Metallurgist最新文献_第5页

Simulation modeling and improvement of the design of a combined barrier to shock loading 冲击载荷组合屏障的仿真建模与设计改进

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-30 DOI: 10.1007/s11015-025-01946-z

Olesya Yu. Agapitova, Dmitriy A. Dvoynikov, Aleksandr G. Zalazinsky, Anton V. Nesterenko, Vladimir G. Titov, Vladimir P. Shveikin

引用次数: 0

Fracture resistance in hardfaced metal for continuous casting rollers and hot rolling mill work rolls 连铸辊和热轧工作辊用硬面金属的抗断裂性能

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01935-2

L. K. Leshchinskiy, V. P. Ivanov, E. V. Lavrova, D. P. Il’yashchenko, M. V. Ivanov

{"title":"Fracture resistance in hardfaced metal for continuous casting rollers and hot rolling mill work rolls","authors":"L. K. Leshchinskiy, V. P. Ivanov, E. V. Lavrova, D. P. Il’yashchenko, M. V. Ivanov","doi":"10.1007/s11015-025-01935-2","DOIUrl":"10.1007/s11015-025-01935-2","url":null,"abstract":"<div>Continuous casting machine rolls and hot rolling mill work rolls are susceptible to surface cracking under dynamic loading. The fracture resistance of homogeneous metal compositions used for their manufacture and hardfacing is determined by the work of crack initiation. This is evaluated by separating the work of crack initiation from the work of crack propagation. Research on the dynamic fracture process of heterogeneous multilayer composites hardfaced on hot rolling mill work rolls confirmed that crack arrest at the interface between strong and ductile layers occurs by a delamination mechanism, ensuring high impact toughness. Furthermore, it was found that homogeneous steel compositions with cast and plastically deformed structures used for the manufacture and hardfacing of continuous casting machine rollers and work rolls exhibit a linear relationship between fatigue crack growth rate and stress intensity factor range. This linear relationship deviates in heterogeneous hardfaced metal structures, where the fatigue crack propagation rate varies and exhibits regions of abrupt deceleration. Similar behavior is observed in welded joints of steels with different compositions and mechanical properties. The study also revealed that in cases where there are significant differences in the structure and thermophysical properties between the hardfacing layer and the base material of continuous casting machine rollers, a sharp drop in the level of axial tensile stresses at the fusion boundary leads to the arrest of surface fatigue cracks. In the absence of such a drop in stress, the crack changes direction and slows down, but does not stop. In addition, the application of variable composition hardfacing technology to hot rolling mill work rolls not only reduces uneven wear along the roll barrel, but also increases resistance to surface cracking.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 2","pages":"218 - 226"},"PeriodicalIF":0.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168211","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

Carbide banding as the basis for the Damascus structure of the 18th century Persian blade steels 碳化物带是18世纪波斯刀片钢大马士革结构的基础

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01948-x

D. A. Sukhanov, K. S. Khaydakov, N. V. Plotnikova, E. O. Gorbovskii

引用次数: 0

Bi2Ge2O7 crystalline structure: a new metastable compound discovered in the Bi2O3–GeO2 system Bi2Ge2O7晶体结构：在Bi2O3-GeO2体系中发现的一种新的亚稳化合物

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01942-3

T. V. Bermeshev, A. N. Zaloga, L. A. Solovyov, M. P. Bundin, A. S. Samoilo, D. V. Khlystov, I. S. Plotnikov, E. V. Mazurova, A. A. Kovaleva, O. V. Yushkova, D. S. Voroshilov, V. M. Bespalov

{"title":"Bi2Ge2O7 crystalline structure: a new metastable compound discovered in the Bi2O3–GeO2 system","authors":"T. V. Bermeshev, A. N. Zaloga, L. A. Solovyov, M. P. Bundin, A. S. Samoilo, D. V. Khlystov, I. S. Plotnikov, E. V. Mazurova, A. A. Kovaleva, O. V. Yushkova, D. S. Voroshilov, V. M. Bespalov","doi":"10.1007/s11015-025-01942-3","DOIUrl":"10.1007/s11015-025-01942-3","url":null,"abstract":"<div>The paper reports on the crystalline structure of a new metastable compound (Bi2Ge2O7) found in the Bi2O3–GeO2 system. This new phase was synthesized from powders by slow cooling of the melt in a platinum container from 1125 °C. The X‑ray diffraction analysis was used to determine the monoclinic lattice parameters of the crystalline structure (a = 14.81691(4) Å, b = 5.28586(1) Å, c = 9.45669(4) Å, β = 124.4766(2) deg., V = 610.560(3) Å3) and space group C2/c. The sample also contains a small admixture of α‑quartz-type GeO2 (up to 2 wt. %), which could not be removed at this stage of research. Scanning electron microscopy and energy dispersive analysis revealed that the synthesized samples consist of Bi2Ge2O7 plates and Bi2Ge2O7+GeO2 mixture, which is formed along the plate boundaries. The ratio of the initial components (32:68 mol. %) is the most optimal, as it allows obtaining the minimum content of impurity phase (GeO2).</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 2","pages":"282 - 290"},"PeriodicalIF":0.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169507","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 the factors affecting the defect formation on the inner pipe surface during plug-rolling 柱塞轧制过程中影响管内表面缺陷形成的因素研究

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01918-3

I. N. Chernykh, P. N. Nifantev, K. V. Bol’nikh, A. V. Kuznetsov

{"title":"Investigation of the factors affecting the defect formation on the inner pipe surface during plug-rolling","authors":"I. N. Chernykh, P. N. Nifantev, K. V. Bol’nikh, A. V. Kuznetsov","doi":"10.1007/s11015-025-01918-3","DOIUrl":"10.1007/s11015-025-01918-3","url":null,"abstract":"<div>A typical challenge associated with pipe-rolling machinery comprising an automatic mill or a tandem mill is the occurrence of defects on the inner pipe surface, such as roll marks (depressions). The presence of such defects prevents the application of high-quality insulation coating to the inner pipe surface. A significant number of studies have been devoted to solving the issue of roll mark occurrence, however, the proposed solutions do not fully account for the specifics of pipe production using individual machinery units. Therefore, solving the problem requires either adapting the existing methods to a specific unit, or searching for new, more universal methods. The article provides a summary of the available information concerning the problem of roll mark formation on the inner pipe surface, and describes studies conducted by the authors in an attempt to refine the defect occurrence mechanisms using computer simulation. Based on the computer models and combined statistical analysis of the pipe quality, the factors contributing to the occurrence of defects have been identified.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 1","pages":"82 - 89"},"PeriodicalIF":0.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168984","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

Energy storage system model for uninterruptible power supply of metallurgical plants 冶金厂不间断电源储能系统模型

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01947-y

O. E. Kuvaldin, K. V. Litsin

{"title":"Energy storage system model for uninterruptible power supply of metallurgical plants","authors":"O. E. Kuvaldin, K. V. Litsin","doi":"10.1007/s11015-025-01947-y","DOIUrl":"10.1007/s11015-025-01947-y","url":null,"abstract":"<div>The main reasons for implementing energy storage systems (ESS) are the excessive consumption of fossil fuels by gas piston or diesel generator sets and the poor quality of the electrical grid at the plant. These issues can even cause emergency shutdowns due to the weak dynamic response to sudden load changes of the generator. In such systems, ESS can take the backup generator unit out of service, reduce fuel consumption and mechanical loads on the generator equipment, and improve the reliability of the generator units, thereby reducing maintenance and repair costs. A lithium-ion battery-based energy storage system model has been developed for closed electrical systems, such as drilling sites. The study presents an example of modeling a real industrial process, specifically a drilling rig. The data is collected continuously over a 5-day period. The developed model is based on the principle of encapsulation (modularity), which allows it to be adapted to the needs of different metallurgical facilities involved in raw material extraction and processing or other metallurgical operations. The model enables preliminary calculations of power supply for metallurgical facilities, which increases their operational efficiency and facilitates the selection of necessary equipment.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 2","pages":"330 - 337"},"PeriodicalIF":0.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169503","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

Improving the operation of the rolling complex 改进轧制联合体的运行

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01937-0

A. R. Fastykovsky, A. I. Musatova, B. N. Absadykov, R. G. Dubrovin, N. V. Martyushev

引用次数: 0

Investigation of porosity changes in a metallized pellet in the process of deformation 金属化球团变形过程中孔隙率变化的研究

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01930-7

T. V. Nikitchenko, A. S. Timofeeva, V. V. Fedina

引用次数: 0

Determination of the spectral emissivity coefficient of furnace and air-oxide scale of Ti–6Al–4V titanium alloy Ti-6Al-4V钛合金炉内光谱发射系数及空气氧化垢的测定

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01919-2

A. Yu. Postylyakov, V. A. Gol’tsev, A. A. Koksharov, D. L. Shvarts

{"title":"Determination of the spectral emissivity coefficient of furnace and air-oxide scale of Ti–6Al–4V titanium alloy","authors":"A. Yu. Postylyakov, V. A. Gol’tsev, A. A. Koksharov, D. L. Shvarts","doi":"10.1007/s11015-025-01919-2","DOIUrl":"10.1007/s11015-025-01919-2","url":null,"abstract":"<div>We present the results of experimental determination of the emissivity coefficient ε of furnace and air scale for Ti–6Al–4V alloy (an analog of the Russian VT6 alloy), which is one of the most extensively used titanium alloys. According to GOST R ISO 18434-1-2013, the procedure of measurements is based on the simultaneous recording of temperature in the course of cooling of a cylindrical sample by using contact and noncontact methods with subsequent determination of ε from the equality of both values. On the basis of the obtained data, we formed samples and computed the average values of <ε> equal to 0.876 and 0.572 for the furnace and air scales, respectively. A significant dependence of the emissivity coefficient on the temperature of the sample was not detected. The process of cooling of the sample from the initial heating temperature was simulated by the finite-element method. It is shown that the numerical and experimental data exhibit both qualitative and a quantitative agreement at five reference surface points (the relative error is not greater than 2%). The obtained results can be used to monitor the values of temperature in the course of heating and deformation treatment of the Ti–6Al–4V alloy in the industry.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 1","pages":"90 - 99"},"PeriodicalIF":0.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168983","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

Evaluation of the possibility of microarc surface alloying of steel by using ammonium molybdate as a diffusant source 钼酸铵扩散源对钢微弧表面合金化可能性的评价

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01933-4

M. S. Stepanov, Y. M. Dombrovskii

{"title":"Evaluation of the possibility of microarc surface alloying of steel by using ammonium molybdate as a diffusant source","authors":"M. S. Stepanov, Y. M. Dombrovskii","doi":"10.1007/s11015-025-01933-4","DOIUrl":"10.1007/s11015-025-01933-4","url":null,"abstract":"<div>Microarc surface alloying of steel is one of the most efficient methods of surface hardening of steel products. As the source of alloying elements, we use a coating pre-applied to the surface intended for hardened. Chemical compounds of alloying elements are, as a rule, used in the composition of the coating. To create coatings based on molybdenum carbide, it is advisable to analyze the possibility of using a low-cost and easily accessible substance, namely, ammonium molybdate, as a source of diffusant. As the most reliable method that can be used for this assessment, we can mention the thermodynamic analysis of possible chemical reactions. The aim of the present work is to determine, with the help of the thermodynamic analysis, the possibility and conditions of application of ammonium molybdate as a source of the diffusant in the process of microarc surface molybdenum plating of steel products.We determined the variations of the Gibbs free energy and studied the temperature range of possible chemical reactions. The behavior of the Gibbs energy was carried out by the Temkin–Schwarzman method, which takes into account the temperature dependence of the heat capacities of substances participating in the reaction.The results of the performed thermodynamic analysis of the chemical reactions of reduction of molybdenum trioxide under the conditions of microarc heating demonstrate that both its direct reduction and reduction with an intermediate stage of molybdenum-dioxide formation are possible. It was experimentally confirmed that a diffusion layer is formed by a solid solution of molybdenum and carbides. Under this layer, we observe a carbonized zone with pearlite structure followed by the original structure of 20 steel. The maximum depth of the diffusion layer equal to 50–55 μm is observed for a volume concentration of the diffusant powder in the coating equal to 50% and its thickness of 1.0 mm.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 2","pages":"204 - 211"},"PeriodicalIF":0.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168217","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