The Effect of Vanadium and Titanium on Mechanical Properties of Microalloyed PM Steel

Gündüz, Süleyman; Erden, Mehmet Akif; Karabulut, Hasan; Türkmen, Mustafa

doi:10.1007/s11106-016-9803-2

Cited by 18 publications

(11 citation statements)

References 26 publications

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“…The volume fraction of ferrite and pearlite were determined by using a systematic point counting method on etched metallographic specimen at appropriate magnifications. [27][28][29] According to the pointcounting method, the grid points that fall in the ferrite and pearlite region are divided by the total number of grid points. When the grid points intersect the ferrite boundary, they are counted as half.…”

Section: Workpiece Materialsmentioning

confidence: 99%

Examining the machinability of 38MnVS6 microalloyed steel, cooled in different mediums after hot forging with the coated carbide and ceramic tool

Özlü

Demir

Türkmen

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this study, the effect of the microstructure, hardness, and cutting speed on main cutting force and surface roughness in medium carbon microalloyed steel cooled in different mediums after hot forging, was investigated. As-received sample, which was not hot forged, and the samples cooled in the sand, air, oil, and polymerized water after hot forging were used for the experimental studies. The machinability tests were performed via turning method by using coated carbide and coated ceramic cutting tools with five cutting speed (120, 150, 180, 210, and 240 m/min), constant feed rate (0.04 mm/rev), and constant depth of cut (0.6 mm). The microstructure examinations of the samples were carried out and their hardness values were determined. Also, the wear of cutting tools were examined with scanning electron microscope. In the experimental study, it was revealed that the microstructure, hardness and cutting speed had a significant effect on the surface roughness values of the samples cooled in dissimilar environments following forging. Moreover, the samples cooled in air and polymerized water, whose hardness increased depending on the increase in the cooling rate, had the highest cutting force after machining by using the coated carbide and ceramic tool.

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Section: Workpiece Materialsmentioning

confidence: 99%

Examining the machinability of 38MnVS6 microalloyed steel, cooled in different mediums after hot forging with the coated carbide and ceramic tool

Özlü

Demir

Türkmen

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…In the addition of 4% and 5% Mo, a rise in number of pores and fall in the bainite phase was detected as a result of the excessive formation of MoC (N) deposits in the grain boundaries of Mo in the structure, and it is thought to affect the mechanical properties. Though porosity is not good for strength [14][15][16][17][18][19], the current study got small and spherical pores which are not adversarial to the strength of the current material. As seen in Table 3, the theoretical density before sintering, density and porosity after sintering were calculated.…”

Section: Microstructure and Mechanical Properties Of Mo-added Pm Steelmentioning

confidence: 80%

“…In the literature, there are some studies about PM steel production and microstructure mechanical property relationship. For example, Erden et al [17] created V and Ti micro-alloyed steel with PM technique. They explored the sintering process by keeping it for 60 min.…”

Section: Introductionmentioning

confidence: 99%

Investigation of microstructure, mechanical and machinability properties of Mo-added steel produced by powder metallurgy method

Erden

Yaşar

Korkmaz

et al. 2021

Int J Adv Manuf Technol

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This study presents the impact of molybdenum (Mo) inclusion on microstructure, mechanical, and machinability behavior of steels manufactured with powder metallurgy (PM) approach. PM steel samples with different molybdenum ratios were pressed at 750-MPa pressing pressure and sintered in the atmosphere-controlled tube furnace at 1400°C for 1 h. While particle size and distribution of phases of PM steels with different molybdenum ratios were determined by optical microscope, mechanical properties were determined by applying tensile test. The results were observed that 3% Mo weight-added steel displayed the maximum yield and tensile strength. In addition, the machinability properties of 3% Mo-added steel, which has the highest yield and tensile strength, were investigated. In this work, we researched the thrust force and surface roughness as machinability output, and drilling parameters on the output were determined by utilizing analysis of variance. Finally, SEM images were taken from the inner surfaces of the machined holes and the fractured surfaces from tensile test, and information about the machinability of this alloy produced with PM was presented. As a result, an increase in yield and tensile strength and a reduction in strain were identified with the increase in Mo content. Moreover, the coated cutting tools are better on the machining output than the uncoated cutting tools in terms of green environment. The most important factors on the Fz and Ra are the coating condition and the feed rate with 56.53% and 43.62% PCR, respectively.

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“…These precipitates inhibit grain growth in the austenite zone and promote the formation of small ferrite grains during austenite-ferrite transformation. This group of alloy steels exhibits improved mechanical properties, including precipitation hardening, grain size reduction, enhanced wear resistance mechanisms, and increased hardness resistance [39][40][41][42][43]. The ferritic + pearlitic grain matrix also affects the mechanical behaviour of this steel.…”

Section: Resultsmentioning

confidence: 99%

Determination of wear resistance of nickel-carbide alloy coating by atmospheric plasma spray technique on 30MnB5 alloy steel used in cultivator blades

Dilay

2023

Mater. Res. Express

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The wear that occurs during tillage in agricultural machinery shortens the material’s life and increases costs. This study investigated the microstructure and morphology of cultivator blades coated with atmospheric plasma spray (APS) process and tested under real field conditions using OM, SEM, EDX, and XRD techniques. Abrasion tests were conducted in an area of 110 hectares and under two different soil moisture conditions. Material properties were investigated using hardness and surface roughness tests. The coating process was successful both mechanically and metallurgically by applying Ni-WC ceramic-metal (cermet) powder on the surface of 30MnB5 steel substrate with APS. The oxide and carbide structures detected on the coating surface by XRD studies resulted in a 1.5 times higher coating hardness. Due to the hard carbide phases in the coating matrix, the grooves on the wear surfaces were shallow and narrow compared to the substrate sample. The surface roughness values of the coated sample were approximately two times higher than the substrate sample. Due to the microstructure and high hardness, the coated specimen experienced three times less abrasion in both humidity conditions. The APS method can be successfully applied to the machined parts of tillage machines. In the near future, the cost of agricultural production can be reduced, and the environment can benefit from this method. In conclusion, this study presents a feasible approach to improving the wear resistance of Ni-WC ceramic-metal alloy by plasma spray coating under real field conditions.

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The Effect of Vanadium and Titanium on Mechanical Properties of Microalloyed PM Steel

Cited by 18 publications

References 26 publications

Examining the machinability of 38MnVS6 microalloyed steel, cooled in different mediums after hot forging with the coated carbide and ceramic tool

Examining the machinability of 38MnVS6 microalloyed steel, cooled in different mediums after hot forging with the coated carbide and ceramic tool

Investigation of microstructure, mechanical and machinability properties of Mo-added steel produced by powder metallurgy method

Determination of wear resistance of nickel-carbide alloy coating by atmospheric plasma spray technique on 30MnB5 alloy steel used in cultivator blades

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