Metallurgist最新文献_第3页

Structure and properties of the Al–Ti–Cu system diffusion coatings

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-17 DOI: 10.1007/s11015-024-01846-8

V. G. Shmorgun, O. V. Slautin, V. P. Kulevich, R. E. Novikov

引用次数: 0

Influence of heat treatment on the structure, phase composition, and properties of an orthorhombic titanium aluminum alloy obtained by selective laser melting

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-12 DOI: 10.1007/s11015-024-01825-z

S. L. Demakov, A. G. Illarionov, S. I. Stepanov, M. S. Karabanalov, M. A. Shabanov, A. A. Popov

{"title":"Influence of heat treatment on the structure, phase composition, and properties of an orthorhombic titanium aluminum alloy obtained by selective laser melting","authors":"S. L. Demakov, A. G. Illarionov, S. I. Stepanov, M. S. Karabanalov, M. A. Shabanov, A. A. Popov","doi":"10.1007/s11015-024-01825-z","DOIUrl":"10.1007/s11015-024-01825-z","url":null,"abstract":"<div><p>The impact of heat treatment on the structural-phase characteristics, physical and mechanical properties of an alloy based on orthorhombic titanium aluminide (O-alloy) produced by selective laser melting was investigated using differential scanning calorimetry, scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction analysis, and microindentation. Modifying the selective laser melting process parameters, specifically increasing the relative energy density from 49 to 97 J/mm<sup>3</sup>, results in the evolution of the porosity character of the samples after selective laser fusion. This transition is observed from porosity associated with the lack-of-fusion to the gas porosity inherited from the pores in the powder and gas entrapment during melting. The metastable β‑solid solution that is fixed in the O‑alloy during selective laser melting undergoes decomposition in two temperature ranges, 300–600 °C and 650–800 °C, when heated at a rate of 50 °C per minute up to 900 °C. An increase in the heat treatment temperature from 750 to 900 °C of the as-built O‑alloy results in a reduction in the volume fraction and an expansion in the thickness of the O‑platelets precipitated during the decomposition of the β‑solid solution. This phenomenon leads to a decline in the impact of dispersion hardening (hardness growth) and enhancement in the elastic modulus. This study examines the impact of volumetric energy density during selective laser melting on the chemical composition of the O‑alloy, the stability of as-built alloy to decomposition of β‑solid solution and the formation of a combination of physical and mechanical properties during heat treatment.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 8","pages":"1155 - 1165"},"PeriodicalIF":0.8,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of slag binders formed during the firing of iron ore pellets

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-12 DOI: 10.1007/s11015-024-01838-8

Tatyana V. Nikitchenko, Anna S. Timofeeva, Victoria V. Fedina, Svetlana B. Shokova, Irina S. Stepanova

引用次数: 0

Influence of pipe steel and welded joint microstructure on failure resistance with testing in hydrogen

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-12 DOI: 10.1007/s11015-024-01820-4

S. Yu. Nastich, V. A. Lopatkin, V. A. Egorov, A. B. Arabey, A. Yu. Mikhalev

引用次数: 0

Possibilities for improvement of technology and equipment for continuous hot rolling of steel strips

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-11 DOI: 10.1007/s11015-024-01824-0

A. V. Aldunin

{"title":"Possibilities for improvement of technology and equipment for continuous hot rolling of steel strips","authors":"A. V. Aldunin","doi":"10.1007/s11015-024-01824-0","DOIUrl":"10.1007/s11015-024-01824-0","url":null,"abstract":"<div><p>The properties of metal rolled in continuous wide strip hot rolling mills are not currently being fully utilized to achieve the desired structure. By employing the austenite recrystallization diagram of steel, which is based on the findings of physical modeling and quantitative metallographic analysis regarding the distribution of relative compression on stands of the continuous finishing train of the mill, it is possible to obtain finished strips with minimal grain diversity. In the transition from the conditions of rolling a narrow model sample to the actual conditions of rolling a wide strip with tension, it is essential to consider the correction of the crushing coefficient of recrystallized austenite grains in accordance with the stress-strain state of the metal. To limit the growth of austenite grains subsequent to the initial compression in the continuous finishing train of the mill, instead of the initial two four-roll stands, it is proposed that a novel technical solution be implemented: a double-four sheet-rolling stand. In order to optimize the quality of the hot-rolled edges of finished strips, it is recommended that the vertical rolls be positioned behind the double-four stand in the finishing train.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 8","pages":"1149 - 1154"},"PeriodicalIF":0.8,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of deformability during the rolling of aluminum alloy 1580 doped with small additions of erbium and ytterbium

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-11 DOI: 10.1007/s11015-024-01833-z

Igor L. Konstantinov, Yuriy V. Baykovskiy, Pavel O. Yuryev, Alexandr I. Bezrukikh, Sergey B. Sidelnikov, Anastasia S. Saparova, Yulbarshon N. Mansurov, Evgeniy G. Partyko, Dmitriy N. Bozhko

{"title":"Study of deformability during the rolling of aluminum alloy 1580 doped with small additions of erbium and ytterbium","authors":"Igor L. Konstantinov, Yuriy V. Baykovskiy, Pavel O. Yuryev, Alexandr I. Bezrukikh, Sergey B. Sidelnikov, Anastasia S. Saparova, Yulbarshon N. Mansurov, Evgeniy G. Partyko, Dmitriy N. Bozhko","doi":"10.1007/s11015-024-01833-z","DOIUrl":"10.1007/s11015-024-01833-z","url":null,"abstract":"<div><p>This paper presents a study on the deformability of aluminum alloy 1580 during rolling, where scandium is partially replaced with small additions of erbium (Er) and ytterbium (Yb). The samples were ingots with a cross-section of 60 × 200 mm, obtained through casting in a semicontinuous casting installation. This work included the computer modeling of the hot and cold rolling processes of ingots in the Deform-3D program, which showed that the Cockcroft–Latham criterion could be used to predict correctly the amount of total reduction leading to the emergence of cracks during the hot and cold rolling of alloy 1580 doped with small additions of Er and Yb, as confirmed by the results of a physical experiment. The subsequent hot rolling of the ingots on a double-high mill 330 and then cold rolling on the MDM ARIETE LS 400 × 240 mill confirmed the plasticity of the alloy, determined by a virtual experiment, both during hot and cold rolling. Moreover, the mechanical properties of alloy 1580 with small additions of Er and Yb after annealing in the temperature range 250–400 °C practically corresponded to the properties of alloy 1580 of the grade composition. Therefore, its scandium content can be reduced over time by replacing it with Er and Yb.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 8","pages":"1231 - 1239"},"PeriodicalIF":0.8,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of supplying natural gas through flange holes on the operation of blast furnace tuyere with heat-insulating insert in the blast channel

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-11 DOI: 10.1007/s11015-024-01829-9

S. V. Albul, O. A. Kobelev, I. A. Levitskii

{"title":"Effect of supplying natural gas through flange holes on the operation of blast furnace tuyere with heat-insulating insert in the blast channel","authors":"S. V. Albul, O. A. Kobelev, I. A. Levitskii","doi":"10.1007/s11015-024-01829-9","DOIUrl":"10.1007/s11015-024-01829-9","url":null,"abstract":"<div><p>The distribution of natural gas, supplied into the blast channel of an air tuyere equipped with a heat-insulating insert, plays a positive role. On the one hand, it improves the mixing of natural gas with blast air and its combustion, and on the other hand, it reduces thermal stresses in the insert. The Ansys platform was used to perform mathematical simulation of gas dynamics, heat transfer, and combustion processes related to natural gas being supplied into the blast channel of a blast furnace tuyere through a series of holes in the flange. It has been shown that by supplying natural gas into the blast channel through the flange holes, it becomes possible to improve its combustion efficiency in the tuyere, leading to an increase in temperature and wind rate compared to the traditional method of supplying natural gas into the blast channel through a single tube via an inner sleeve. By using a model of the flange, containing only a manifold with a tube for supplying natural gas and its discharge through the holes, it was established that in order to minimize the non-uniformity in the natural gas supply distribution between the holes, the gas supply tube should be installed symmetrically relative to the manifold plugs, which in reality are formed by the tuyere cooling water supply and discharge tubes. It has been found that supplying natural gas through the flange holes leads to a decrease in thermal stresses in the insert by about 2 times compared to the traditional natural gas supply, which helps increase the durability of the insert. In this case, the resulting non-uniformity of supplying natural gas through the flange holes into the blast channel does not lead to a significant change in insert stresses.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 8","pages":"1193 - 1203"},"PeriodicalIF":0.8,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New technologies for processing titanium alloy shaving waste without metal remelting to produce finished products

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-11 DOI: 10.1007/s11015-024-01835-x

Maxim V. Zharov

{"title":"New technologies for processing titanium alloy shaving waste without metal remelting to produce finished products","authors":"Maxim V. Zharov","doi":"10.1007/s11015-024-01835-x","DOIUrl":"10.1007/s11015-024-01835-x","url":null,"abstract":"<div><p>This article analyzes the results of research on the development of technology for processing waste shavings of various groups of titanium alloys without remelting the metal into finished products with a compact material structure and rather high-strength characteristics. The proposed chip processing technology includes several operations: shaving cleaning, magnetic separation, hydrogen plasticization, two-stage briquetting with a conical and flat punch, degassing of the briquette capsule shell, shell sealing, thermocompression processing of the briquette in a capsule shell, extrusion of the briquette together with the capsule, and mechanical treatment. The aspects of shaving briquetting obtained during the mechanical processing of titanium alloys are studied, and the features of the formation of briquettes using various briquetting methods are analyzed. The most rational methods for briquetting titanium alloy shavings are determined, ensuring the most efficient processing of the compacted material and the maximum density of the formed briquettes. Hydrogen plasticization of titanium shavings not only promotes more intense compaction of the porous briquette material but also promotes the formation of additional sites of solid-phase bonding in the presence of compressive stresses and shear deformations. The effect of the use of punches with a conical working surface during the consolidation of shaving material in the process of cold briquetting is studied.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 8","pages":"1250 - 1260"},"PeriodicalIF":0.8,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of nonmetallic inclusions and phase precipitates on the fatigue fracture resistance of low-carbon microalloyed steels

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-11 DOI: 10.1007/s11015-024-01822-2

N. A. Arutyunyan, A. V. Koldaev, A. B. Stepanov, S. F. Dunaev

引用次数: 0

Mechanical properties of extra thick-walled shells from grade T wheel steel obtained by the screw piercing process

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-12-11 DOI: 10.1007/s11015-024-01823-1

V. P. Romanenko, A. V. Fomin, A. A. Sevastyanov, G. A. Filippov, O. V. Livanova, D. R. Radzhabov

引用次数: 0