Parameters of cold pilgering of seamless steel tube

Chu, Zhibing; Xue, Z; Zhang, Duo; Wang, Huanzhu; Li, Wei; Liu, Renhuai; Huang, Qingxue

doi:10.1007/s42243-019-00269-z

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…Scientists from different countries constantly pay attention to the research on cold rolling of seamless pipes. This, first of all, concerns changes in microstructures [8,9] during cold rolling of seamless stainless steel pipes, the ratio of deforma tions on the wall and on the diameter of the pipe (Qfactor) [3], the creation of nanostructures on the inner surface of pipes [10], improved tubesshells of nuclear fuel [11,12], cre ation of new types of microstructures [13], highenergy pro cessing of metals [14]. This is related to the problems of increasing the perfor mance of pipes in various units of responsible purpose.…”

Section: Tablementioning

confidence: 99%

Microstructures and mechanical properties of cold rolled pipes with increased small deformation

Holovchenko,

Grigorenko,

Protsiv

2023

Nauk. visn. nat. hirn. univ.

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Purpose. Experimental study on microstructure, mechanical properties of pipe diversity on a new type of cold rolling pipe, which has the ability to perform different modes of supply and rotation. Methodology. Research method is an experimental one on modern industrial equipment using modern devices. The study was conducted when rolling pipes made of steel 08Cr18Mn10Ti on the CRP 6-20 mills. Rolling route is often 25 × 2.5 mm ® 16 × 1.5 mm, which is often used in production. Rolling was carried out on the CRP 6-20 mills in four modes of feed and rotation: mode 1 – feed is performed before the forward stroke, and rotation before the return stroke of the stand; mode 2 – the feed is performed before the forward stroke, and the rotation before the forward and reverse stroke of the stand; mode 3 – feeding is performed in the front and rear position of the stand and rotation in the rear position of the stand; mode 4 – feed and turn are performed before the forward and reverse of the stand. Findings. Metallographic studies on microstructures showed that for mode 1, the grain size on the outer surface of the pipes is less than on the inner surface. The difference reaches the value of 1–2 points. For mode 4, the opposite is true. The size of the grains on the outer surface of the pipes is larger than on the inner surface. The difference reaches the value of 1–2 points. This can be explained by the fact that in mode 1 most of the compression is performed in the forward stroke rather than in reverse stroke. And in mode 4, these crimps are close in value and smaller than in a forward stroke in mode 2. Originality. New experimental industrial data have been obtained for the first time on the state-of-the-art cold rolling mill for small-diameter pipes made of microstructures of riveted steel 08Cr18Mn10Ti in cross-sectional and longitudinal sections of the pipes on the outer and inner surfaces of the pipes and between them for four possible feeding and turning modes. For the first time, experimental industrial data on the values of strength limit, yield strength and ultimate elongation at four feeding and turning modes have been obtained as well. Practical value. The obtained experimental industrial data from a set of quality parameters of pipes – metal microstructure, mechanical properties, transverse differences in pipe packages allow one to choose modes of supply and rotation in the production of cold-formed pipes to ensure compliance with regulated quality parameters of supply and rotation pipes.

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Section: Tablementioning

confidence: 99%

Microstructures and mechanical properties of cold rolled pipes with increased small deformation

Holovchenko,

Grigorenko,

Protsiv

2023

Nauk. visn. nat. hirn. univ.

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“…In BF operation, both CS and CSR of normal ore-carbon composites are usually required to be greater than 1 200 N/ briquette. 22) To realize a partial substitution of the coke in BF, it is preferable for the carbon in the HCMB to be as high as possible, in addition to its base requirement in CS and CSR. In BF ironmaking, the hot metal is carbon saturated and has a carbon content of 4 wt%.…”

Section: Optimization Of Hcmb Preparation Conditionsmentioning

confidence: 99%

Preparation of High-Carbon Metallic Briquette for Blast Furnace Application

Tang

Liu

2019

ISIJ Int.

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Developments in blast furnace (BF) ironmaking have long focused on low-coke operation. In this study, high-carbon metallic briquettes (HCMB) were prepared using ultrafine iron oxide powders and coal fines for BF application. The preparation conditions were optimized, and the binding mechanism of the briquette was analyzed. The gasification behavior of the optimally prepared HCMB was investigated under conditions simulating the in-furnace environment of the BF, and its application in BF was evaluated through numerical simulations. The results showed that the optimal preparation condition was m hematite /m coal = 2.0. The optimally prepared HCMB had a carbon content of 25.6 wt%, cold strength (CS) of 1 300 N/briquette, and crushing strength after reaction (CSR) of 2 500 N/briquette. The high strength of the briquette was attributed to the iron network binding. The threshold temperature and activation energy of the briquette gasification in the blast furnace were 973 K and 166 kJ/mol, respectively. Simulation results on the HCMB application in a BF of 2 500 m 3 indicated that mixing HCMB of 5% into the ore burden could save approximately 12.5 kg of coke for producing one ton hot metal from the ore.

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“…Goncharuk [13] proposed methods to improve the dimensional accuracy of pipes and the quality of their inner and outer surfaces using computer physics modeling techniques. Chu [14] compared numerical simulation data of the tube rolling process under different process parameters. The results indicated that the rolling force, maximum equivalent stress of tube deformation, average residual stress, and spring back of the tube deformation section all varied with changes in the process parameters.…”

Section: Introductionmentioning

confidence: 99%

Effect of Shape Tool Parameters on the Performance of Cold Circular Three-Dimensional Pilger Cross-Section Roll Forming

et al. 2023

Metals

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Compared with other forming processes, Pilger cold rolling exhibits unique process characteristics and a simple production method, making it highly advantageous in terms of high-precision, high-strength, and poor-plasticity alloys. Among them, the design parameters of the rolling mill play a significant role in the rolling results, with the key design parameters being the hole opening angle θ and the hole gap ΔK. In this study, a numerical simulation model for cold rolling an AZ31B magnesium alloy with variable cross-section three-roll Pilger cold rolling was established, and finite element simulation analysis was employed to obtain the comprehensive performance impact law of key design parameters on the cold-rolled AZ31B magnesium alloy. It can be concluded that when the hole opening angle is 10° and the hole gap is 1.2 mm, the equivalent stress and equivalent plastic strain of the billet reach a minimum, and the surface precision is excellent.

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Parameters of cold pilgering of seamless steel tube

Cited by 9 publications

References 13 publications

Microstructures and mechanical properties of cold rolled pipes with increased small deformation

Microstructures and mechanical properties of cold rolled pipes with increased small deformation

Preparation of High-Carbon Metallic Briquette for Blast Furnace Application

Effect of Shape Tool Parameters on the Performance of Cold Circular Three-Dimensional Pilger Cross-Section Roll Forming

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