Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)最新文献_第5页

Influence of technological factors of melting on the structure and properties of modified heat‑resistant chrome bronzes 熔化技术因素对改性耐热铬青铜结构和性能的影响

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-12-15 DOI: 10.21122/1683-6065-2023-4-94-100

F. G. Lovshenko, I. A. Lozikov

{"title":"Influence of technological factors of melting on the structure and properties of modified heat‑resistant chrome bronzes","authors":"F. G. Lovshenko, I. A. Lozikov","doi":"10.21122/1683-6065-2023-4-94-100","DOIUrl":"https://doi.org/10.21122/1683-6065-2023-4-94-100","url":null,"abstract":"The paper presents the results of a study of the influence of technological factors of open melting on the structure and properties of modified heat‑resistant chrome bronzes. The role of protective atmospheres and deoxidizers in the formation of the chemical composition of alloys is studied and their optimal combination is proposed, consisting in a combination of Cryolite and argon to protect the copper melt during alloying with its preliminary deoxidation with a modifier based on the composition “Cu – 10 % B”, developed and produced at a pilot production facility at the Belarusian‑Russian University. An idea of the kinetics of the dissolution process of a mechanically fused modifying ligature with a high content of an alloying component and its effect on the formation of the structure of cast materials is obtained. The optimal duration of the doping time and the base temperature, depending on the size of chromium inclusions and the state of the surface of its particles, are determined. The phase composition and physico‑mechanical properties of experimental bronzes have been studied.It has been established that the use of a mechanically fused modifying ligature with a high content of alloying component having chromium particles close to micro‑/nanodisperse size with a non‑oxidized surface and a highly effective deoxidizer modifier reduces the temperature and duration of melting, obtaining alloys with a microcrystalline type of structure (2–5 microns) and a complex of physico‑mechanical properties not inferior to, and in terms of heat resistance superior analogues, which is confirmed by the data of production tests at JSC “Belcard” (Grodno, RB) of contact spot welding electrodes made of experimental bronzes, which are 3.8 times more resistant than those used by the plant.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"10 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138996687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of the feed rate value on the distribution of the Q‑factor along the cone of deformation of a CPR mil 进给速度值对 Q 因子沿 CPR 密耳变形锥分布的影响

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-12-15 DOI: 10.21122/1683-6065-2023-4-81-87

V. A. Tomilo, S. V. Pilipenko

{"title":"Influence of the feed rate value on the distribution of the Q‑factor along the cone of deformation of a CPR mil","authors":"V. A. Tomilo, S. V. Pilipenko","doi":"10.21122/1683-6065-2023-4-81-87","DOIUrl":"https://doi.org/10.21122/1683-6065-2023-4-81-87","url":null,"abstract":"To ensure the formation of the necessary microstructure of pipes made of titanium alloys of the Ti‑3Al‑2,5V type, when they are deformed at cold pilgrim rolling mills, it is necessary to provide certain deformation conditions. In particular, the deformation modes are distributed in such a way as to obtain the necessary Q‑factor distribution along the deformation cone. The purpose of this work is to determine the effect of the feed value on the Q‑factor distribution along the deformation zone during forward and reverse movements of the roll mill stand. 1Various methods of carrying out the CPT process were chosen in terms of feeding and rotating the workpiece during the double stroke of the roll mill stand. The research methods are based on known dependencies describing the effect of true deformations in the sections of the working cone on the Q‑factor in these control sections. Calibration using a mandrel with a curved shape of the working surface was chosen for the analysis. 1 Calculations were made for the case of feeding rate before the forward stroke, turning before the reverse, as well as for the case of feeding and turning in both positions of the roll mill stand. The case of mismatch of the feed size is considered, when the feed before the reverse stroke is larger than before the direct one. The methods of leveling the influence of pipe deformation features in the wall calibration zone on the formation of the necessary microstructure of pipes made of Ti‑3Al‑2.5V alloys are proposed.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"240 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138997100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

О перспективности метода аэродинамического звукового упрочнения сплавов 合金空气动力声波强化方法的前景

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-12-15 DOI: 10.21122/1683-6065-2023-4-133-134

V. Y. Stetsenko

引用次数: 0

Based on the results of the 31st International Scientific and Technical Conference “Foundry and Metallurgy 2023. Belarus” 根据第 31 届国际科技大会 "铸造与冶金 2023.白俄罗斯"

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-12-15 DOI: 10.21122/1683-6065-2023-4-9-15

M. A. Sadokha, B. M. Nemenenok, V. M. Konstantinov

引用次数: 0

Nanostructural phase transformations in eutectoid reactions of binary alloys 二元合金共晶反应中的纳米结构相变

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-12-15 DOI: 10.21122/1683-6065-2023-4-30-32

E. I. Marukovich, V. Stetsenko, A. Stetsenko

引用次数: 0

A modern foundry is a prototype of energy–efficient, environmentally neutral production of the future 现代化铸造厂是未来节能、环保型生产的雏形

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-12-15 DOI: 10.21122/1683-6065-2023-4-25-29

S. Rovin

引用次数: 0

Defects in high‑pressure die casting and measures to prevent gas defects 高压压铸件的缺陷和防止气体缺陷的措施

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-12-15 DOI: 10.21122/1683-6065-2023-4-16-24

V. I. Chechukha, M. A. Sadokha

引用次数: 0

Study of changes in the structure of zirconium alloy E125 after deformation by radial shear rolling 径向剪切轧制变形后E125锆合金组织变化的研究

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-08-09 DOI: 10.21122/1683-6065-2023-2-111-118

M. Magzhanov, A. Naizabekov, A. A. Kavalek, E. Panin, A. Arbuz

{"title":"Study of changes in the structure of zirconium alloy E125 after deformation by radial shear rolling","authors":"M. Magzhanov, A. Naizabekov, A. A. Kavalek, E. Panin, A. Arbuz","doi":"10.21122/1683-6065-2023-2-111-118","DOIUrl":"https://doi.org/10.21122/1683-6065-2023-2-111-118","url":null,"abstract":"The rheological properties of the alloy E125 (Zr‑2.5 %Nb) were studied in the range of deformation rates 0.5–15 s‑1 and the temperature range 20–770 °C. A database for computer FEM modeling was created in the specified temperature and speed ranges. In the DEFORM‑3D software package, numerical simulation of a complex radial shear rolling process was carried out using the obtained database. The conditions conducive to the grinding of the alloy structure into an ultrafine‑grained state were determined. Based on the simulation results, a full‑scale experiment of rolling a bar made of alloy E125 on a radial shear rolling mill RSP‑14/40 in 7 passes from a diameter of 37 mm to 20 mm with a total compression in diameter of ε = 85 % was carried out. At the same time, according to the modeling, the total accumulated deformation in the most developed peripheral zone was 27,5 mm/mm. Due to the complex vortex flow of the metal, the distribution of accumulated deformation over the cross section was uneven with a gradient to the axial zone. This should also affect the change in the structure. The changes and the gradient of the structure were studied by the method of EBSD mapping of the sample section with a resolution of 2 mm. The microhardness gradient of the cross section was also investigated by the HV method. The axial and central zones of the sample were studied on the. The structure has a pronounced gradient from the formed equiaxed ultrafine‑grained (UMZ) structure on several outer millimeters of the peripheral section to an elongated rolling texture in the center of the rod. The work shows the possibility of processing with the formation of a gradient structure with enhanced properties for the E125 alloy, and also presents a database for FEM calculations.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127274098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of the process of heating of chip-powder dispersions of ferrous metals in the pass-through muffle furnace of hot briquetting. Message 3 热压块的直通式马弗炉中黑色金属碎末分散体加热过程的模拟。消息3

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-08-09 DOI: 10.21122/1683-6065-2023-2-84-93

O. M. Dyakonov, A. A. Litvinko, V. J. Sereda

引用次数: 0

The influence of the source material and the method of forming the object by layer-by-layer synthesis on the structure of the resulting product 源材料和通过逐层合成形成对象的方法对所得产品结构的影响

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-08-09 DOI: 10.21122/1683-6065-2023-2-75-83

A. S. Fedosenko, F. G. Lovshenko

引用次数: 0