Transactions of Materials and Heat Treatment

Title：Influence of quenching and tempering process on organization and mechanical properties for hot-rolled high-strength steel

Authors： Yu Yongmei1 Xiong Fanhao1 Li Zhiguo2

Unit： 1. School of Mechanical and Power Engineering Shenyang Chemical University 2. Hualu Forging Machine Co. Ltd.

KeyWords： hot-rolled high-strength steel quenching and tempering microstructure evolution mechanical properties strength and plasticity

ClassificationCode：TG161

year,vol(issue):pagenumber：2025,50(7):219-226

Abstract：

The hot-rolled high-strength steel was subjected to quenching and tempering treatment at different temperatures by salt bath experiments, and the microstructure evolution and mechanical properties of the experimental steel were detected. The results show that under the quenching and tempering process, with the increasing of annealing temperature, the martensite content increases, the ferrite content decreases, and the residual austenite decreases. The “double quenching and tempering” process is used to refine the grains, and with the increasing of tempering temperature, the tempering degree of martensite increases, and the content of bainite and residual austenite increases. Compared with the quenching and tempering process, the residual austenite content of the “double quenching and tempering” process is increased, the elongation is increased by 4%, and the impact toughness is significantly improved, but the yield strength and tensile strength are decreased by 345 and 220 MPa, respectively. In the case of “double quenching and 400 ℃ tempering”, the experiment steel obtains the optimal match of strength and plasticity. At this time, the yield strength and tensile strength are 660 and 995 MPa, respectively, the elongation is 26.9%, and the impact energies at -20 and -40 ℃ are 84.06 and 65.23 J, respectively.

Funds：

国家自然科学基金面上资助项目（51974085）

作者简介：于永梅（1974-）女，博士，副教授，硕士生导师 E-mail：Yongmei_yu@126.com 通信作者：李治国（1998-），男，硕士研究生 E-mail：2106751839@qq.com

Reference：

[1]Edmonds D V, He K, Rizzo F C, et al. Quenching and partitioning martensite-A novel steel heat treatment[J]. Materials Science & Engineering A, 2006, 438: 25-34.

[2]Clarke A J, KlemmToole J, Clarke K D, et al. Perspectives on quenching and tempering 4340 steel[J]. Metallurgical and Materials Transactions A, 2020,51(10):4984-5005.

[3]Morsdorf L, Kashiwar A, Kubel C, et al. Carbon segregation and cementite precipitation at grain boundaries in quenched and tempered lath martensite[J]. Materials Science & Engineering, A, 2023，862：144369.

[4]徐建新，崔勇志，刘兵飞. 温度循环对30CrMnSiNi2A钢力学性能的影响[J]. 锻压技术，2023，48（3）：201-210.

Xu J X，Cui Y Z，Liu B F. Influence of temperature cycle on mechanical properties of 30CrMnSiNi2A steel[J]. Forging & Stamping Technology，2023，48（3）：201-210.

[5]孔玉强,李伟,段朋.预应变对高强度低合金钢性能和组织的影响[J].锻压技术,2024,49(4):219-225.

Kong Y Q，Li W，Duan P. Influence of prestrain on properties and microstructure for high strength low alloy steel[J]. Forging & Stamping Technology，2024，49(4)：219-225.

[6]覃展鹏,王红鸿,童志,等. 亚温淬火工艺对低碳低合金高强钢组织及性能的影响[J]. 材料热处理学报, 2017, 38(9): 142-147.

Tan Z P, Wang H H, Tong Z, et al. Effect of subtemperature quenching process on the microstructure and properties of lowcarbon lowalloy highstrength steel[J]. Transactions of Materials and Heat Treatment,2017, 38(9): 142-147.

[7]Ji L, Tan Z L, Zhang M, et al. Effect of intercritical austenitizing temperature during quenchingintercritical quenchingtempering process on toughness of 25Mn2Si2Cr bainitic steel[J]. Steel Research International, 2019, 90(6): 1800573.

[8]Saastamoinen A, Kaijalainen A, Heikkala J, et al. The effect of tempering temperature on microstructure, mechanical properties and bendability of directquenched lowalloy strip steel[J]. Materials Science & Engineering A, 2018, 730(22): 284-294.

[9]Wen Z R, Gan X L, Liu M, et al. Comparison of the impact wear performances of quenching and partitioning and quenching and tempering steels[J]. Steel Research International, 2021, 92(11): 2100325.

[10]张蒙. 两相区淬火-回火对NM500耐磨钢组织及性能的影响[D]. 长沙：中南大学, 2024.

Zhang M. Effect of Quenchingtempering in Twophase Zone on the Organization and Properties of NM500 Wearresistant Steel[D]. Changsha:Central South University, 2024.

[11]郎雪琴, 代琨. 亚温淬火回火的30CrMoA钢的显微组织和力学性能[J]. 热处理, 2023, 38(4): 44-45.

Lang X Q, Dai K. Microstructure and mechanical properties of subtemperature quenched and tempered 30CrMoA steel[J]. Heat Treatment, 2023, 38(4): 44-45.

[12]邓鹏. 超高强Q&P钢轧制、退火工艺与组织性能研究[D]. 沈阳：东北大学, 2018.

Deng P. Research on Rolling and Annealing Process and Organizational Properties of Ultrahighstrength Q&P Steel[D]. Shenyang:Northeastern University, 2018.

[13]胡斌. 低碳高强钢中残余奥氏体的成分精细调控及稳定性研究[D]. 北京：北京科技大学, 2022.

Hu B. Compositional Fine Tuning and Stability Study of Residual Austenite in Low Carbon High Strength Steels[D]. Beijing:University of Science and Technology Beijing, 2022.

[14]Peng F, Xu Y B, Gu X L, et al. The relationships of microstructuremechanical properties in quenching and partitioning (QP) steel accompanied with microalloyed carbide precipitation[J]. Materials Science & Engineering A, 2018, 723: 247-258.

[15]GB/T 228.1—2021，金属材料拉伸试验第1部分:室温试验方法[S].

GB/T 228.1—2021，Metallic materials—Tensile testing—Part 1: Method of test at room temperature[S].

[16]GB/T 229—2020，金属材料夏比摆锤冲击试验方法[S].

GB/T 229—2020，Metallic materials—Charpy pendulum impact test method[S].

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