轧制变形对 F-M 双相钢 0.05C-2.8Mn-4.2Ni-2Al- 1.2Mo-1.9Cu晶粒细化的影响

特殊钢 ›› 2022, Vol. 43 ›› Issue (3): 91-94.

轧制变形对 F-M 双相钢 0.05C-2.8Mn-4.2Ni-2Al- 1.2Mo-1.9Cu晶粒细化的影响

马才女¹，高雪云^1,2，呼陟宇¹，翟亭亭¹，李瑞红¹，王海燕^1,2，薛春江³

1内蒙古科技大学材料与冶金学院，包头014010,
2内蒙古自治区新金属材料重点实验室，包头014010；
3内蒙古科技大学工程训练中心，包头014010

收稿日期:2021-11-18 出版日期:2022-06-01 发布日期:2022-06-22
作者简介:马才女(1997-),女，硕士研究生,2019年辽宁工业大学(本科)毕业,先进金属材料研发。

Effect of Rolling Deformation on Grain Refinement of F-M Dual Phase Steel 0.05C-2.8Mn-4.2Ni-2Al-l. 2Mo-l. 9Cu

MA Cainv¹, GAO Xueyun^1,2, HU Zhiyu¹, ZHAI Tingting¹, LI Ruihong¹, WANG Haiyan^1,2, XUE Chunjiang³

1 School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010；
2 Inner Mongolia Autonomous Region Key Laboratory of Advanced Metal Materials, Baotou 014010；
3 Engineering Training Center, Inner Mongolia University of Science and Technology, Baotou 014010)

Received:2021-11-18 Published:2022-06-01 Online:2022-06-22

摘要/Abstract

摘要： 借助EBSD场发射扫描电子显微镜,研究了轧制变形及热处理后的铁素体/马氏体双相钢0.05C-2.8Mn4.2Ni-2Al-1.2Mo-1.9Cu显微组织演变及力学性能。结果表明,经900℃30%+780℃75%变形,500℃退火的F-M钢晶粒尺寸0.97μm,屈服、抗拉强度和延伸率分别为876 MPa,976 MPa和15.2%,经900℃30%+780℃50%变形,500℃退火的F-M钢晶粒尺寸1.54μm,屈服、抗拉强度和延伸率分别为801 MPa,895 MPa和19.4%。由轧制变形导致的晶粒细化、小角度晶界增多,是提高实验钢强度的主要原因。然而,较大的轧制变形量也使过多的小角度晶界阻碍位错运动,从而导致实验钢在塑性变形过程中,延展性略差。

Abstract: By field emission scanning electron microscope equipped with an EBSD imaging system the structure and properties of ferritic/martensitic dual-phase steel 0. 05C-2. 8Mn-4. 2Ni-2AJ-l. 2Mo-l. 9Cu after rolling deformation and heat treatment are studied. The results show that by rolled with 900 °C. 30% +780 °C 75% deforming and 500 °C. annealed, of F- M steel the grain size 0.97μm, yield tensile strength and elongation are respectively 876 MPa, 976 MPa and 15.2% , and by rolled with 900 °C 30% +780 °C 50% deforming and 500 °C annealed, of F-M steel the grain size 1.54 μm, yield、 tensile strength and elongation are respectively 801 MPa,895 MPa and 19. 4%. Hie grain refinement and the increase of small-angle grain boundaries caused by rolling deformation are the main reasons for improving the strength of the experimental steel. However, the large rolling deformation also makes too many small-angle grain boundaries hinder the movement of dislocations, which leads to more difficult deformation arid slightly poorer ductility in the plastic deformation process of the experimental steel.

马才女, 高雪云, 呼陟宇, 翟亭亭, 李瑞红, 王海燕, 薛春江. 轧制变形对 F-M 双相钢 0.05C-2.8Mn-4.2Ni-2Al- 1.2Mo-1.9Cu晶粒细化的影响[J]. 特殊钢, 2022, 43(3): 91-94.

MA Cainv, GAO Xueyun, HU Zhiyu , ZHAI Tingting, LI Ruihong, WANG Haiyan, XUE Chunjiang. Effect of Rolling Deformation on Grain Refinement of F-M Dual Phase Steel 0.05C-2.8Mn-4.2Ni-2Al-l. 2Mo-l. 9Cu[J]. Special Steel, 2022, 43(3): 91-94.

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