Metallurgist最新文献_第6页

Convective and conductive heat transfer in the bath under the arcs of high-power arc steel-melting furnaces 大功率电弧炼钢炉电弧下熔池的对流传热和传导传热

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01931-6

A. N. Makarov

{"title":"Convective and conductive heat transfer in the bath under the arcs of high-power arc steel-melting furnaces","authors":"A. N. Makarov","doi":"10.1007/s11015-025-01931-6","DOIUrl":"10.1007/s11015-025-01931-6","url":null,"abstract":"<div><p>We present the results of evaluation of the radiant heat flux emitted by an arc and incident on the surface of an ellipsoidal segment in the bath located under the arc, as well as the heat fluxes of the arc incident on the surfaces of slag and metal. We also present the results of evaluation of the arc energy spent during the period of oxidation for heating the metal and slag from temperatures of 1610 and 1670 °C to 1660 and 1750 °C, respectively. The amount of unmelted scrap metal during the period of its melting and the amount of energy spent for melting scrap metal on the slopes during the oxidation period were determined. Based on the numerical and experimental results, we plotted isotherms over the slag and metal surfaces at the end of the oxidation period in an electric-arc furnace (EAF). The slag temperature varies from 2500 °C in the hot zones under the arcs to 1650 °C in the peripheral zones on the slopes characterized by the presence of pieces of unmelted scrap metal under the slag layer. The temperature of the metal varies from 2735 °C in the hot zones under the arcs down to 1560 °C in the peripheral zones of location of unmelted charge on the slopes.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 2","pages":"183 - 192"},"PeriodicalIF":0.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168213","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

On the measure of nonflatness of rolled strips and sheets 关于轧制带材和薄板不平整度的测量

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-24 DOI: 10.1007/s11015-025-01934-3

S. M. Belskiy, S. M. Samsonov

引用次数: 0

Methods of reducing the thermal stresses in the heat-insulation lining of blast-furnace tuyere with natural gas supplied through flange holes 通过法兰孔供气降低高炉风口隔热衬里热应力的方法

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-09 DOI: 10.1007/s11015-025-01924-5

Evgeniy A. Volkov, Marina K. Mikhailova, Alexandr G. Radyuk, Mikhail M. Skripalenko, Vladimir V. Sukhanovsky, Alexandr E. Titlyanov

引用次数: 0

A mathematical model of the cyanidation process for the flotation concentrate of the gold deposit of Central Kazakhstan 哈萨克斯坦中部某金矿浮选精矿氰化过程的数学模型

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-09 DOI: 10.1007/s11015-025-01928-1

Zh. A. Yussupova, N. K. Dosmukhamedov, V. A. Kaplan, Ye. Ye. Zholdasbay, Yu. B. Icheva

{"title":"A mathematical model of the cyanidation process for the flotation concentrate of the gold deposit of Central Kazakhstan","authors":"Zh. A. Yussupova, N. K. Dosmukhamedov, V. A. Kaplan, Ye. Ye. Zholdasbay, Yu. B. Icheva","doi":"10.1007/s11015-025-01928-1","DOIUrl":"10.1007/s11015-025-01928-1","url":null,"abstract":"<div><p>In this study, the results of the conducted research were used to develop quantitative mathematical models predicting the extraction of gold into solution from the floatation concentrate with a gold content of 17.9% depending on the material grain size, cyanide concentration, and process duration. It was found that with optimal grain size parameters—class 80 mm with a grain size of 10 μm, cyanide concentration of 0.1%, and process time of 20 h, high percentage of gold extraction into solution (86.7%) is achieved. A predictive mathematical model of cyanidation of a flotation concentrate has been constructed, which accounts for the mutual effect of the grain size of the material and concentration of sodium cyanide on the extraction of gold into solution. It has been established that the material grain size is the main factor affecting gold extraction. The variation in the NaCN concentration (from 0.1 to 0.2%) and process duration (from 20 h and longer) only slightly increases the percentage of gold extraction (by 0.3% abs.). The generated mathematical models adequately predict the extraction of gold during the flotation concentrate cyanidation process depending on various process parameters, such as the grain size of the flotation concentrate, consumption of sodium cyanide, and process duration.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 1","pages":"166 - 173"},"PeriodicalIF":0.8,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164080","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

Stress analysis in the crust of continuously cast steel billets produced by molding 模压连铸钢坯外壳应力分析

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-09 DOI: 10.1007/s11015-025-01913-8

V. V. Stulov

引用次数: 0

Influence of heat treatment on the structure and properties of CoCrFeMnNi + NbC coatings obtained by nonvacuum electron-beam surfacing 热处理对非真空电子束堆焊CoCrFeMnNi + NbC涂层组织和性能的影响

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-09 DOI: 10.1007/s11015-025-01921-8

A. B. Yurgin, A. A. Ruktuev, N. V. Stepanova, A. E. Riznitsky, D. V. Khudyakov, I. A. Bataev

引用次数: 0

Influence of thermo-deformation treatment parameters on the strength of hot-rolled high-strength low-carbon steels microalloyed with titanium 热变形处理参数对微合金化钛热轧高强低碳钢强度的影响

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-06-09 DOI: 10.1007/s11015-025-01915-6

Anton V. Koldaev, Aleksey I. Dagman, Aleksandr Yu. Kazarin, Nataliya A. Arutuinyan, Saddam Z. Masharipov, Dmitriy L. D’yakonov

{"title":"Influence of thermo-deformation treatment parameters on the strength of hot-rolled high-strength low-carbon steels microalloyed with titanium","authors":"Anton V. Koldaev, Aleksey I. Dagman, Aleksandr Yu. Kazarin, Nataliya A. Arutuinyan, Saddam Z. Masharipov, Dmitriy L. D’yakonov","doi":"10.1007/s11015-025-01915-6","DOIUrl":"10.1007/s11015-025-01915-6","url":null,"abstract":"<div><p>High-strength microalloyed low-carbon steels attract attention due to their unequalled combination of service and technological properties and their wide application in various industries. Currently, one of directions for their development involves the use of titanium microalloying and the search for appropriate optimal parameters of thermo-deformation treatment in order to achieve the required level of mechanical properties by controlling the formation of phase precipitates. This work investigates industrial hot-rolled steels with 355 and 420 MPa steel grades by thermodynamic analysis as well as by optical and transmission electron microscopy. It is established that an increase in the temperatures of finish rolling and reeling contributes to the formation of nanoscale interphase precipitates having the greatest strengthening effect. However, when reeling temperatures exceed 600 °C, the strength of the steel decreases due to an increase in the size of both grains and precipitates.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 1","pages":"55 - 64"},"PeriodicalIF":0.8,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164071","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 special properties of austenitic steel, obtained by additive hybrid technologies 奥氏体钢增材杂化工艺的特殊性能研究

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-05-21 DOI: 10.1007/s11015-025-01917-4

D. N. Trushnikov, I. E. Keller, E. A. Krivonosova, A. V. Il’inykh, V. V. Chudinov, A. G. Aksenov, I. S. Khomutinin

{"title":"Study of special properties of austenitic steel, obtained by additive hybrid technologies","authors":"D. N. Trushnikov, I. E. Keller, E. A. Krivonosova, A. V. Il’inykh, V. V. Chudinov, A. G. Aksenov, I. S. Khomutinin","doi":"10.1007/s11015-025-01917-4","DOIUrl":"10.1007/s11015-025-01917-4","url":null,"abstract":"<div><p>An experimental and theoretical study has been carried out to analyze the impact of interlayer forging in the process of hybrid additive manufacturing on the development of fracture under dynamic and multicycle loading, which is relevant for justifying the models for estimating the resource of austenitic steel products. It has been established that forging significantly affects the strength of synthesized steel during quasi-static and dynamic testing, as well as the fatigue resistance during classical multicycle fatigue failure. It was found that interlayer forging leads to a decrease in the signs of trans-crystallization of the deposited metal and an increase in the proportion of equiaxial dendrites in the AISI 308LSi structure, which contributes to an increase in these characteristics during dynamic and multicycle loading of steel obtained by hybrid additive deposition. In the quasi-static range of strain rates, the tensile strength of deposited steel (with forging) reaches 810–820 MPa, which is 10% higher compared to the analog obtained by deposition without forging. Under the strain rates ranging from 10<sup>2</sup> to 10<sup>4</sup> s<sup>−1</sup>, the tensile strength of deposited steel (with forging) reaches 1400 MPa, which already exceeds the strength of the material deposited without forging by 17% (or 200 MPa). Interlayer forging during deposition significantly increases the resistance of steel to multicycle fatigue: σ<sub>max</sub> of the deposited material in the vertical and horizontal directions at a number of cycles above 200,000 exceeds σ<sub>max</sub> of the sheet material, while at 10<sup>7</sup> cycles, the material can withstand a maximum stress of 360–375 MPa, which exceeds the level of the sheet material by 10%.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 1","pages":"72 - 81"},"PeriodicalIF":0.8,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168191","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

High-strength steels with bainitic structure and improved impact toughness 具有贝氏体组织和提高冲击韧性的高强度钢

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-05-20 DOI: 10.1007/s11015-025-01914-7

M. V. Maisuradze, A. A. Kuklina, V. V. Nazarova, E. V. Antakov

{"title":"High-strength steels with bainitic structure and improved impact toughness","authors":"M. V. Maisuradze, A. A. Kuklina, V. V. Nazarova, E. V. Antakov","doi":"10.1007/s11015-025-01914-7","DOIUrl":"10.1007/s11015-025-01914-7","url":null,"abstract":"<div><p>Based on statistical processing of experimental data and thermodynamic calculations, compositions of high strength steels with bainitic structure and improved impact toughness were proposed. The stability of undercooled austenite and the ratio of the impact toughness of lower bainite to that of martensite were used as criteria for developing the steel compositions. The relative impact toughness of lower bainite correlates with the value of ∆<i>T</i><sub>0</sub>, which characterizes the position of the <i>T′</i><sub>0</sub> = f(%C) dependence on the equilibrium diagram for a given steel composition relative to the theoretical dependence for the Fe–C system. Experimental CCT (continuous cooling transformation) diagrams of undercooled austenite transformation in the developed steels were constructed. Analysis of dilatometry curves and microstructure of the steels after continuous cooling at rates of 0.1–30 °C/s allowed the determination of the quantitative ratio of structural constituents. The mechanical properties of martensitic and bainitic microstructures in the investigated steels were determined. A comprehensive criterion for the mechanical properties of engineering steels, including strength, plasticity, and impact toughness, was proposed.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 1","pages":"42 - 54"},"PeriodicalIF":0.8,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168119","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

Evolution of microstructure of 08C18Cr10Ni steel after thermomechanical treatment 热处理后08C18Cr10Ni钢组织演变

IF 0.8 4区材料科学

Metallurgist Pub Date : 2025-05-20 DOI: 10.1007/s11015-025-01916-5

I. E. Volokitina, A. V. Volokitin, T. D. Fedorova

引用次数: 0