Effect of intercritical quenching process on microstructure and texture of Cr-Ti-B micro-carbon steel

doi:10.13251/j.issn.0254-6051.2023.08.012

Abstract

Abstract: Cr-Ti-B micro-carbon steel was intercritically quenched at different temperatures under heating rates of 10 ℃/s and 100 ℃/s, respectively, after reaching the temperature, held for 90 s. The effects of heating rate and quenching temperature on microstructure were analyzed, and the effect mechanism of phase transformation on matrix texture was also discussed. The results show that martensite exhibits island distribution at low intercritical quenching temperature (780 ℃) when heated at 10 ℃/s. With the increase of quenching temperature, the composite structure of martensite and bainite is observed. When heated at 100 ℃/s, martensite shows chain distribution at low intercritical quenching temperature (780 ℃), and martensite with network distribution appears with the increase of quenching temperature. The nucleation of austenite is obviously affected by heating rate. Nucleation occurs on the grain boundary of ferrite during slow heating, while nucleation occurs inside pearlite during rapid heating. The specimen heated at 10 ℃/s has strong γ texture and weak Goss texture when quenched at 830 ℃, while the specimen heated at 100 ℃/s has strong Goss texture and weak γ texture when quenched at 830 ℃. The selective phase transformation of {110} oriented grains during quenching is beneficial to weaken Goss texture.

Key words: Cr-Ti-B micro-carbon steel, heating rate, quenching temperature, martensite, nucleation of austenite, texture

CLC Number:

TG161

Liu Xuwei, Wang Zhigang, Lin Jie, Yin Tieqi, Ye Jieyun, Zhang Yinghui. Effect of intercritical quenching process on microstructure and texture of Cr-Ti-B micro-carbon steel[J]. Heat Treatment of Metals, 2023, 48(8): 72-79.

References

[1]Pan E, Di H, Jiang G, et al. Effect of heat treatment on microstructures and mechanical properties of hot-dip galvanized DP steels[J]. Acta Metallurgica Sinica, 2014, 27(3): 469-475.
[2]Zhang L, Wu D, Li Z. Influence of alloying elements on mechanical properties and corrosion resistance of cold rolled C-Mn-Si trip steels[J]. Journal of Iron and Steel Research International, 2012, 19(12): 42-47.
[3]Liu J, Zhang Z, Zhu F, et al. Effect of cooling method on microstructure and mechanical properties of hot-rolled C-Si-Mn trip steel[J]. Journal of Iron and Steel Research International, 2012, 19(1): 41-46.
[4]马鸣图, 吴宝榕. 双相钢-物理和力学冶金[M]. 北京: 冶金工业出版社, 1988.
[5]徐刚. 780 MPa级冷轧双相钢的组织与性能[J]. 钢铁研究学报, 2012, 24(8): 44-47.
Xu Gang. Microstructure and property of 780 MPa cold rolling dual-phase steel[J]. Journal of Iron and Steel Research, 2012, 24(8): 44-47.
[6]左秀荣, 陈蕴博, 王淼辉, 等. 铁素体/马氏体双相钢的组织及性能[J]. 材料热处理学报, 2010, 31(1): 29-34.
Zuo Xiurong, Chen Yunbo, Wang Miaohui, et al. Microstructure and mechanical properties of ferrite/martensite dual-phase steel[J]. Transactions of Materials and Heat Treatment, 2010, 31(1): 29-34.
[7]Klinkenberg C, Raabe D, Lücke K. Influence of intercritical annealing on the texture formation in low-carbon steel strips[J]. Steel Research, 1993, 64(5): 262-266.
[8]汪志刚, 叶洁云, 齐亮, 等. 相变对微碳Cr-Mo系深冲钢组织性能与织构的影响[J]. 材料热处理学报, 2016, 37(1): 119-125.
Wang Zhigang, Ye Jieyun, Qi Liang, et al. Effects of phase transformation on microstructure, properties and textures of micro-carbon deep drawing Cr-Mo steel[J]. Transactions of Materials and Heat Treatment, 2016, 37(1): 119-125.
[9]Emren F, Von Schlippenbach U, Lücke K. Investigation of the development of the recrystallization textures in deep drawing steels by ODF analysis[J]. Acta Metallurgica, 1986, 34(11): 2105-2117.
[10]Kestens L A I, Pirgazi H. Texture formation in metal alloys with cubic crystal structures[J]. Materials Science and Technology, 2016, 32(13): 1303-1315.
[11]Minami H, Okuda K, Kaneko S, et al. Effects of α+ γ intercritical and γ single-phase annealing on martensitic texture evolution in dual-phase steel sheets[J]. ISIJ International, 2018, 58(6): 1136-1145.
[12]Timokhina I B, Nosenkov A I, Humphreys A O, et al. Effect of alloying elements on the microstructure and texture of warm rolled steels[J]. ISIJ International, 2004, 44(4): 717-724.
[13]Mehdi M, He Y, Hilinski E J, et al. The origins of the Goss orientation in non-oriented electrical steel and the evolution of the Goss texture during thermomechanical processing[J]. Steel Research International, 2019, 90(7): 1800582.
[14]Hashimoto O, Satoh P, Tanaka T. Development of {111} texture in intercritical annealing of low carbon steels[J]. Transactions of the Iron and Steel Institute of Japan, 1987, 27(9): 746-754.
[15]Kalashami A G, Kermanpur A, Ghassemali E, et al. The effect of Nb on texture evolutions of the ultrafine-grained dual-phase steels fabricated by cold rolling and intercritical annealing[J]. Journal of Alloys and Compounds, 2017, 694: 1026-1035.
[16]Huang J, Poole W J, Militzer M. Austenite formation during intercritical annealing[J]. Metallurgical and Materials Transactions A, 2004, 35(11): 3363-3375.
[17]Zheng C, Raabe D. Interaction between recrystallization and phase transformation during intercritical annealing in a cold-rolled dual-phase steel: A cellular automaton model[J]. Acta Materialia, 2013, 61(14): 5504-5517.