steel research international最新文献_第9页

Role of Activating Flux in Weld Bead Symmetricity during Dissimilar Metal Joining 活化助焊剂对异种金属焊接过程中焊缝对称性的作用

IF 1.9 3区材料科学

steel research international Pub Date : 2024-08-08 DOI: 10.1002/srin.202400324

Petla Sivateja, Ravi Shanker Vidyarthy, Dheerendra Kumar Dwivedi

{"title":"Role of Activating Flux in Weld Bead Symmetricity during Dissimilar Metal Joining","authors":"Petla Sivateja, Ravi Shanker Vidyarthy, Dheerendra Kumar Dwivedi","doi":"10.1002/srin.202400324","DOIUrl":"10.1002/srin.202400324","url":null,"abstract":"Ferritic/martensitic steels and austenitic stainless steels are high-strength steels, and highly recommended in high-temperature and high-pressure application. In general, multimetallics with different Inconel alloys are used for joining. This is quite a complex and time-consuming procedure. The current work demonstrates the efforts made to weld 8 mm-thick P91 steel and 316L SS plates in a single pass using activating flux tungsten inert gas (A-TIG) welding process without any interlayers. The main challenge is to get the symmetric weld bead profile. Flux coating is optimized in terms of flux composition, coating density, and coating pattern to get the full penetration with symmetric appearance. The current work discusses the possible cause and their solution of asymmetricity during dissimilar welding. Differential flux coating density is found to be very effective in controlling the arc column shape, fluid flow, and consequently the bead geometry. High coating density is used in the P91 side compared to 316L side. Symmetric weld profile with full penetration is achieved by applying multicomponent flux (33–38% TiO2, 38–43% SiO2, 13–17% NiO, and 8–10% CuO) during A-TIG welding.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Effect of Substituting CaO with BaO on Viscosity and Structure of CaO–SiO2–FeOt–Al2O3–BaO Steel Slag 用 BaO 替代 CaO 对 CaO-SiO2-FeOt-Al2O3-BaO 钢渣粘度和结构的影响

IF 1.9 3区材料科学

steel research international Pub Date : 2024-08-08 DOI: 10.1002/srin.202400410

Yansong Song, Qiaomei Sun, Hongkui Zhang, Dayong Zhang, Yaoqiang Lv

{"title":"Effect of Substituting CaO with BaO on Viscosity and Structure of CaO–SiO2–FeOt–Al2O3–BaO Steel Slag","authors":"Yansong Song, Qiaomei Sun, Hongkui Zhang, Dayong Zhang, Yaoqiang Lv","doi":"10.1002/srin.202400410","DOIUrl":"10.1002/srin.202400410","url":null,"abstract":"The viscosity of CaO–SiO2–FeOt–Al2O3–BaO steel slag with the BaO substitution for CaO is measured. Calculation of the corrected optical basicity and the apparent activation energy of the steel slag are executed. The effect of substituting CaO with BaO on structure evolution is studied. The measured results show that the viscosity of molten slag increases with the BaO substitution. The values of corrected optical basicity decrease from 0.63441 to 0.62329 with the BaO substitution. The apparent activation energy shows an upward trend from 152.78 to 160.62 kJ mol−1 with the BaO substitution. The Fourier transform infrared reflection analysis indicates that the structure complexity of the [SiO4] and [AlO4] tetrahedrons is increased with the BaO substitution. The Raman analysis indicates that the translation of Q0 and Q1 to Q2 and Q3 is advanced with the substitution of BaO for CaO in molten slag. The conversion of O2− to O0 is promoted with the substitution of BaO for CaO using X-Ray photoelectron spectrometer analysis. The complexity of the molten slag network structure and the degree of polymerization are all increased by the substitution of BaO for CaO, which sits comfortably with measured viscosity results.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141927969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Influence of Part Size on Microstructure during Austempering of Medium Carbon Low-Alloy Steels 中碳低合金钢奥氏体回火过程中零件尺寸对微观结构的影响

IF 1.9 3区材料科学

steel research international Pub Date : 2024-08-05 DOI: 10.1002/srin.202400090

Priya Tiwari, Abhinav Varshney

引用次数: 0

Investigation of Basicity on Compressive Strength and Oxidation Induration Mechanism of Vanadium–Titanium Magnetite Pellets 碱度对钒钛磁铁矿球团抗压强度和氧化硬化机理的影响研究

IF 1.9 3区材料科学

steel research international Pub Date : 2024-08-05 DOI: 10.1002/srin.202400461

Song Zhang, Yanbing Zong, Yun Huang, Xiangyou Gui, Dian Lei, Jianliang Zhang, Xian Gan, Zhenyang Wang, Shushi Zhang, Peiyuan Lu

{"title":"Investigation of Basicity on Compressive Strength and Oxidation Induration Mechanism of Vanadium–Titanium Magnetite Pellets","authors":"Song Zhang, Yanbing Zong, Yun Huang, Xiangyou Gui, Dian Lei, Jianliang Zhang, Xian Gan, Zhenyang Wang, Shushi Zhang, Peiyuan Lu","doi":"10.1002/srin.202400461","DOIUrl":"10.1002/srin.202400461","url":null,"abstract":"Currently, the typical charge structure for blast furnace smelting of vanadium–titanium magnetite (VTM) is the addition of acidic pellets, high-basicity sinters, and lumps. To increase the percentage of pellets entering the blast furnace, it is necessary to transfer the basicity burden to the pellets. In this study, the effect of basicity on the phase transition and oxidation hardening mechanism of VTM pellets is investigated. In the results, it is indicated that when the preheating temperature is 950 °C, the preheating time is 15 min, the roasting temperature is 1260 °C, and the roasting time is 15 min, with the basicity (CaO/SiO2) increasing from 0.08 to 1.3, the compressive strength of pellets shows a trend of “increasing first and then decreasing,” with the highest value reaching 3159 N pellet−1 at basicity of 0.5. As the basicity increases, calcium ferrate can be generated by CaO in the liquid phase with Fe2O3 in addition to silicate with SiO2, which will increase the amount of the liquid phase. With the increase of basicity, the oxide-bonded induration is gradually weakened, and the slag-bonded induration is gradually enhanced. A moderate amount of liquid phase can play the role of bonding and filling, thereby improving compressive strength.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Mechanical Properties and Martensitic Transformation Behavior of 316LN Stainless Steel Under Cryogenic Deformation 316LN 不锈钢在低温变形下的力学性能和马氏体转变行为

IF 1.9 3区材料科学

steel research international Pub Date : 2024-08-05 DOI: 10.1002/srin.202400330

Bixi Li, Hengcheng Zhang, Shanshan Wu, Liancheng Xie, Fuzhi Shen, Jijun Xin, Chuanjun Huang, Wei Wang, Laifeng Li

{"title":"Mechanical Properties and Martensitic Transformation Behavior of 316LN Stainless Steel Under Cryogenic Deformation","authors":"Bixi Li, Hengcheng Zhang, Shanshan Wu, Liancheng Xie, Fuzhi Shen, Jijun Xin, Chuanjun Huang, Wei Wang, Laifeng Li","doi":"10.1002/srin.202400330","DOIUrl":"10.1002/srin.202400330","url":null,"abstract":"Digital image correlation (DIC) technology can capture strain anomalies and predict crack initiation providing early warning of material failure. Herein, DIC technique is used to calculate the full-field strain by analyzing the grayscale patterns of speckle images during the tensile process. This allowed for an analysis of the microstructure evolution of the 316LN austenitic stainless steel (SS) at cryogenic temperatures. Deformation behavior of the 316LN SS at cryogenic temperatures is further analyzed using electron backscatter diffraction technology and transmission electron microscopy. Based on the strain field obtained by the DIC technique, a comprehensive analysis of the martensite volume fraction at different strains can be conducted. The results show that the strain localization under cryogenic deformation is related to martensitic transformation, while the random distribution of slip bands aligns with local strain peak values. Notably, fracture under cryogenic deformation occurs in regions where the strain field reaches its peak, rather than at locations with the maximum strain value.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Experimental Study on the Characteristics and High-Temperature Heat Transfer of Secondary Cooling Nozzle for High-Efficiency Slab Continuous Casting Process 高效板坯连铸工艺二次冷却喷嘴的特性和高温传热实验研究

IF 1.9 3区材料科学

steel research international Pub Date : 2024-08-05 DOI: 10.1002/srin.202400357

Jia-kun Li, Rong-jun Xu, Ming Lv, Xiong-bo Sun, Qi Gao, Zhong-ze Du, Zhao-hui Zhang

{"title":"Experimental Study on the Characteristics and High-Temperature Heat Transfer of Secondary Cooling Nozzle for High-Efficiency Slab Continuous Casting Process","authors":"Jia-kun Li, Rong-jun Xu, Ming Lv, Xiong-bo Sun, Qi Gao, Zhong-ze Du, Zhao-hui Zhang","doi":"10.1002/srin.202400357","DOIUrl":"10.1002/srin.202400357","url":null,"abstract":"In the continuous casting process, the heat transfer effect of secondary cooling plays an important role in the quality of the slab. The cooling intensity and cooling uniformity of the secondary cooling nozzle need more efficient spray cooling to achieve. Herein, the cold characteristics of different types of nozzles were compared. It is found that the second type of air mist nozzles have more uniform water density and striking force. On this basis, high-temperature heat transfer experiments for casting billets were carried out to study the heat transfer coefficients of different air mist nozzles in the secondary cooling zone of continuous casting. It is found that the heat transfer coefficient increases as the distance of the temperature measurement point from the nozzle directly below increases. The heat transfer coefficients of the casting billet in both the jet and non-jet zones are decreasing to varying degrees. When the temperature drops to 600 °C, the second type of air mist nozzle shows a faster temperature drop at the point of measurement, a smaller difference in time taken for temperature drop between jet and non-jet zones, and faster and more uniform spraying, leading to a more significant trend of increasing heat transfer coefficient.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Influence of Additions of Flux, SiO2, and Al2O3, on the Desulfurization Efficiency of Hot Metal Using Global Desulfurization Factor 利用全局脱硫因子分析添加助熔剂、SiO2 和 Al2O3 对热金属脱硫效率的影响

IF 1.9 3区材料科学

steel research international Pub Date : 2024-08-04 DOI: 10.1002/srin.202400214

Silas Gambarine Soares, Simão Vervloet Ramos, Thiago Barreto da Silva Amaral, Mateus Costa Corona, Raphael Mariano de Souza, Eduardo Junca, Jose Roberto de Oliveira

{"title":"Analysis of the Influence of Additions of Flux, SiO2, and Al2O3, on the Desulfurization Efficiency of Hot Metal Using Global Desulfurization Factor","authors":"Silas Gambarine Soares, Simão Vervloet Ramos, Thiago Barreto da Silva Amaral, Mateus Costa Corona, Raphael Mariano de Souza, Eduardo Junca, Jose Roberto de Oliveira","doi":"10.1002/srin.202400214","DOIUrl":"10.1002/srin.202400214","url":null,"abstract":"The formation of the solid phases CaS, 3CaO.SiO2 and CaO.Al2O3 around the lime particle decreases the efficiency of desulfurization by the kanbara reactor (KR) process. The addition of fluxes reduces the formation of these phases. The addition of Al and Si can also have this effect, depending on the added levels. In this study, different mixtures based on CaO with different levels of fluorspar, sodalite (Nepheline Syenite), and SiO2 and Al2O3 content were studied and used in the desulfurization process of hot metal. These mixtures were added to a bath of liquid hot metal at 1400 °C. All experiments were performed with mechanical agitation. Samples were taken at times of 5, 10, 15, and 20 min, and analyses were performed to evaluate the variation of sulfur over time. The Thermo-Calc software was used to determine the formed phases, solid fraction, and liquid fraction of the different mixtures. With this data, different values of the Global Desulfurization Factor (FGDeS) were calculated, which was developed to evaluate and predict the efficiency of hot metal desulfurizing mixtures by the KR process. The results of showed that fluorspar was more efficient than sodalite. The FGDeS had a correlation factor (R2) above 0.9 with the desulfurization efficiency.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

New Approach for Plasma Nitrocarburizing of Stainless Steels by a Modified Reactor Configuration Using a Plasma‐Activated Solid Carbon Precursor 利用等离子体活化固体碳前驱体的改良反应器配置对不锈钢进行等离子体渗氮的新方法

IF 2.2 3区材料科学

steel research international Pub Date : 2024-08-04 DOI: 10.1002/srin.202400247

Saeed M. Jafarpour, Anke Dalke, Horst Biermann

{"title":"New Approach for Plasma Nitrocarburizing of Stainless Steels by a Modified Reactor Configuration Using a Plasma‐Activated Solid Carbon Precursor","authors":"Saeed M. Jafarpour, Anke Dalke, Horst Biermann","doi":"10.1002/srin.202400247","DOIUrl":"https://doi.org/10.1002/srin.202400247","url":null,"abstract":"Stainless steel surfaces can be modified using plasma‐assisted thermochemical treatments to improve properties like hardness, wear, and pitting corrosion resistance. To specifically adjust the desired properties, a precise control of the produced treatment‐relevant gas species with regard to their type and concentration is essential. This requires the adjustment of the parameters for the generation of the gas species, being independent from heating parameters, as well as their real‐time measurement. Therefore, this study presents the use of a plasma‐activated solid carbon precursor in a cold‐wall reactor using active screen technology and in a modified hot‐wall reactor during plasma nitrocarburizing of austenitic stainless steel. In addition, the modified hot‐wall reactor combined with a compact laser‐based absorption spectroscopy sensor for real‐time monitoring and concentration evaluation of in‐site generated gas species. It is shown that implementing a plasma‐activated solid carbon precursor in a modified hot‐wall reactor enables adjustable generation of C‐containing gas species, particularly HCN, with high production yield by an independent power management. Therefore, HCN is produced independent from heating while the limitations arising during active screen technology using a carbon screen are avoided. The presented technological development thus opens up new possibilities for better control of the plasma nitrocarburizing treatments of steels.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Oxidation Behavior of MgO‐C Refractories Containing Metallic Aluminum, Calcium Magnesium Aluminate Aggregates, and Carbores P 含金属铝、铝酸钙镁骨料和碳酸钙的氧化镁-C 耐火材料的氧化行为 P

IF 2.2 3区材料科学

steel research international Pub Date : 2024-08-04 DOI: 10.1002/srin.202400260

Anton Yehorov, Xingwen Wei, Sofia Mazepa, Anastasiia Sherstneva, Olena Volkova

引用次数: 0

Crystallization Behavior of the CaO–SiO2–Al2O3–MgO System Inclusions CaO-SiO2-Al2O3-MgO 系统包裹体的结晶行为

IF 2.2 3区材料科学

steel research international Pub Date : 2024-08-04 DOI: 10.1002/srin.202400253

Yong Wang, Sohei Sukenaga, Masanori Tashiro, Hua Zhang, Hongwei Ni, Hiroyuki Shibata

{"title":"Crystallization Behavior of the CaO–SiO2–Al2O3–MgO System Inclusions","authors":"Yong Wang, Sohei Sukenaga, Masanori Tashiro, Hua Zhang, Hongwei Ni, Hiroyuki Shibata","doi":"10.1002/srin.202400253","DOIUrl":"https://doi.org/10.1002/srin.202400253","url":null,"abstract":"The crystallization process of low melting point CaO–SiO2–Al2O3–MgO system inclusions during the continuous casting and hot rolling process greatly affects the deformability of inclusions. The effect of Al2O3 and MgO contents on the crystallization characteristics of CaO–SiO2–Al2O3–MgO system melts representing the typical oxide inclusions in Si–Mn deoxidized steels is systematically investigated. The continuous cooling transformation and time–temperature transformation experiments are carried out. The results reveal that the increase of Al2O3 contents restrains the crystallization process of the melt, whereas the crystallization tendency of the melt is promoted with the increase of MgO contents. The precipitated phases are predominately 2CaO·MgO·2SiO2 and 3CaO·MgO·2SiO2, and the primary crystalline phase is unaffected by the changes of Al2O3 and MgO contents. To obtain low melting point plasticized inclusions with limited crystallization ability, it is recommended to control the Al2O3 and MgO contents greater than 15 wt% and below 5 wt%, respectively. The isothermal treatment is suggested to be controlled within a proper temperature range (1175–1250 °C) to decrease the crystallization kinetics. The oxide system's viscosity change is the limiting kinetic factor in the crystallization process, and it can be utilized to predict the system's crystallization tendency.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141968785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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