High Temperature Materials and Processes最新文献

De-chlorination of poly(vinyl) chloride using Fe2O3 and the improvement of chlorine fixing ratio in FeCl2 by SiO2 addition 使用 Fe2O3 对聚氯乙烯进行脱氯处理以及通过添加 SiO2 提高 FeCl2 中的氯固定率

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2024-01-01 DOI: 10.1515/htmp-2022-0299

Lan Hong, Tai-lin Li, Lin-hai Ye

{"title":"De-chlorination of poly(vinyl) chloride using Fe2O3 and the improvement of chlorine fixing ratio in FeCl2 by SiO2 addition","authors":"Lan Hong, Tai-lin Li, Lin-hai Ye","doi":"10.1515/htmp-2022-0299","DOIUrl":"https://doi.org/10.1515/htmp-2022-0299","url":null,"abstract":"Abstract A quantitative investigation of poly(vinyl) chloride (PVC) de-chlorination using Fe2O3, together with the impact of SiO2 addition on the co-pyrolysis of PVC and Fe2O3, was conducted below 673 K in an Ar atmosphere aiming to cut the emission of gaseous Cl⁻ products. It was found that chlorine in PVC can be fixed in FeCl2 by the reaction between PVC and Fe2O3. The co-pyrolysis of PVC and Fe2O3 proceeds in two stages with a temperature boundary of around 543 K. Below 543 K, a direct reaction occurs between PVC and Fe2O3, resulting in a small mass loss ratio and some extent of chlorine fixing ratio in FeCl2. However, above 543 K, PVC starts to decompose to release gaseous H2, HCl, etc., which react with Fe2O3 through two possible pathways to form FeCl2. In Pathway 1, first Fe2O3 is reduced to Fe3O4 by H2, followed by the chlorination of Fe3O4 to FeCl2 by HCl. In Pathway 2, first Fe2O3 is chlorinated to FeCl3 by HCl, followed by the reduction of FeCl3 to FeCl2 by H2. The chlorine fixing ratio in FeCl2 and the volatile generation ratio increase with decreasing PVC content in the initial mixtures. The addition of SiO2 promotes the chlorine fixing ratio in FeCl2 and volatile generation, and the impact gets stronger with decreasing PVC content in the mixtures. The chlorine fixing ratio is increased from 70.8 to 82.6% by SiO2 addition for the mixtures containing 25% PVC, whereas the difference in the chlorine fixing ratio in FeCl2 caused by SiO2 addition is negligible for the mixtures containing 90% PVC. Fayalite (Fe2SiO4) was not detected in the solid residues after the experiments. After separating FeCl2 using water leaching, the filter residue, a composite of iron oxide and conjugated polyene, can be used as a raw material for iron-making.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"6 10","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139455548","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

Analysis of the evolution law of oxide inclusions in U75V heavy rail steel during the LF–RH refining process U75V重轨钢LF-RH精炼过程中氧化物夹杂物演化规律分析

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0257

Hongbo Liu, Rongyuan Xie, Min Li, CaiDong Zhang, Hong-Liang Yao, Zhiqiang Tian, Hai Yang, Zhanlian Liu, Qian Wang, Junyang Kang

引用次数: 0

Soft sensor method of multimode BOF steelmaking endpoint carbon content and temperature based on vMF-WSAE dynamic deep learning 基于vMF-WSAE动态深度学习的多模式转炉炼钢终点含碳量和温度软测量方法

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0270

Luan Yang, Hui Liu, Fugang Chen

{"title":"Soft sensor method of multimode BOF steelmaking endpoint carbon content and temperature based on vMF-WSAE dynamic deep learning","authors":"Luan Yang, Hui Liu, Fugang Chen","doi":"10.1515/htmp-2022-0270","DOIUrl":"https://doi.org/10.1515/htmp-2022-0270","url":null,"abstract":"Abstract The difficulty of endpoint determination in basic oxygen furnace (BOF) steelmaking lies in achieving accurate real-time measurements of carbon content and temperature. For the characteristics of serious nonlinearity between process data, deep learning can perform excellent nonlinear feature representation for complex structural data. However, there is a process drift phenomenon in BOF steelmaking, and the existing deep learning-based soft sensor models cannot adapt to changes in the characteristics of samples, which may lead to their performance degradation. To deal with this problem, considering the characteristics of multimode distribution of process data, an adaptive updating deep learning model based on von-Mises Fisher (vMF) mixture model and weighted stacked autoencoder is proposed. First, the stacked autoencoder (SAE) and vMF mixture model are constructed for complex structural data, which can initially establish nonlinear mapping relationships and division of different distributions. Second, for each query sample, the basic SAE network will perform online adaptive fine-tuning according to its data with the same distribution to achieve dynamic updating. Moreover, each sample is assigned a weight according to its similarity with the query sample. Through the designed weighted loss function, the updated deep network will better match the working conditions of the query sample. Experimental studies with numerical examples and actual BOF steelmaking process data are provided to demonstrate the effectiveness of the proposed method.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49019243","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: 2

Thermodynamic analysis of vanadium distribution behavior in blast furnaces and basic oxygen furnaces 高炉和碱性氧炉中钒分布行为的热力学分析

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0259

Yang He, Chunlin Chen, Xiaodong Yang

引用次数: 0

Effect of chemical composition and heat treatment on intergranular corrosion and strength of AlMgSiCu alloys 化学成分和热处理对AlMgSiCu合金晶间腐蚀和强度的影响

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0284

O. H. Çelik, O. Yücel

{"title":"Effect of chemical composition and heat treatment on intergranular corrosion and strength of AlMgSiCu alloys","authors":"O. H. Çelik, O. Yücel","doi":"10.1515/htmp-2022-0284","DOIUrl":"https://doi.org/10.1515/htmp-2022-0284","url":null,"abstract":"Abstract The use of aluminum in chassis, bumper, and crash boxes has increased in the last 10 years with an increase in the production of electric vehicles in the automotive industry. The extrusion process has also gained importance because it allows mass production. While basic 6xxx series aluminum alloys such as 6060 and 6063 were used in the early stages of the process, later on, 6005A and 6082 alloys, which provide higher strength, have been used. Alloys with higher strength and crash ability are needed with an increase in safety requirements in automotive. In this study, the effect of chemical composition and heat treatment on the intergranular corrosion strength of 6056 alloys was examined. Another aim of this study is not only to produce high strength and ductility alloy but also to provide good corrosion resistance as automotives are used in different environments for several decades. The 6056 alloys are potential candidate materials for the new-generation electrical vehicles in the automobile industry due to their high strength, weldability, machinability, and impact resistance. Therefore, in our work, we produced 6056 alloy samples in a billet form using the direct chill casting method. Then they were homogenized, and billets were extruded as a box profile. Experimental studies were carried out on 6056 alloys with two different chemical compositions and three different heat treatment conditions (T42, T62, and T76) using Method B of EN ISO 11846 standard for corrosion testing. Crack sizes of metallographic sections from corroded areas were calculated g using a scanning electron microscope. As a result, we found that the addition of Mg to 6056 alloys improves corrosion resistance, while copper reduces it. When Zn is added to the alloys, Mg starts to react with it and forms MgZn2, which increases the corrosion progress. Moreover, when heat treatment is applied at T76 conditions, the alloys demonstrate high corrosion resistance.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43288498","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

Improvement and prediction on high temperature melting characteristics of coal ash 粉煤灰高温熔融特性的改进与预测

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0039

Yifan Chai, Xing Gao, Yanfeng Liang, Junjie Wang, Wen-ting Hu, Yi-ci Wang

引用次数: 0

SURFACE PROPERTIES OF FLUOROCARBON COATINGS PRODUCED BY LOW-FREQUENCY PLASMATRON AT ATMOSPHERIC PRESSURE 常压下低频等离子体制备氟碳涂料的表面性能

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1615/hightempmatproc.v27.i3.50

A. Shvedov, V. Elinson, P. Shchur

{"title":"SURFACE PROPERTIES OF FLUOROCARBON COATINGS PRODUCED BY LOW-FREQUENCY PLASMATRON AT ATMOSPHERIC PRESSURE","authors":"A. Shvedov, V. Elinson, P. Shchur","doi":"10.1615/hightempmatproc.v27.i3.50","DOIUrl":"https://doi.org/10.1615/hightempmatproc.v27.i3.50","url":null,"abstract":"This paper presents the results of studies conducted on coatings based on thin fluorocarbon films obtained by plasma-enhanced chemical vapor deposition using low-frequency plasmatron and low-temperature plasma at atmospheric pressure. The possibility of forming thin fluorocarbon layers by supplying a cyclohexane/carbon tetrafluoride gas mixture to substrates made of polymeric materials (polyethylene terephthalate and polystyrene) has been demonstrated and the main technological modes of deposition process have been established. The absorption spectra of the obtained coatings were studied, the influence of the gas discharge energy contribution on the concentration of fluorocarbon compounds was established, and the band gap was calculated using the Tauc method. The surface relief of the obtained structures was considered using atomic force microscopy and the root-mean-square deviation of the surface roughness was calculated, which reached a maximum of 36 ± 3 nm. Using the Oliver-Pharr method, the nanohardness and Young's modulus of elasticity of the obtained coatings were calculated, which amounted to 0.447 ± 0.025 and 6.10 ± 0.39 GPa, respectively.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"103 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80644058","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

MODEL OF HEAT TRANSFER AND CRYSTALLIZATION KINETICS IN THE HEAT-AFFECTED ZONE IN VIT 106 ALLOY IN SELECTIVE LASER MELTING vit106合金选择性激光熔化热影响区传热及结晶动力学模型

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1615/hightempmatproc.2023048119

M. Gridnev, R. Khmyrov

引用次数: 0

Study on vibration and temperature rise characteristics of full ceramic ball bearings under high temperature conditions 高温条件下全陶瓷球轴承振动与温升特性研究

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1615/hightempmatproc.2023048090

Jian Sun, Renyun Guan, Jinmei Yao, Xin Fang, Zhe Zhang, Guangxiang Zhang

引用次数: 0

Research on the behaviour and mechanism of void welding based on multiple scales 基于多尺度的空洞焊接行为与机理研究

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI: 10.1515/htmp-2022-0271

Ruxing Shi, Xingsheng Yu, Huiqin Chen, Y. Jiao, Juan Chen, Fei Chen, Sizhe He

{"title":"Research on the behaviour and mechanism of void welding based on multiple scales","authors":"Ruxing Shi, Xingsheng Yu, Huiqin Chen, Y. Jiao, Juan Chen, Fei Chen, Sizhe He","doi":"10.1515/htmp-2022-0271","DOIUrl":"https://doi.org/10.1515/htmp-2022-0271","url":null,"abstract":"Abstract As the core foundation of major national equipment, large forgings have a great influence on the national economic construction, the development of national defence equipment and the development of modern cutting-edge science and technology. In the production of large forgings, welding the internal void of forgings is a technical problem that directly affects the quality of large forgings. In view of the phenomenon of void welding in large forgings, the behaviour and mechanism of void welding were deeply studied based on the stretching test and molecular dynamics simulation, combined with a lot of theoretical analysis. The results show that multi-pass stretching deformation is a kind of plastic deformation process which can eliminate void defects. When the forging ratio reaches 2.2, the void can be welded completely and the tensile strength can be restored to the level of the matrix. With the increase of compression deformation, the stress will increase sharply, especially at the grain boundary. In addition, the main void welding mechanism of 30Cr2Ni4MoV steel is the recrystallization and grain growth mechanism. Recrystallization and grain growth are of great significance for promoting the reduction of void volume and realizing metallurgical bonding of the interface.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41784716","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: 1