前景展望[J].轧钢, 2016, 33(6):1-5
[9]	LUO Guang-zheng, LIU Xin, ZHI Ying.Simulation to the Temperature Field for Continuous Casting Billet during Direct Rolling of Free-Heating[J][J].Advanced Materials Research, 2014, 941-944:1890-1894
[9]	LUO Guang-zheng, LIU Xin, ZHI Ying.Simulation to the Temperature Field for Continuous Casting Billet during Direct Rolling of Free-Heating[J][J].Advanced Materials Research, 2014, 941-944:1890-1894
[10]	刘相华, 陈庆安, 刘鑫, 等.棒线材免加热直接轧制工艺的平面布置[J].轧钢, 2016, 33(2):1-4
[10]	刘相华, 陈庆安, 刘鑫, 等.棒线材免加热直接轧制工艺的平面布置[J].轧钢, 2016, 33(2):1-4
[11]	刘相华, 曹燕, 刘鑫, 等.棒线材免加热工艺中的铸坯提温与保温技术[J].轧钢, 2016, 33(3):8-11
[11]	刘相华, 曹燕, 刘鑫, 等.棒线材免加热工艺中的铸坯提温与保温技术[J].轧钢, 2016, 33(3):8-11
[12]	刘相华, 马宝国, 吴志强, 等.棒线材免加热工艺中的切坯送坯节奏控制[J].轧钢, 2016, 33(4):1-5
[12]	刘相华, 马宝国, 吴志强, 等.棒线材免加热工艺中的切坯送坯节奏控制[J].轧钢, 2016, 33(4):1-5
[13]	LIU Xin, SU Lie, LIU Xiang-hua.Effect of DROF process on the temperature field and roll force[J].[J].Advanced Materials Research, 2014, 941-944:1885-1889
[13]	LIU Xin, SU Lie, LIU Xiang-hua.Effect of DROF process on the temperature field and roll force[J].[J].Advanced Materials Research, 2014, 941-944:1885-1889
[14]	曹大报.HRB400热轧钢筋再结晶及相变动力学研究[D]. 马鞍山: 安徽工业大学, 2017.
[14]	曹大报.HRB400热轧钢筋再结晶及相变动力学研究[D]. 马鞍山: 安徽工业大学, 2017.
[15]	Pietrzyk M, Roucoules C, Hodgson P D.Modelling the Thermomechanical and Microstructural Evolution During Rolling of a Nb HSLA Steel[J].ISIJ International, 1995, 35(5):531-541
[15]	Pietrzyk M, Roucoules C, Hodgson P D.Modelling the Thermomechanical and Microstructural Evolution During Rolling of a Nb HSLA Steel[J].ISIJ International, 1995, 35(5):531-541
[16]	Beynon J H, Sellars C M.Modelling Microstructure and Its Effects during Multipass Hot Rolling[J].ISIJ International, 1992, 32(3):359-367
[16]	Beynon J H, Sellars C M.Modelling Microstructure and Its Effects during Multipass Hot Rolling[J].ISIJ International, 1992, 32(3):359-367
[17]	Wang S R, Tseng A A.Macro- and micro-modelling of hot rolling of steel coupled by a micro-constitutive relationship[J].Materials & Design, 1995, 16(6):315-336
[17]	Wang S R, Tseng A A.Macro- and micro-modelling of hot rolling of steel coupled by a micro-constitutive relationship[J].Materials & Design, 1995, 16(6):315-336
[18]	Siwecki T.Modelling of Microstructure Evolution during Recrystallization Controlled Rolling[J].ISIJ International, 1992, 32(3):368-376
[18]	Siwecki T.Modelling of Microstructure Evolution during Recrystallization Controlled Rolling[J].ISIJ International, 1992, 32(3):368-376