Effect of the M (Ti, V, Nb) C Precipitation Affected by Nitrogen Addition on and Mechanical and Frictional Wear Properties in High Manganese Steel

Fu, Hao; Zhang, Fei; Zhang, Wen; Zhang, Tianyi; Huang, Xiedong; Chen, Peng; Wu, Hong; Li, Zulai; Shan, Quan

doi:10.2139/ssrn.4333723

Cited by 2 publications

(2 citation statements)

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“…One of such steel grades, meeting mentioned demands and properties, are austenitic high-manganese steels [3][4][5]. These steels most often consist of 0.02% to 0.65% C, 15% to 30% Mn and Al and Si with various concentrations [6][7][8][9], in some cases also Cr or microaddtions Nb and Ti [10][11]. Gradual course of strain induced martensitic transformation [12][13][14] and/or mechanical twinning [15][16][17][18] guarantees obtaining a particularly good combination of high strength and plasticity (YS 0.2 = 250/450 MPa; UTS = 600/900 MPa; UEl = 40/80%).…”

Section: Introductionmentioning

confidence: 99%

Hot Ductility of High-Mn Steel with Niobium and Titanium

Opiela,

Fojt-Dymara

2024

Adv. Sci. Technol. Res. J.

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The work presents the results of research on the effect of deformation parameters on hot ductility of high-Mn austenitic steel with niobium and titanium. The investigations were carried out on steel with 0.05% C, 24% Mn, 3.5% Si, 1.5% Al, 0.030% Nb and 0.075% Ti. Hot static tensile test was performed using Gleeble 3800 thermomechanical simulator. Samples were deformed in a temperature range from 1050 °C to 1200 °C with a strain rate of 3•10 -3 s -1 . The reduction in area (RA), determined in the static tensile test, was the basis for determining the hot ductility of the examined steel. Reduction in area of examined steel decreases from 88% at the temperature of 1050 °C to 59% at 1200 °C. High hot ductility of the investigated steel is the result of the synergy of chemical composition optimization, properly conducted modification of non-metallic inclusions and formed fine-grained microstructure of dynamically recrystallized austenite. In addition to hot ductility, parameters characterizing susceptibility of studied steel to high temperature cracking were also defined, namely: ductility recovery temperature (DRT), nil ductility temperature (NDT) and nil strength temperature (NST) were determined. The values of these temperatures are 1240 °C, 1250 °C and 1270 °C, respectively. This means that the temperature of the beginning of plastic deformation of ingots of this steel may be equal even slightly above 1200 °C. In addition, the high-temperature brittleness range (HTBR) was determined, which is equal 30 °C.

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Section: Introductionmentioning

confidence: 99%

Hot Ductility of High-Mn Steel with Niobium and Titanium

Opiela,

Fojt-Dymara

2024

Adv. Sci. Technol. Res. J.

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“…However, excessive large precipitation can harm the plasticity and toughness of steel, so the content of Ti should not be too high. And experts have proposed that the introduction of nitrogen to steel could effectively reduce the size of precipitates, enhanced the stability of carbides, and regulated the dispersion of carbides [21,22], which was attributed to the formation of TiN with Ti at high temperatures, it could act as a heterogeneous nucleation point, improving the nucleation rate and re ning TiC [23]. In addition, nanoscale and submicron-scale VC and NbC could precipitate uniformly in the matrix during aging at lower temperatures.…”

Section: Introductionmentioning

confidence: 99%

Ti-V-Nb precipitation refinement via aging time modification for wear resistance improving in nitrogen micro-alloyed high manganese steels

Cao,

Chen,

Chen

et al. 2023

Preprint

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It is very beneficial for wear resistance improving how to acquire refined precipitates with diffuse distribution. In high manganese cast steels, Ti-V-Nb microalloying is a useful method to promote carbide and carbonitride precipitating, and the nitrogen addition could accelerate the precipitation. Therefore, Aging time modification is a practical option to implement the precipitation strength and wear resistance of micro-alloyed high manganese steels. In this work, the quantities and distribution of precipitates were collaboratively regulated by Ti-V-Nb-N microalloying and aging time variations (water quenching at 1100°C followed by holding at 400°C for 24, 60, and 84 hours, respectively, designated AT24, AT60, and AT84) to improve the wear resistance of manganese steels. The results have shown that solid solution aging treatment could effectively refine micron-sized precipitates in high manganese steels compared to as-cast (AS) steels while inducing the precipitation of nanoscale precipitates. With increasing aging time, the number of nanoscale precipitates increased and then decreased, and the nanoscale precipitates were most numerous and uniformly distributed in AT60, which exhibited the most excellent comprehensive mechanical properties. Refined micron-size precipitates cooperating with diffusely distributed nanoscale precipitates increased the matrix resistance to abrasives resulting in less wear weight loss and improved wear resistance of AT60. Compared to as-cast steel, the wear mechanisms of the tested steels were transformed from wide and deep pits to shallow grooves and micro-cutting by prolonging the aging time.

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Effect of the M (Ti, V, Nb) C Precipitation Affected by Nitrogen Addition on and Mechanical and Frictional Wear Properties in High Manganese Steel

Cited by 2 publications

References 0 publications

Hot Ductility of High-Mn Steel with Niobium and Titanium

Hot Ductility of High-Mn Steel with Niobium and Titanium

Ti-V-Nb precipitation refinement via aging time modification for wear resistance improving in nitrogen micro-alloyed high manganese steels

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