Abstract
Results of an experimental study of temperature distribution along the length of a solid mandrel made of 4Kh5MFS steel in a screw mill 30–80 of Bogorodsky Branch of JSC NPO Pribor during hot rolling of vessels made of steel grade 50 are presented. It is revealed with computer modelling that there is uneven distribution of temperature up to 250 °C along the length of a mandrel from 350 to 600 °C, which leads to crack formation at its surface with a size of about 1.6 mm and a decarburization layer of about 0.8 mm. Regularity of the influence of temperature unevenness along the length of a mandrel on unevenness of hardness distribution from 22 to 50 HRC is established. Results of the study make it possible to develop a mandrel design with the possibility of internal water cooling during broaching vessels in a 30–80 mill. It is shown that use of a water-cooled mandrel made of C0.4Cr5MoVSi steel makes it possible to preserve the original grain structure with a grain size of about 9 points, reduce the decarburization layer by a factor of four, while formation of external defects in the form of cracks is not detected. Based upon calculations of the efficiency carried out at the Bogorodskii Branch of JSC NPO Pribor, it is found that use of a water-cooled mandrel within mill 30–80 will increase its durability by 10% and reduce deviations from permissible geometric dimensions of the cavity of vessels made of steel 50 by 8%.
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References
Romantsev B, Goncharuk A, Aleshchenko A, Gamin Y, Mintakhanov M (2018) Development of multipass skew rolling technology for stainless steel and alloy pipes production. Intern J Adv Manuf Technol 97(9–12):3223–3230
Romantsev BA, Gamin YV, Goncharuk AV et al (2017) Innovative equipment for producing cost-effective hollow billets for mechanical-engineering parts of small diameter. Metallurgist 61:217–222
Zorin IV (2017) Piercing mandrel strengthening by surfacing with nickel aluminide-based alloy. IOP Conf Series: Mater Sci Eng 1(177)
Aleshchenko AS, Kuang N (2021) Study of cylindrical wear of a screw rolling mill. Chernye Met 6:27–31
Goncharuk AV, Gamin YV, Sharafanenko IK et al (2020) Piercing of a billet in a mill with guide disks. Russ Met 13:1637–1642
Tsubouchi K, Akiyama M, Okuyama T (1997) Development and optimization of carbide-reinforced tools and application to hot rolling of stainless steel. J Tribol 119(4):687–693
Sokolov GN, Litvinenko-Ar’kov VB, Lysak VI (2011) Methods for increasing the life of broaching mandrels of piep rolling mills. Zagotov Proizv Mashin 11:10–14
Shatalov RL, Tеpаlin SA, Medvedev VA (2020) Distribution of decarburized layer and hardness of vessels made of 50 steel after hot stam** on a rolling-press line. Chernye Met 5:36–41
Romantsev BA, Aleshchenko AS, Tsyutsyura VY, Tyshchuk IN, Lube II (2017) Features of Piercing mill TPA 50–200 working roll wear during rolling continuously cast and hot-rolled billets. Metallurgist 60(9–10):1062–1069
Shatalov RL, Zakoskin EE, Medvedev VA, Él’dib ISA (2024) Computer and experimental study of the effect of temperature upon broaching mandrel quality indices during rolling vessels for mill 50 within screw mill 30–80, Part 1. Metallurg 2:95–99
Gamin YV, Skripalenko MM, Romantsev BA et al (2021) Prediction of billet fracture at two-high screw rolling piercing. Metallurgist 64:1020–1028
Romantsev BA, Vavilkin NM, Lube II, Krasikov AV (2016) The special features in the pipe plugging in the two-high and three-high stands of the continuous mills on the movable mandrels during their monitoring. Ferr Metall Bull Sci Tech Econ Inf 8:58–61
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Translated from Metallurg, No. 3, pp. 59–62, March, 2024. Russian DOI: https://doi.org/10.52351/00260827_2024_3_59
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Shatalov, R.L., Zagoskin, E.E., Medvedev, V.A. et al. Computer and experimental study of the influence of temperature on broaching mandrel quality indices during rolling vessels made of steel 50 in a screw mill 30–80. Part 2. Metallurgist (2024). https://doi.org/10.1007/s11015-024-01738-x
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DOI: https://doi.org/10.1007/s11015-024-01738-x
Keywords
- Solid and water-cooled mandrel made of C0.4Cr5MoVSi steel
- Screw rolling mill 30–80
- Vessel made of steel grade 50
- Temperature
- Hardness
- Cracks
- Decarburized layer
- Structure