Effect of Nb micro-alloying on microstructure and properties of thermo-mechanically processed high carbon pearlitic steel

Dey, Indrajit; Chandra, Sowmendra Nath; Saha, Rajib; Ghosh, S. K.

doi:10.1016/j.matchar.2018.03.038

Cited by 40 publications

(22 citation statements)

References 35 publications

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“…In the present work, we refer to these microstructures as polygonal ferrite (PF, featureless gray regions), degenerated pearlite (DP, arrow highlighted bright region) and degenerated upper bainite (DUB, ellipse highlighted regions with fine substructure). The designations polygonal ferrite, degenerated pearlite and degenerated upper bainite and their abbreviations PF, DP and DUB are used as proposed by Zajac et al [19] and have been frequently adapted by many researchers such as [11,[31][32][33][34]. Figures 3a and b show that the PF and DP volume fractions decrease as b increases from 0.5 K/s to 1 K/s.…”

Section: Microstructural Features Observed By Semmentioning

confidence: 99%

Effect of cooling rate on the microstructure and mechanical properties of a low-carbon low-alloyed steel

Wang

Cao

et al. 2021

J Mater Sci

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Heavy plate steels with bainitic microstructures are widely used in industry due to their good combination of strength and toughness. However, obtaining optimal mechanical properties is often challenging due to the complex bainitic microstructures and multiple phase constitutions caused by different cooling rates through the plate thickness. Here, both conventional and advanced microstructural characterization techniques which bridge the meso- and atomic-scales were applied to investigate how microstructure/mechanical property-relationships of a low-carbon low-alloyed steel are affected by phase transformations during continuous cooling. Mechanical tests show that the yield strength increases monotonically when cooling rates increase up to 90 K/s. The present study shows that this is associated with a decrease in the volume fraction of polygonal ferrite (PF) and a refinement of the substructure of degenerated upper bainite (DUB). The fine DUB substructures feature C-rich retained austenite/martensite-austenite (RA/M-A) constitutes which decorate the elongated micrograin boundaries in ferrite. A further increase in strength is observed when needle-shaped cementite precipitates form during water quenching within elongated micrograins. Pure martensite islands on the elongated micrograin boundaries lead to a decreased ductility. The implications for thick section plate processing are discussed based on the findings of the present work.

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Section: Microstructural Features Observed By Semmentioning

confidence: 99%

Effect of cooling rate on the microstructure and mechanical properties of a low-carbon low-alloyed steel

Wang

Cao

et al. 2021

J Mater Sci

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“…It is stated in many papers [18][19][20][21][22][23][24] that chemical composition, pollution of steel by non-metallic inclusions, results of liquation processes, presence of scale on the surface of rod and its decarburization, and the peculiarities of macro and microstructure have a great influence on the processability of steel rod in the following operations of technology: rough drawing, patenting, drawing of brass-plated wire, and laying, as well as the quality of the final product.…”

Section: Steel Rod For High-strength Wire Manufacturingmentioning

confidence: 99%

Automobile Tires’ High-Carbon Steel Wire

Polyakova

Stolyarov

2021

Encyclopedia

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It is a well-known fact that to manufacture an automobile tire more than 200 different materials are used, including high-carbon steel wire. In order to withstand the affecting forces, the tire tread is reinforced with steel wire or other products such as ropes or strands. These ropes are called steel cord. Steel cord can be of different constructions. To ensure a good adhesive bond between the rubber of the tire and the steel cord, the cord is either brass-plated or bronzed. The reason brass or bronze is used is because copper, which is a part of these alloys, makes a high-strength chemical composition with sulfur in rubber. For steel cord, the high carbon steel is usually used at 0.70–0.95% C. This amount of carbon ensures the high strength of the steel cord. This kind of high-quality, unalloyed steel has a pearlitic structure which is designed for multi-pass drawing. To ensure the specified technical characteristics, modern metal reinforcing materials for automobile tires, metal cord and bead wire, must withstand, first of all, a high breaking load with a minimum running meter weight. At present, reinforcing materials of the strength range 2800–3200 MPa are increasingly used, the manufacture of which requires high-strength wire. The production of such wire requires the use of a workpiece with high carbon content, changing the drawing regimes, patenting, and other operations. At the same time, it is necessary to achieve a reduction in the cost of wire manufacturing. In this context, the development and implementation of competitive processes for the manufacture of high-quality, high-strength wire as a reinforcing material for automobile tires is an urgent task.

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“…This is attributed to that when the cooling rate increased, the carbon concentration in austenite increased. At the same time, due to the decrease in temperature, the activity of the atoms was weakened and the diffusion distance was shortened, leading to a decrease in pearlite interlamellar spacing [19][20][21][22].…”

Section: Tem Analysis Of Microstructural Evolutionmentioning

confidence: 99%

Effect of Roller Quenching on Microstructure and Properties of 300 mm Thickness Ultra-Heavy Steel Plate

Han

Wang

et al. 2020

Metals

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In this paper, a 300 mm thickness ultra-heavy steel plate was selected as the research object. In addition, special roller quenching equipment and a new testing method were used to measure the quenching temperature curve at different positions of the steel plate. The relationships and corresponding interaction mechanisms between cooling rate, microstructure, and mechanical properties of an ultra-heavy steel plate during roller quenching were investigated. The results indicated that the cooling rate, strength, hardness, and impact energy decreased gradually along the thickness direction of the plate, while the cooling rate, average grain size, and mechanical properties were relatively uniform with little change along the length direction of the plate. The experimental results provide an effective way to further control the microstructure and properties of ultra-heavy steel plates during roller quenching.

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Effect of Nb micro-alloying on microstructure and properties of thermo-mechanically processed high carbon pearlitic steel

Cited by 40 publications

References 35 publications

Effect of cooling rate on the microstructure and mechanical properties of a low-carbon low-alloyed steel

Effect of cooling rate on the microstructure and mechanical properties of a low-carbon low-alloyed steel

Automobile Tires’ High-Carbon Steel Wire

Effect of Roller Quenching on Microstructure and Properties of 300 mm Thickness Ultra-Heavy Steel Plate

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