METAL 2020 Conference Proeedings最新文献_第9页

Microstructure, Tribological Behaviour and xrd analysis of HVOF Sprayed and Laser Remelted CoCrTaAlCSiY Coatings HVOF喷涂和激光重熔CoCrTaAlCSiY涂层的微观结构、摩擦学性能和xrd分析

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3539

A. Glanc, Š. Houdková, Z. Jansa, M. Vostřák

引用次数: 1

EFFECT OF STRAIN ACCUMULATION UNDER HIGH TEMPERATURE THERMOMECHANICAL PROCESSING ON THE ROLLING FORCE AND MECHANICAL PROPERTIES OF AUSTENITIC STAINLESS STEEL WITH VARIOUS CARBON CONTENT 高温热机械加工中应变积累对不同含碳量奥氏体不锈钢轧制力和力学性能的影响

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3468

A. Rudskoi, G. Kodzhaspirov, J. Kliber

引用次数: 0

Microstructure and mechanical properties of TiAl-based alloy produced by selective laser melting 选择性激光熔化制备tial基合金的显微组织和力学性能

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3604

I. Polozov, Artem Kantyukov, V. Popovich, Jia-Ning Zhu, A. Popovich

{"title":"Microstructure and mechanical properties of TiAl-based alloy produced by selective laser melting","authors":"I. Polozov, Artem Kantyukov, V. Popovich, Jia-Ning Zhu, A. Popovich","doi":"10.37904/metal.2020.3604","DOIUrl":"https://doi.org/10.37904/metal.2020.3604","url":null,"abstract":"Additive Manufacturing (AM) is an attractive way of producing parts of intermetallic titanium alloys. However, high brittleness of these alloys makes it challenging to produce crack-free intermetallic parts by AM. One way to overcome this problem is to use high-temperature powder-bed preheating. In this paper, Ti-48Al-2Cr-2Nb alloy was obtained by selective laser melting process with high-temperature preheating of 800-900 ºC. Crack-free specimens with a relative density of 99.9% were fabricated using an optimized process parameter set. Microstructure and phase composition were studied using scanning electron microscopy and X-Ray diffraction to reveal a fine microstructure consisting of lamellar α2/γ colonies, equiaxed γ grains, and retained β phase. Compressive tests and microhardness measurements showed that the produced alloy exhibited superior properties compared to the conventionally obtained TiAl-alloy. reports the results of the investigation of L-PBF process using Ti-48Al-2Cr-2Nb alloy powder with an inductive high-temperature platform preheating. The effects of L-PBF process parameters and preheating temperature on fabricated TiAl-alloy microstructure and mechanical properties are investigated.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89655736","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: 4

THE TECHNOLOGY FOR THE REDUCTION OF METAL OXIDES USING WASTE POLYETHYLENE MATERIALS 利用废旧聚乙烯材料减少金属氧化物的技术

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3592

Sh. T. Khojiev, S. Matkarimov, Etibor Tukhtaboy kizi Narkulova, Z. Matkarimov, Nasiba Yuldasheva

{"title":"THE TECHNOLOGY FOR THE REDUCTION OF METAL OXIDES USING WASTE POLYETHYLENE MATERIALS","authors":"Sh. T. Khojiev, S. Matkarimov, Etibor Tukhtaboy kizi Narkulova, Z. Matkarimov, Nasiba Yuldasheva","doi":"10.37904/metal.2020.3592","DOIUrl":"https://doi.org/10.37904/metal.2020.3592","url":null,"abstract":"The study relates to the processing of zinc-containing wastes of metallurgical production using products of joint pyrolysis of polyethylene wastes and wood pods. The process is carried out in two stages: preparation of polyethylene waste for the operation and then the recovery process. Zinc-containing wastes are thickened, dehydrated to a moisture content of not more than 10 - 13%, mixed with a reducing agent. Dehydrated Zinc-containing wastes (cake or sludge) are mixed with synthetic reducing agents in a mass ratio cake - artificial reducing agent from 8.8: 2.2 to 8.2: 2.8, respectively, and pelletized. They carry out reductive heat treatment of pelletized waste in the presence of a reliable carbon-containing reducing agent in the amount of 20-40% by weight of the processed waste and the resulting products of the combined pyrolysis of polyethylene waste and wood pods with counter current air blasting in a rotary kiln, distillation of zinc and trapping of sublimates to produce zinc oxides. Moreover, before igniting a reliable, reducing agent and pyrolysis products of polyethylene wastes (synthetic reducing agent), gaseous fuel is burned in the working volume of the furnace. This study will increase the intensity of the processes of sublimation of zinc and reduction of iron, increase the degree of utilization of polymer waste.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77046965","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: 5

Improving performance and service life of Rail vehicles components by twin wire arc spraying 采用双线电弧喷涂技术提高轨道车辆部件的性能和使用寿命

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3570

P. Šulcová, M. Vostřák, J. Antoš, K. Lencová

{"title":"Improving performance and service life of Rail vehicles components by twin wire arc spraying","authors":"P. Šulcová, M. Vostřák, J. Antoš, K. Lencová","doi":"10.37904/metal.2020.3570","DOIUrl":"https://doi.org/10.37904/metal.2020.3570","url":null,"abstract":"The components of rail vehicles are strained by a number of sources, whether operational, natural, or effects caused by passengers. For protection against these influences, the number of types of surface protection is frequently used. The project called “Increasing of resistance of rail vehicles components by the means of modern thermal spraying technologies” deals with improving the performance and service life of rail vehicle components by thermal spraying. In the project, more than ten components are selected for coating by different material sprayed by different methods of thermal spraying. This paper is focused on coating made by Twin Wire Arc Spraying. Three materials of coating sprayed by TWAS were tested and their mechanical properties were evaluated in this paper. These materials are pure molybdenum, Fe13Cr, and Zn15Al. The Ball on Flat, Dry Sand/Rubber wheel Test, and Erosion Wear Resistance Test were done. The molybdenum coating showed very good sliding properties. This material can find its application for rolling components such as rollers, or rollers carriers. The Fe13Cr and Zn15Al coatings showed a very good erosion resistance. The Zn15Al had even a better erosion resistance than Fe13Cr. Both of these materials can be used, where this type of wear resistance is required, for example for walkable footplates. The Fe13Cr had also a very good abrasive resistance in contrast with Zn15Al, which can’t be recommended for application where abrasion resistance is required. The spraying of real components is also shortly presented in this paper.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83068545","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 vacuum on adjusting parameters of high pressure die casting parts from alloy AlSi9Cu3(Fe) 真空对AlSi9Cu3(Fe)合金高压压铸件调整参数的影响

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3630

M. Ferdyn, J. Piątkowski

引用次数: 0

SMALL PUNCH TESTING OF THICK WALLED PIPE MADE OF THE STEEL P92 WITH HETEROGENEOUS MICROSTRUCTURE 非均匀组织p92钢厚壁管的小冲孔试验

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3512

Z. Kuboň

引用次数: 0

EXPERIMENTAL AND THEORETICAL DETERMINATION OF SPECIFIC HEATS, PHASE TRANSFORMATIONS TEMPERATURES AND ENTHALPY OF Fe-C-Cr-Ni ALLOWS 实验和理论确定比热，相变温度和焓的铁- c - cr - ni允许

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3530

S. Sorokina, B. Smetana, Ľ. Drozdová, M. Kawuloková, S. Zlá

引用次数: 0

Microstructure investigation and mechanical properties of Ti-6Al-2Sn-4Zr-6Mo alloy processed by hot rolling and solution treatment 热轧固溶处理Ti-6Al-2Sn-4Zr-6Mo合金组织与力学性能研究

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3580

M. H. Alluaibi, Saleh Sabah Alturaihi, D. Raducanu, Adrian Rusea, I. Cincă, A. Nocivin, V. Cojocaru

{"title":"Microstructure investigation and mechanical properties of Ti-6Al-2Sn-4Zr-6Mo alloy processed by hot rolling and solution treatment","authors":"M. H. Alluaibi, Saleh Sabah Alturaihi, D. Raducanu, Adrian Rusea, I. Cincă, A. Nocivin, V. Cojocaru","doi":"10.37904/metal.2020.3580","DOIUrl":"https://doi.org/10.37904/metal.2020.3580","url":null,"abstract":"The Ti-6Al-2Sn-4Zr-6Mo (Ti-6246) titanium alloy is categorized as one of α + β titanium alloys group, which plays an important role in the aerospace applications. This study aims to find out the optimal thermomechanical processing route to obtain a good balance of strength, ductility and fracture toughness. The Ti-6246 alloy was hot-deformed at a temperature of 900°C, with a total deformation degree of approximately 60%, and heattreated by a solution treating at temperatures between 800°C 1000°C for 18 minutes. The microstructural evolution, mechanical properties and fractography analysis were investigated. Results revealed that the volume fraction of the primary α (αp) phase decreases progressively until it is completely dissolved with increasing solution temperature; the secondary α (αs) phase increases whereas its width decrease with increasing solution temperature, and also the yield stress and ultimate tensile strength decrease with increasing solution temperature. A good balance of ultimate tensile strength and ductility was obtained in the case of a solution temperature of 900°C, which showed a tensile strength close to 812±4 MPa and an elongation close to 11.1±2.4 %. The fine αs phase facilitates the paths of crack propagation, meaning decrease the crack propagation resistance and decrease the ductility and fracture toughness.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75096957","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

Laser remelting of Ni-Cr-Re plasma spraying coating Ni-Cr-Re等离子喷涂涂层的激光重熔

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3562

M. Węglowski, J. Dworak, S. Dymek, I. Kalemba-Rec, A. Wrona, K. Kustra, M. Lis

{"title":"Laser remelting of Ni-Cr-Re plasma spraying coating","authors":"M. Węglowski, J. Dworak, S. Dymek, I. Kalemba-Rec, A. Wrona, K. Kustra, M. Lis","doi":"10.37904/metal.2020.3562","DOIUrl":"https://doi.org/10.37904/metal.2020.3562","url":null,"abstract":"The plasma spray technology allows spraying a wide variety of materials. Atmospheric plasma spraying (APS) consists in injecting a powder feedstock material in a plasma jet to melt and accelerate the injected particles and spray them onto a substrate. The coating growth is thus realized by the impingement and spreading of sprayed particles. This mechanism of coating formation induces the presence of pores and micro-cracks. In order to eliminate those drawbacks, laser remleting may be used to improve the properties and performances of plasma sprayed coatings. In the present paper, the Ni20%C + 20%Re coating fabricated by plasma spraying on stainless steel substrate were remelted by CO 2 laser, and the effect of laser remelting on microstructure and hardness of plasma sprayed Ni20%Cr + 20%Re coating were studied. The microstructure of plasma sprayed and laser remelted coatings were analyzed using scanning election microscopy (SEM) and energy disperse spectroscopy (EDS). The micro-hardness of coating was measured using micro-hardness tester. The results show that the laser remelted coating becomes much denser moreover, the chemical composition of the coatings becomes homogeneous","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75849340","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