Study of Wear Resistance of Mandrels upon Piercing Workpieces Made of Steel 20Kh13

The results of an experimental study regarding the influence of the material and calibration of the piercing mill mandrel on its wear resistance upon piercing workpieces made of steel 20Kh13 have been presented. To carry out the study, mandrels made of four grades of steel (4Kh5MFS, 5Kh3V3MFS, 20Kh2...

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Bibliographic Details
Published in:Steel in translation 2023-11, Vol.53 (11), p.1005-1011
Main Authors: Korsakov, A. A., Mikhalkin, D. V., Krasikov, A. V., Aleschenko, A. S., Gamin, Yu. V., Bannikov, A. I., Chemaeva, Ya. A., Mikhalkina, E. Yu
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Chromium steels
Durability
Finite element method
Grooves
Mandrels
Materials Science
Piercing
Recesses
Rolling mills
Wear resistance
Workpieces
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Summary:The results of an experimental study regarding the influence of the material and calibration of the piercing mill mandrel on its wear resistance upon piercing workpieces made of steel 20Kh13 have been presented. To carry out the study, mandrels made of four grades of steel (4Kh5MFS, 5Kh3V3MFS, 20Kh2N4A, 3Kh3M3F) and two types of calibrations have been used: with a smooth working surface and a specially designed one that ensures fractional deformation in the source during piercing by applying a periodic variable profile to the working surface, representing longitudinal grooves. The effectiveness of using a mandrel with longitudinal recesses on the working surface to increase its durability is confirmed by the results of computer modeling using the finite element method in the QForm 2D/3D software product. The experimental study was carried out on a two-roll piercing screw rolling mill MISIS-130D with barrel-shaped rolls and a guide tool in the form of fixed rulers. The durability of the mandrel was assessed by visual inspection of the quality of the working surface and by determining the change in mass after each pass upon piercing workpieces made of steel 20Kh13. According to the results of the work, it was found that the wear of all types of mandrels is predominantly adhesive in nature (there are traces of metal adhesion and tearing out on the mandrels). The best results in terms of durability were shown by a mandrel made of steel 20Kh2N4A.
ISSN:0967-0912
1935-0988
DOI:10.3103/S096709122311013X