Metallurgical Research & Technology最新文献_第4页

A simplified mathematical model for total temperature rise calculation in non-oriented silicon steel cold rolling deformation zone 无取向硅钢冷轧变形区总温升计算的简化数学模型

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-12-20 DOI: 10.1051/metal/2021095

Guomin Han, Hongbo Li, Yujin Liu, J. Zhang, N. Kong, Zhiyuan Hu, Lei Liu

{"title":"A simplified mathematical model for total temperature rise calculation in non-oriented silicon steel cold rolling deformation zone","authors":"Guomin Han, Hongbo Li, Yujin Liu, J. Zhang, N. Kong, Zhiyuan Hu, Lei Liu","doi":"10.1051/metal/2021095","DOIUrl":"https://doi.org/10.1051/metal/2021095","url":null,"abstract":"In tandem cold rolling, the control of the temperature of high-grade non-oriented silicon steel is a difficult problem for its large deformation resistance and the preheating procedure before rolling. And it is complicated to calculate the total temperature rise of rolling deformation zone due to the comprehensive influence of the plastic deformation heat, the friction heat and the contact heat loss. So, to precisely calculate the total temperature rise, firstly, based on the four classical cold rolling force formulas, the initial total temperature rise calculation models are established correspondingly by theoretically analyzing the temperature rise of deformation heat, the temperature rise of friction heat and the temperature drop of contact heat loss; then, the model based on the improved Lian rolling force formula is adopted, which leads to calculated best matching the measured temperature; finally, considering the complex formula calculation of the initial model, based on the influences of different rolling parameters on the total temperature rise, a simplified model for convenient calculation is proposed by the nonlinear regression analysis of the initial model calculation results and main rolling parameters, which is convenient for the actual application by the field technicians.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"4 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90960995","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

Effect of niobium and austenitizing temperature on the microstructures and properties of spray-deposited AISI M3:2 high speed steel 铌和奥氏体化温度对喷镀AISI M3:2高速钢组织和性能的影响

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-12-20 DOI: 10.1051/metal/2021097

Hebin Wang, D. Hong, L. Hou, Li Shen, P. Ou, LiFang Qiu, Zhi-gang Wang, Hong-jin Zhao

引用次数: 0

Significant impact of intercritical annealing temperature on microstructure and mechanical properties of Al substituted Si dual phase steel under ultra-rapid heating 临界间退火温度对Al取代Si双相钢超快速加热组织和力学性能的影响

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-07-01 DOI: 10.1051/metal/2021051

Y. Deng, R. Misra

引用次数: 1

Cyclic annealing versus continuous annealing of 20 wt.% chromium white cast iron 循环退火与20 wt连续退火。%铬白口铸铁

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-06-18 DOI: 10.1051/metal/2021044

S. S. Mandal, D. Mondal, K. Ghosh

{"title":"Cyclic annealing versus continuous annealing of 20 wt.% chromium white cast iron","authors":"S. S. Mandal, D. Mondal, K. Ghosh","doi":"10.1051/metal/2021044","DOIUrl":"https://doi.org/10.1051/metal/2021044","url":null,"abstract":"To destabilize as-cast microstructure of 20 wt.% chromium white iron, cyclic annealing involving repeated austenitization for short duration of 0.6 h at 900, 950, 1000, 1050 and 1100 °C followed by forced air cooling is conducted as an alternative to continuous annealing requiring austenitization for longer period of 4–6 h at the said temperatures followed by furnace cooling. Continuous austenitization destabilizes the austenite matrix through precipitation of secondary carbides and transforms the alloy depleted austenite to pearlite on furnace cooling, thereby reducing the as-cast hardness from HV 669 to HV466. In contrast, repeated austenitization not only destabilizes the austenite matrix through precipitation of secondary carbides followed by its transformation to martensite on forced air cooling, but also causes disintegration of longer eutectic carbides to shorter segments with subsequent increase in hardness to as high as HV 890. Notched impact toughness after both continuous and cyclic annealing remains uniformly at 12.0 J as compared to as-cast value of 6.0 J. Besides, an unexpected rise in abrasive wear resistance after cyclic annealing treatment makes the alloy superior than that obtained by continuous annealing treatment as practiced in industries.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"232 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77075718","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

Analyses of multi-size particle mixing behavior in an ore pre-reduction rotary kiln by discrete element method 用离散元法分析矿石预还原回转窑中多粒径颗粒混合行为

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-06-17 DOI: 10.1051/metal/2021038

Chenghong Liu, Xueyong Ding

{"title":"Analyses of multi-size particle mixing behavior in an ore pre-reduction rotary kiln by discrete element method","authors":"Chenghong Liu, Xueyong Ding","doi":"10.1051/metal/2021038","DOIUrl":"https://doi.org/10.1051/metal/2021038","url":null,"abstract":"The particle distribution in pre-reduction rotary kiln directly affects the reduction process of iron ore, and in-depth understanding of the mixing behavior is helpful to improve the product quality and productivity. The present work focused on the mixed dynamics of multi-component and multi-size systems in rotary kiln using discrete element method (DEM). We first confirmed that the final particle distribution and mixing degree are independent of the initial particle distribution, and then further discussed the influence of the key operating parameters such as rotating speed, average size ratio and filling degree on mixing behavior. The size segregation pattern of three components shows that the large particles segregated to the outer region, while the small particles were concentrated in the core region, forming an annular distribution with different particle sizes. Furthermore, the results also indicate that the rotational speed and fill degree show strong influence on the mixing time and have little influence on the mixing quality. Conversely, the average size ratio significantly affects on the mixing quality. The particle segregation is suppressed and the coal and iron ore particles are well mixed together for the whole bed when the average size of coal particles is smaller than that of iron ore particle. The findings of this work provide a reference for controlling and optimizing the particle mixing process in pre-reduction rotary kiln.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"22 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90651273","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

Study on the separation of silicon from refining slag of industrial silicon 工业硅精炼渣中硅的分离研究

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/metal/2021036

Yong Hou, Guo-hua Zhang, K. Chou

{"title":"Study on the separation of silicon from refining slag of industrial silicon","authors":"Yong Hou, Guo-hua Zhang, K. Chou","doi":"10.1051/metal/2021036","DOIUrl":"https://doi.org/10.1051/metal/2021036","url":null,"abstract":"During the process of production and refining of industrial silicon, the discharged slag usually contains more than 15 mass% of metallic silicon. However, the separation of silicon from slag is very difficult due to the close density of silicon and slag as well as the high viscosity of slag, which results in the waste of resources. In the present work, the effect of Na2O addition on the separation of silicon from slag is investigated in detail. It is found that the optimum separation condition of slag and silicon is 1723 K reacting for 60 min by adding 10 mass% Na2O to the slag. Viscosity and density are two important factors affecting the separation effect of silicon from slag. The addition of Na2O reduces the viscosity of slag and promotes the separation of silicon from slag. Even if the addition of Na2O will decrease the density of slag which is detrimental to the separation of silicon, the density variation is not the determining factor affecting the separation relative to viscosity. The separation and extraction of metallic silicon from silicon slag is of great significance for improving utilization of resources and reducing environmental pollution.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"15 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89147529","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

A comparison study of microstructure, texture and mechanical properties between two 6xxx aluminum alloys 两种6xxx铝合金组织、织构和力学性能的比较研究

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/METAL/2021013

Xiaofeng Wang, Hong Liu, Xiaobo Tang

{"title":"A comparison study of microstructure, texture and mechanical properties between two 6xxx aluminum alloys","authors":"Xiaofeng Wang, Hong Liu, Xiaobo Tang","doi":"10.1051/METAL/2021013","DOIUrl":"https://doi.org/10.1051/METAL/2021013","url":null,"abstract":"This paper investigates a comparison study of microstructure, texture and mechanical properties between two 6xxx aluminum alloys through microstructure, texture characterization and tensile test. The results show that they exhibit different microstructure, texture and mechanical properties. In comparison with the alloy sheet with a low weight ratio of Mg to Si (Si-excess), the alloy sheet with a higher weight ratio of Mg to Si (Mg-excess) and additional Zn possesses the finer as-casting and solution treated equiaxed grain structure, less particles with larger size before solution treatment, weaker recrystallization texture mainly including Cube {001} orientation and weaker mechanical properties. The low weight ratio of Mg to Si corresponds to slightly higher yield strength and ultimate tensile strength, but much higher plastic strain ration r , work hardening exponent n values and elongation. Interestingly, Portevin-Le Chatelier (PLC) effect is very prevailed in the alloy sheet with a higher weight ratio of Mg to Si and additional Zn, which is responsible for the low elongation and r value. The alloy containing a low weight ratio of Mg to Si may be beneficial to improve comprehensive mechanical property.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"4 1","pages":"211"},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89660746","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: 5

The effect of microwave pretreatment on impact crushing of lead-zinc ore 微波预处理对铅锌矿冲击破碎的影响

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/metal/2021055

Yu-long Liu, D. Ding, Chen Wenguang, N. Hu, Lingling Wu, Lin Hu, Qiucai Zhang, Zhijun Zhang, Feng Li, Xue Xilong, Zhaopeng Li, Guicheng He, Qing Yu

引用次数: 0

Effect of tool offset on microstructure and mechanical properties of dissimilar copper-brass friction stir welding 刀具偏移对异种铜-黄铜搅拌摩擦焊组织和力学性能的影响

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/METAL/2021029

H. Sadeghi, K. Amini, F. Gharavi

{"title":"Effect of tool offset on microstructure and mechanical properties of dissimilar copper-brass friction stir welding","authors":"H. Sadeghi, K. Amini, F. Gharavi","doi":"10.1051/METAL/2021029","DOIUrl":"https://doi.org/10.1051/METAL/2021029","url":null,"abstract":"This study has investigated the effect of tool offset on the mechanical behavior and microstructure of dissimilar copper and brass joints by friction stir welding (FSW). In this regard, the FSW method was used for joint with three different tool offset positions, namely center line (no offset), the copper side, and the brass alloy side. Microstructure and fracture surfaces of the specimens were examined by optical (OM) and scanning electron microscopies (SEM), respectively. Tensile, micro-hardness and bending tests were also utilized to evaluate the joints mechanical behavior. The results showed that an onion ring-shaped zone was formed with the tool offset towards the copper side, but this zone was not observed with the tool offset towards the brass alloy side. In addition, compared with the tool without offset, the tensile strength with the tool offset to copper side of 1 mm (Cu+1) increased by 33.33% and with the tool offset to brass alloy side of 1 mm (Brass+1) increased by 57.47%. The results of bending test showed that in the Brass+1 specimen, bending strength increased by approximately 5% compared with the specimen without offset. Finally, it was found that the best mechanical and microstructural properties were obtained by the tool offset of 1 mm towards the brass alloy side.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"118 1","pages":"307"},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86991365","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

Improvement of carbon segregation in cast bloom and heredity in hot-rolled bar 改进铸坯碳偏析及热轧棒材的遗传

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/metal/2021072

Mengyun Zhang, Y. Bao, Li-hua Zhao, Xin Li

引用次数: 2