Determination of pearlite morphology in high-carbon hot rolled steel

Szala, J.; Kuc, D.

doi:10.1515/amm-2017-0045

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…The correctness of these characteristics determination causes the stability of the metal products production and its subsequent operation. The proposed methods and techniques are aimed to improve accuracy, objectivity and reduce energy and human resources [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Method for the High-Carbon Wire Rod Pearlite Grain Grade Identification

Shubin

Shubina

2020

SSP

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The main characteristics of metal long products quality include mechanical properties, depending on the microstructure state. The key indicator for evaluation the micro-structure of high carbon steel can be considered the 1st grain grade lamellar pearlite Bfp. For the currently used pearlite dispersion method, according to GOST 8233-56, it is characterized by the subjectivity of the view fields choice for the microstructure evaluation, that reduces the quality of the obtained results. The study purpose was to improve the method of high-carbon steel wire rod microstructure estimation, to reduce the error magnitude in determining the 1st grain grade lamellar pearlite. The experiments were carried out on samples of high-carbon steel wire rod with a carbon content of 0,58 – 0,77 %. The pearlite dispersion was evaluated in 27 view fields, located on mutually perpendicular diagonals of the sample cross section. The study results showed the possibility of reducing the error in determining the estimated value of the high-carbon steel wire rod microstructure pearlite dispersion. Microstructure evaluation in the five view fields should be carried out, taking into account the weight coefficients, determined by the ratio of the zones length, occupied by pearlite with a certain percentage of the 1st grade grain pearlite to the wire rod radius. The proposed method of the microstructure evaluation increases assessment accuracy, without complication of its implementation process.

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Section: Introductionmentioning

confidence: 99%

Improvement of the Method for the High-Carbon Wire Rod Pearlite Grain Grade Identification

Shubin

Shubina

2020

SSP

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“…The choice of technology for processing high-carbon rod and subsequent operating conditions for finished products is determined by the level of specified mechanical properties and technological (operational) parameters. The accuracy and objectivity of their definition depends on the chosen tools and techniques [1][2][3][4][5][6][7][8][9][10]. The highest accuracy and objectivity of their determination is achieved when the influence of the human factor is minimised.…”

Section: Introductionmentioning

confidence: 99%

Methodology of High-Carbon Wire Rod Perlite Grain Grade Identification

Shubin

Shubina

2018

SSP

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The quality of the high-carbon rod is determined by mechanical properties, which depend on microstructure characteristics, in particular the perlite grain grade. The existing technique for determining the perlite dispersion has the main drawback - the subjectivity of choosing the five worst view fields for evaluation, which reduces the accuracy of the determination results. The article presents the results of a study aimed at increasing the objectivity and accuracy of the evaluation of high-carbon wire rod perlite grain grade. An improved technique for determining the high-carbon wire rod perlite grain grade – Pgg with five view fields is proposed. The cross-section of the rod sample is considered as an inhomogeneous area from the perlite dispersion point of view, which is divided into three annular zones with different levels of perlite dispersion. Selection of five view fields is carried out as follows: one from the center of the central zone, two fields in the second - an intermediate zone and two fields in the outer zone. Statistical analysis of the experimental data showed that all view fields should be located on the same diagonal. The location of the view fields is fixed and is unchangeable for all samples under study. The technique described in the article is an effective tool for analyzing the structure of high-carbon steel wire rod.

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