Effects of in situ formed TiCx on the microstructure, mechanical properties and abrasive wear behavior of a high chromium white iron

Jiang, Jipeng; Li, Shibo; Hu, Shujun; Zhou, Yang

doi:10.1016/j.matchemphys.2018.04.041

Cited by 34 publications

(4 citation statements)

References 44 publications

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“…In the modified microstructure of 20CrMnTi material, both a fine pearlite lamellar structure and fine cementite particles play a predominant role in the improvement of hardness and tensile strength. Our previous study also demonstrated that a fine and homogeneous microstructure containing both small TiC x and M 7 C 3 particles endows high Cr white iron greatly enhanced mechanical properties and wear resistance [20]. If the size of cementite particles increased, tensile strength decreased correspondingly, as shown in Figure 3a.…”

Section: Discussionmentioning

confidence: 76%

Improvement of Mechanical Properties of 20CrMnTi Steel through Microstructure Modification

Men

Lu³

et al. 2022

Coatings

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Microstructure modification is an effective approach to improve the mechanical properties of materials. In the present study, expanded graphite (EG) was added in a 20CrMnTi matrix to form pearlite microstructure and proeutectoid cementite after sintering. Mechanical alloying was used to obtain a fine milled mixture with a ball/powder weight ratio of 20:1. After mechanical alloying for 10 h, the milled mixtures with different EG contents were pressurelessly sintered at 1250 °C for 10 min and then hot-pressed at 1150 °C under 30 MPa for 30 min in Ar to obtain dense and modified 20CrMnTi materials. The content of EG has a profound influence on the microstructure and mechanical properties of 20CrMnTi. A high tensile strength of 1088 MPa and a high Vickers hardness of 4.7 GPa were achieved in the 1% EG-modified 20CrMnTi, which were increased by 105% and 28%, respectively, compared with the pure dense 20CrMnTi. The formed fine pearlite and small proeutectoid cementite in the modified microstructure contributed to the improved mechanical properties of 20CrMnTi.

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Section: Discussionmentioning

confidence: 76%

Improvement of Mechanical Properties of 20CrMnTi Steel through Microstructure Modification

Men

Lu³

et al. 2022

Coatings

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“…TiC is especially suitable for steel due to its high hardness (2859-3200 HV) [4], low density (≈4.93 g/cm 3 ), high melting point (≈3430 K), and high wear resistance [5,6]. The two main production methods of particle-reinforced steels could be classified into solid state (powder metallurgy [7], self-propagation high-temperature synthesis [8], mechanical alloying [9], and carbon-thermal reduction [10]) and molten/casting state methods (adding TiC to Fe-C [11,12], adding ferrotitanium to molten Fe-C [13,14], adding C to Fe-Ti [15], and adding Ti to molten Fe-C [16]). Furthermore, the TiC coating with high wear resistance can be obtained by laser cladding [17,18] or welding [19,20] on the surface of the material to achieve the purpose of protecting the material.…”

Section: Introductionmentioning

confidence: 99%

Effect of Solidification and Hot Rolling Processes on Wear Performance of TiC-Reinforced Wear-Resistant Steel

et al. 2022

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As a commonly reinforcing phase in wear-resistant materials, TiC is often added into wear-resistant materials to improve the wear resistance. The independently developed stepped molds with variable thicknesses were used to prepare the TiC-reinforced steels with the same composition though melt solidification processing to study the effect of the solidification rate on the particle size and wear performance. The effect of the hot rolling compression ratio on the particle size and wear performance was also studied. The length and aspect ratios of the particles in heat-treated TiC-reinforced steels with different billet thicknesses and rolling compression ratios were measured. With the increasing in the billet thickness and the decreasing in the rolling compression ratio, the length and aspect ratio of the particles increased in heat-treated TiC-reinforced steels, and the hardness decreased slightly. The three-body abrasive wear behavior of the TiC-reinforced steels was conducted using a standard dry sand rubber wheel wear testing procedure, and the modeling of the wear mechanism was established. The particle size is the main factor affecting wear resistance when the hardness of TiC-reinforced steels is similar. When the particles size is moderate, about 2–6 μm, the particle can break the sand tip and hinder the sand tip from sliding on the surface. In this manner, the mass loss decreased and the wear resistance improved. The large particles will be broken easily by the abrasive, and the small particles are removed easily by the abrasive in the wear process. So, the large and small particles cannot effectively prevent the damage of the abrasive to the matrix, and they have less of an effect on improving wear resistance.

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“…The wear resistance of hypereutectic Fe-Cr-C alloys mainly depends on the high-hardness strengthening phase, M 7 C 3 carbide, in its microstructure [5][6][7][8].Studies have found that the use of optimized alloy components [9][10][11][12] can refine the primary M 7 C 3 carbides and improve the wear resistance of hypereutectic Fe-Cr-C hardfacing alloys to a certain extent. Jiang et al [13] found that TiC can enhance the strength and wear resistance of Fe-Cr-C alloys. Under the action of an in situ-formed strengthening phase of TiC, the sizes of M 7 C 3 carbides were greatly reduced, the wear resistance of the alloy was considerably improved, and its mechanical properties were significantly enhanced.…”

Section: Introductionmentioning

confidence: 99%

Study of the wear resistance of Hypereutectic Fe–Cr–C Hardfacing Alloy reinforced with carbide particles

Wang

Liu

Xing

et al. 2022

Mater. Res. Express

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The microstructures and wear resistance of hypereutectic Fe-Cr-C hardfacing alloys reinforced with carbide particles was studied. The results showed that when the sizes of the M7C3 carbides were small, the wear resistance of the hardfacing alloy was considerably improved. During the wear process, the uniformly distributed small-sized carbides could also provide good support, and the uniform microstructure containing the fine M7C3 carbides could effectively reduce the force of the abrasive particles on the surface, evenly distribute the load, reduce the micro-cutting effect of the abrasive particles, and significantly improve the wear resistance of the hardfacing alloy. When the average size of the primary M7C3 carbides in the hardfacing alloy reached 0.5 μm, since the total volume fraction of the carbides of different sizes in the hardfacing alloy were basically the same, the reduction of the carbide size could significantly increase the phase interface of the M7C3 carbide and austenite. This could promote the occurrence of the M7C3→M23C6 transformation, forming a two-phase composite structure with hard-core M7C3 carbide and soft-shell M23C6 carbide. This structure could reduce the interfacial stress between the M7C3 carbide and austenite and improve the spalling resistance of the carbides in the hardfacing alloy.

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Effects of in situ formed TiCx on the microstructure, mechanical properties and abrasive wear behavior of a high chromium white iron

Cited by 34 publications

References 44 publications

Improvement of Mechanical Properties of 20CrMnTi Steel through Microstructure Modification

Improvement of Mechanical Properties of 20CrMnTi Steel through Microstructure Modification

Effect of Solidification and Hot Rolling Processes on Wear Performance of TiC-Reinforced Wear-Resistant Steel

Study of the wear resistance of Hypereutectic Fe–Cr–C Hardfacing Alloy reinforced with carbide particles

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