Study of microstructure, mechanical properties and impact-abrasive wear behavior of medium-carbon steel treated by quenching and partitioning (Q&amp;P) process

Lü, Jun; Yu, Hao; Kang, Pengfei; Duan, Xiaoyang; Song, Chenghao

doi:10.1016/j.wear.2018.07.026

Cited by 40 publications

(24 citation statements)

References 39 publications

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“…A comparison of the tensile strength and TE of other steels with microalloying elements (such as maraging steel [ 31 ], TWIP steel [ 32 ], TRIP steel [ 33 ], medium-Mn steel (MMS) [ 4 , 34 , 35 , 36 , 37 , 38 , 39 ], and QP steel [ 40 ]) and the present steel is shown in Figure 16 . It is obvious that the best combination of the strength and ductility of the studied steel is over 50 GPa·%.…”

Section: Discussionmentioning

confidence: 99%

Microstructure and Mechanical Properties of a Medium-Mn Steel with 1.3 GPa-Strength and 40%-Ductility

et al. 2021

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Steel designs with superior mechanical properties have been urgently needed in automotive industries to achieve energy conservation, increase safety, and decrease weight. In this study, the aging process is employed to enhance the yield strength (YS) by tailoring the distribution of V-rich precipitates and to improve ductility by producing high volume fractions of recrystallized ferrite in cold-rolled medium-Mn steel. A reliable method to acquire ultra-high strength (1.0–1.5 GPa), together with ductility (>40%), is proposed via utilizing non-recrystallized austenite and recrystallized ferrite. Similarly to conventional medium-Mn steels, the TRIP effect, along with the mild TWIP effect, is responsible for the main deformation mechanisms during tensile testing. However, the coupled influence of precipitation strengthening, grain refinement strengthening, and dislocation strengthening contributes to an increase in YS. The studied steel, aged at 650 °C for 5 h, demonstrates a YS of 1078 MPa, ultimate tensile strength (UTS) of 1438 MPa, and tensile elongation (TE) of 30%. The studied steel aged at 650 °C for 10 h shows a UTS of 1306 MPa and TE of 42%, resulting in the best product in terms of of UTS and TE, at 55 GPa·%. Such a value surpasses that of the previously reported medium-Mn steels containing equal mass fractions of various microalloying elements.

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Section: Discussionmentioning

confidence: 99%

Microstructure and Mechanical Properties of a Medium-Mn Steel with 1.3 GPa-Strength and 40%-Ductility

et al. 2021

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“…The role of retained austenite on wear resistance of nanostructured carbide-free bainitic steel was discussed by P. V. Moghaddam; the results indicated that better wear resistance was obtained because a higher work hardening capacity was increased with a high TRIP effect [ 18 ]. In addition, Q&P heat treatment was carried out to obtain the retained austenite, which contributes to high strength properties, and excellent wear resistance was caused by phase transformation of retained austenite [ 19 ]. In our previous works, a novel in situ VCp reinforced iron-based composite (VCFC) was designed based on the transformation-induced plasticity (TRIP) effect.…”

Section: Introductionmentioning

confidence: 99%

The Correlation Analysis of Microstructure and Tribological Characteristics of In Situ VCp Reinforced Iron-Based Composite

et al. 2021

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In this study, four kinds of heat treatments were performed to obtain a certain amount of retained austenite, which can result in good toughness and low brittleness accompanied with wear resistance of an in situ VC particle reinforced iron-based composite (VCFC). Microstructure, mechanical properties and wear resistance of the samples under heat treatment of QP, QPT, MQP and MQPT were compared. The experimental results indicated that there is a huge difference in microstructure between MQPT and the other heat treatments. High-proportion retained austenite and white net-like precipitates of M7C3 carbide existed in the MQPT-treated sample, but thick M7C3 carbide with brittleness was discovered in the other sample. Thereby, high-proportion retained austenite contributed to its low hardness of 634 HV and high tensile strength of 267 MPa, while a maximum hardness of 705.5 HV and a minimum tensile strength of 205 MPa were exhibited in the QPT-treated sample with a V-rich carbide of high hardness, a Cr-rich carbide of brittleness and a high-proportion martensite. Meanwhile, a phase transformation from retained austenite to martensite could increase the hardness and enhance wear resistance based on the transformation-induced plasticity (TRIP) effect; its wear rate was only 1.83 × 10−6 mm−3/(N·m). However, the wear rates of the samples under QP, QPT and MQP heat treatments increased by 16.4%, 44.3% and 41.0%, respectively. The wear mechanism was a synergistic effect of the adhesive wear mechanism and the abrasive wear mechanism. The adhesive wear mechanism was mainly considered in the MQPT-treated sample to reduce the wear rate attributed to high-proportion retained austenite and the existence of wear debris with a W element on the surface of the wear track. However, the abrasive wear mechanism could exist in the other samples because of a lot of thick, brittle M7C3, thereby resulting in a higher wear rate due to immediate contact between the designed material and the counterpart.

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“…[ 5–7 ] The tempering process improves the toughness with a small reduction in hardness; however, in most cases, the improvement of elongation and fracture toughness is limited. [ 8,9 ]…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Impact Wear Performances of Quenching and Partitioning and Quenching and Tempering Steels

Wei

Gan

Liu

et al. 2021

steel research int.

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A low‐carbon, high‐strength steel is treated by different quenching and partitioning (QP) and quenching and tempering (QT) routes in a salt bath furnace, and its wear performance is evaluated by impact abrasive wear tests. It is observed as compared with the traditional QT steel; the QP steel manifests better wear performance at the quenching temperature of 220 °C. Stable film‐like retained austenite (RA) and fine martensite laths improve the wear resistance of the QP steel at the quenching temperature of 220 °C, whereas unstable blocky RA formed in the QP steel at the quenching temperature of 190 °C decrease the wear resistance. In addition, the lower critical impact stress for crack initiation at the higher impact energy decreases the wear resistance; however, the relative wear resistance is improved greatly at the higher impact energy due to the better fracture toughness of the QP steel. Moreover, the correlation of wear loss, hardness, and KIC is modeled to compare the wear resistances of the test steel after different heat treatments.

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Study of microstructure, mechanical properties and impact-abrasive wear behavior of medium-carbon steel treated by quenching and partitioning (Q&P) process

Cited by 40 publications

References 39 publications

Microstructure and Mechanical Properties of a Medium-Mn Steel with 1.3 GPa-Strength and 40%-Ductility

Microstructure and Mechanical Properties of a Medium-Mn Steel with 1.3 GPa-Strength and 40%-Ductility

The Correlation Analysis of Microstructure and Tribological Characteristics of In Situ VCp Reinforced Iron-Based Composite

Comparison of the Impact Wear Performances of Quenching and Partitioning and Quenching and Tempering Steels

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