Journal of Iron and Steel Research(International)最新文献_第3页

Tensile behavior and deformation mechanism of quenching and partitioning treated steels at different deforming temperatures 不同变形温度下淬火和分配处理钢的拉伸行为及变形机理

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-11-01 DOI: 10.1016/S1006-706X(17)30160-7

Lian-bo Luo , Wei Li , Yu Gong , Li Wang , Xue-jun Jin

{"title":"Tensile behavior and deformation mechanism of quenching and partitioning treated steels at different deforming temperatures","authors":"Lian-bo Luo , Wei Li , Yu Gong , Li Wang , Xue-jun Jin","doi":"10.1016/S1006-706X(17)30160-7","DOIUrl":"10.1016/S1006-706X(17)30160-7","url":null,"abstract":"<div><p>The effects of deforming temperatures on the tensile behaviors of quenching and partitioning treated steels were investigated. It was found that the ultimate tensile strength of the steel decreased with the increasing temperature from 25 to 100 °C, reached the maximum value at 300 °C, and then declined by a significant extent when the temperature further reached 400 °C. The total elongations at 100, 200 and 300 °C are at about the same level. The steel achieved optimal mechanical properties at 300 °C due to the proper transformation behavior of retained austenite since the stability of retained austenite is largely dependent on the deforming temperature. When tested at 100 and 200 °C, the retained austenite was reluctant to transform, while at the other temperatures, about 10 vol. % of retained austenite transformed during the tensile tests. The relationship between the stability of retained austenite and the work hardening behavior of quenching and partitioning treated steels at different deforming temperatures was also studied and discussed in detail. In order to obtain excellent mechanical properties, the stability of retained austenite should be carefully controlled so that the effect of transformation-induced plasticity could take place continuously during plastic deformation.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30160-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84842265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 3

Estimation of maximum inclusion by statistics of extreme values method in bearing steel 用极值统计方法估计轴承钢中最大夹杂物

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-11-01 DOI: 10.1016/S1006-706X(17)30164-4

Chao Tian, Jian-hui Liu, Heng-chang Lu, Han Dong

{"title":"Estimation of maximum inclusion by statistics of extreme values method in bearing steel","authors":"Chao Tian, Jian-hui Liu, Heng-chang Lu, Han Dong","doi":"10.1016/S1006-706X(17)30164-4","DOIUrl":"10.1016/S1006-706X(17)30164-4","url":null,"abstract":"<div><p>A statistic method, statistics of extreme values (SEV), was described in detail, which can estimate the size of maximum inclusion in steel. The characteristic size of the maximum inclusion in a high clean bearing steel (GCr15) was evaluated by this method, and the morphology and composition of large inclusions found were analyzed by scanning electron microscopy (SEM). When standard inspection area (<em>S</em><sub>0</sub>) is 280 mm<sup>2</sup> the characteristic size of the biggest inclusion found in 30 standard inspection area is 23.93 <em>µ</em>m, and it has a 99.9% probability of the characteristic size of maximum inclusion predicted being no larger than 36.85 pm in the experimental steel. SEM result shows that large inclusions found are mainly composed of CaS, calcium-aluminate and MgO. Compositing widely exists in large inclusions in high clean bearing steel. Compared with traditional evaluation method, SEV method mainly focuses on inclusion size, and the estimation result is not affected by inclusion types. SEV method is suitable for the inclusion evaluation of high clean bearing steel.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30164-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91193442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 9

Effect of methane-hydrogen mixtures on flow and combustion of coherent jets 甲烷-氢混合物对相干射流流动和燃烧的影响

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-11-01 DOI: 10.1016/S1006-706X(17)30166-8

Ting Cheng , Kong Zhu , Kai Dong

{"title":"Effect of methane-hydrogen mixtures on flow and combustion of coherent jets","authors":"Ting Cheng , Kong Zhu , Kai Dong","doi":"10.1016/S1006-706X(17)30166-8","DOIUrl":"10.1016/S1006-706X(17)30166-8","url":null,"abstract":"<div><p>Coherent jets are widely used in electric arc furnace (EAF) steelmaking to increase the oxygen utilization and chemical reaction rates. However, the influence of fuel gas combustion on jet behavior is not fully understood yet. The flow and combustion characteristics of a coherent jet were thus investigated at steelmaking temperature using Fluent software, and a detailed chemical kinetic reaction mechanism was used in the combustion reaction model. The axial velocity and total temperature of the supersonic jet were measured via hot state experiments. The simulation results were compared with the experimental data and the empirical jet model proposed by Ito and Muchi and good consistency was obtained. The research results indicated that the potential core length of the coherent jet can be prolonged by optimizing the combustion effect of the fuel gas. Besides, the behavior of the supersonic jet in the subsonic section was also investigated, as it is an important factor for controlling the position of the oxygen lance. The investigation indicated that the attenuation of the coherent jet is more notable than that of the conventional jet in the subsonic section.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30166-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89172231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

In-situ microstructural evolutions of 5Mn steel at elevated temperature in a transmission electron microscope 5Mn钢在高温下的原位组织演变

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-11-01 DOI: 10.1016/S1006-706X(17)30161-9

Han-bo Jiang , Xi-nan Luo , Xiao-yan Zhong , Hui-hua Zhou , Cun-yu Wang , Jie Shi , Han Dong

{"title":"In-situ microstructural evolutions of 5Mn steel at elevated temperature in a transmission electron microscope","authors":"Han-bo Jiang , Xi-nan Luo , Xiao-yan Zhong , Hui-hua Zhou , Cun-yu Wang , Jie Shi , Han Dong","doi":"10.1016/S1006-706X(17)30161-9","DOIUrl":"10.1016/S1006-706X(17)30161-9","url":null,"abstract":"<div><p>The microstructural evolutions of 5Mn steel during various heat treatments have been investigated by in-situ transmission electron microscopy (TEM). The specimen of 5Mn steel was prepared using focused ion beam (FIB) milling, which allowed the selection of specific morphology of interest prior to the in-situ observation. The complete austenization at 800 °C was verified at the atomic scale by minimizing thermal expansion and sample drift in a heating holder based on micro-electro-mechanical-systems. During annealing at 650 °C, the formation of reverted austenite was dynamically observed, while the morphologies of austenite laths of 5Mn steel after in-situ heating were quite similar to that after ex-situ intercritical annealing. During annealing at 500 °C, the morphological evolution of cementite and associated Mn diffusion were investigated. It was demonstrated that a combination of FIB sampling and high temperature in-situ TEM enables us to probe the morphological evolution and elemental diffusion of specific areas of interest in steel at high spatial resolution.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30161-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77278862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 5

Temperature dependence of Lüders strain and its correlation with martensitic transformation in a medium Mn transformation-induced plasticity steel 中锰相变诱发塑性钢中l<s:1> ders应变的温度依赖性及其与马氏体相变的关系

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-11-01 DOI: 10.1016/S1006-706X(17)30156-5

Xiao-gang Wang , Ming-xin Huang

引用次数: 18

Recovery of iron and copper from copper tailings by coal-based direct reduction and magnetic separation 煤基直接还原—磁选回收铜尾矿中的铁和铜

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-10-01 DOI: 10.1016/S1006-706X(17)30145-0

Chao Ceng , Hua-jun Wang , Wen-tao Hu , Li Li , Cheng-shuai Shi

{"title":"Recovery of iron and copper from copper tailings by coal-based direct reduction and magnetic separation","authors":"Chao Ceng , Hua-jun Wang , Wen-tao Hu , Li Li , Cheng-shuai Shi","doi":"10.1016/S1006-706X(17)30145-0","DOIUrl":"10.1016/S1006-706X(17)30145-0","url":null,"abstract":"<div><h3>Abstract</h3><p>A technique comprising coal-based direct reduction followed by magnetic separation was presented to recover iron and copper from copper slag flotation tailings. Optimal process parameters, such as reductant and additive ratios, reduction temperature, and reduction time, were experimentally determined and found to be as follows: a limestone ratio of 25%, a bitumite ratio of 30%, and reduction roasting at 1473 K for 90 min. Under these conditions, copper-bearing iron powders (CIP) with an iron content of 90.11% and copper content of 0.86%, indicating iron and copper recoveries of 87.25% and 83.44% respectively, were effectively obtained. Scanning electron microscopy and energy dispersive spectroscopy of the CIP revealed that some tiny copper particles were embedded in metal iron and some copper formed alloy with iron, which was difficult to achieve the separation of these two metals. Thus, the copper went into magnetic products by magnetic separation. Adding copper into the steel can produce weathering steel. Therefore, the CIP can be used as an inexpensive raw material for weathering steel.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30145-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88290871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 22

Microstructural evolution of Al-Si coating and its influence on high temperature tribological behavior of ultra-high strength steel against H13 steel Al-Si涂层的组织演变及其对超高强度钢对H13钢高温摩擦学性能的影响

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-10-01 DOI: 10.1016/S1006-706X(17)30152-8

Meng-xuan Guo, Kai-xiang Gao, Wu-rong Wang, Xi-cheng Wei

{"title":"Microstructural evolution of Al-Si coating and its influence on high temperature tribological behavior of ultra-high strength steel against H13 steel","authors":"Meng-xuan Guo, Kai-xiang Gao, Wu-rong Wang, Xi-cheng Wei","doi":"10.1016/S1006-706X(17)30152-8","DOIUrl":"10.1016/S1006-706X(17)30152-8","url":null,"abstract":"<div><h3>Abstract</h3><p>Al-Si coated ultra-high strength steel (UHSS) has been commonly applied in hot stamping process. The influence of austenitizing temperature on microstructure of Al-Si coating of UHSS during hot stamping process and its tribological behavior against H13 steel under elevated temperature were simulatively investigated. The austenitizing temperature of Al-Si coated UHSS and its microstructual evolution were confirmed and analyzed by differential scanning calorimetry and scanning electron microscopy. A novel approach to tribological testing by replicating hot stamping process temperature history was presented. Results show that the hard and stable phases Fe<sub>2</sub>Al<sub>5</sub> + FeAl<sub>2</sub> formed on Al-Si coating surface after exposure to 930 °C for 5 min, which was found to be correlated to the tribological behavior of coating. The friction coefficient of coated steel was more stable and higher than that of uncoated one. The main wear mechanism of Al-Si coated UHSS was adhesion wear, while abrasive wear was dominant for the uncoated UHSS.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30152-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89942749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 6

Three-dimensional structure and micro-mechanical properties of iron ore sinter 铁矿烧结矿三维结构与微观力学性能

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-10-01 DOI: 10.1016/S1006-706X(17)30146-2

Wei Wang , Ming Deng , Run-sheng Xu , Wei-bo Xu , Ze-lin Ouyang , Xiao-bo Huang , Zheng-liang Xue

{"title":"Three-dimensional structure and micro-mechanical properties of iron ore sinter","authors":"Wei Wang , Ming Deng , Run-sheng Xu , Wei-bo Xu , Ze-lin Ouyang , Xiao-bo Huang , Zheng-liang Xue","doi":"10.1016/S1006-706X(17)30146-2","DOIUrl":"10.1016/S1006-706X(17)30146-2","url":null,"abstract":"<div><h3>Abstract</h3><p>A new analysis method based on serial sectioning and three-dimensional (3D) reconstruction was developed to characterize the mineral microstructure of iron ore sinter. Through the 3D reconstruction of two types of iron ore sinters, the morphology and distribution of minerals in three-dimensional space were analyzed, and the volume fraction of minerals in a 3D image was calculated based on their pixel points. In addition, the microhardness of minerals was measured with a Vickers hardness tester. Notably, different mineral compositions and distributions are obtained in these two sinters. The calcium ferrite in Sinter 1 is dendritic with many interconnected pores, and these grains are crisscrossed and interwoven; the calcium ferrite in Sinter 2 is strip shaped and interweaves with magnetite, silicate and columnar pores. The calculated mineral contents based on a two-dimensional region are clearly different among various layers. Quantitative analysis shows that Sinter 1 contains a greater amount of calcium ferrite and hematite, whereas Sinter 2 contains more magnetite and silicate. The microhardness of minerals from highest to lowest is hematite, calcium ferrite, magnetite and silicate. Thus, Sinter 1 has a greater tumbler strength than Sinter 2.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30146-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78403918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 9

Sintering flue gas desulfurization with different carbon materials modified by microwave irradiation 微波辐照改性不同碳材料烧结烟气脱硫

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-10-01 DOI: 10.1016/S1006-706X(17)30143-7

Shan Ren, Fu-qiang Guo, Qi Zhao, Jie Yang, Lu Yao, Ming Kong

{"title":"Sintering flue gas desulfurization with different carbon materials modified by microwave irradiation","authors":"Shan Ren, Fu-qiang Guo, Qi Zhao, Jie Yang, Lu Yao, Ming Kong","doi":"10.1016/S1006-706X(17)30143-7","DOIUrl":"10.1016/S1006-706X(17)30143-7","url":null,"abstract":"<div><h3>Abstract</h3><p>Modification of metallurgical coke, biomass char and semi-coke was carried out using a microwave device with power of 450–850 W and irradiation time of 6–12 min. The desulfurization rates of three carbon materials before and after modification were tested. The effects of microwave power and irradiation time on the pore texture and surface chemical characteristics of the three carbon materials were examined by SEM, BET and Fourier transform infrared spectroscopy (FTIR). The results showed that the specific surface area, total pore volume and pore diameter of biomass char and semi-coke after irradiation decreased slightly. Noteworthily, the pore diameter turned small and the acidic functional groups on their surface decomposed, thereby the basicity of carbon surface increased by microwave modification. The optimal promotion of desulfurization rate of three carbon materials was semi-coke irradiated at 850 W for 9 min and the sulfur dioxide adsorption rate was up to 45%.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30143-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80162221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 11

Corrosion mechanism research and microstructure analysis of Baosteel No. 3 blast furnace hearth 宝钢3号高炉炉底腐蚀机理研究及显微组织分析

2区材料科学

Journal of Iron and Steel Research(International) Pub Date : 2017-10-01 DOI: 10.1016/S1006-706X(17)30148-6

Xun-fu Wang , Qi-jie Zhai

{"title":"Corrosion mechanism research and microstructure analysis of Baosteel No. 3 blast furnace hearth","authors":"Xun-fu Wang , Qi-jie Zhai","doi":"10.1016/S1006-706X(17)30148-6","DOIUrl":"10.1016/S1006-706X(17)30148-6","url":null,"abstract":"<div><h3>Abstract</h3><p>Baosteel No. 3 blast furnace hearth was divided into tuyere area, taphole area, taphole upper side wall and taphole lower side wall according to different working situations. Through chemical composition analysis, scanning electron microscopy, X-ray diffraction, energy dispersive spectrometry and other means, chemical composition and microstructure of different parts of hearth carbon brick were analyzed and markedly different corrosion mechanisms of these areas were found. Zn element in form of ZnO mainly deposited on the hot side of carbon brick. There was no obvious evidence that Zn permeates into carbon bricks and erodes them. Except for taphole area, K, Na, and Fe contents from hot side to cold side gradually rise and fall, resulting in the decrease of apparent porosity, the increase of density and the higher thermal conductivity compared with those of new carbon brick. The higher content of Fe in carbon brick leads to more serious erosion because Fe has greatly changed the physical properties of carbon brick. In the taphole area, the contents of Si and Al present obvious concentration gradient because of the mechanical souring of molten iron and slag. The SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> particles that have different expansion factors with carbon brick damaged the carbon substrate because of temperature fluctuation. The graphitized carbon found on H4 where is the most serious corrosion site means that the carbon brick ever directly contacts with molten iron.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30148-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73506473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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