High Temperature Materials and Processes最新文献_第10页

Prediction model of BOF end-point P and O contents based on PCA–GA–BP neural network 基于PCA–GA–BP神经网络的转炉终点P和O含量预测模型

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1515/htmp-2022-0050

Zhao Liu, S. Cheng, P. Liu

{"title":"Prediction model of BOF end-point P and O contents based on PCA–GA–BP neural network","authors":"Zhao Liu, S. Cheng, P. Liu","doi":"10.1515/htmp-2022-0050","DOIUrl":"https://doi.org/10.1515/htmp-2022-0050","url":null,"abstract":"Abstract Low-carbon, green and intelligent production is urgently needed in China’s iron and steel industry. Accurate prediction of liquid steel composition at the end of basic oxygen furnace (BOF) plays an important role in promoting high-quality, high-efficiency and stable production in steelmaking process. A prediction model based on the principal component analysis (PCA) – genetic algorithm (GA) – back propagation (BP) neural network is proposed for BOF end-point P and O contents of liquid steel. PCA is used to eliminate the correlation between the factors, and the obtained principal components are seen as input parameters of the BP neural network; then, GA is employed to optimize the initialized weights and thresholds of the BP neural network. The flux composition and bottom blowing are considered in the input variables. The results indicate that the prediction accuracy of the single output model is higher than that of the dual output model. The root-mean-square error of P content between predicted and actual values is 0.0015%, and that of O content is 0.0049%. Therefore, the model can provide a good reference for BOF end-point control.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"41 1","pages":"505 - 513"},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46541284","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: 7

Numerical and experimental research on solidification of T2 copper alloy during the twin-roll casting T2铜合金双辊铸轧凝固过程的数值与实验研究

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1515/htmp-2022-0012

Zheng-feng Lv, Zhengjun Sun, Zhichao Hou, Zhou-Yi Yang, Xiliang Zhang, Yinping Shi

引用次数: 2

In-phase thermomechanical fatigue studies on P92 steel with different hold time P92钢不同保温时间的相热疲劳研究

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1515/htmp-2022-0024

Xin Li, Chang-yu Zhou, X. Pan, L. Chang, Lei Lu, Guodong Zhang, F. Xue, Yanfen Zhao

{"title":"In-phase thermomechanical fatigue studies on P92 steel with different hold time","authors":"Xin Li, Chang-yu Zhou, X. Pan, L. Chang, Lei Lu, Guodong Zhang, F. Xue, Yanfen Zhao","doi":"10.1515/htmp-2022-0024","DOIUrl":"https://doi.org/10.1515/htmp-2022-0024","url":null,"abstract":"Abstract The effect of hold time with 0, 20, and 40 s on in-phase thermomechanical fatigue (TMF) behavior and life of P92 steel is investigated in this study. TMF tests are carried out under mechanical strain control with strain amplitudes of 0.4 0.4 , 0.6 0.6 , and 0.8 % 0.8text{%} , and temperature range of 550–650°C which is closely relevant to the operating condition in power plant. TMF tests are performed in a mechanical strain ratio of R = − 1 R=-1 and cycle time of 120 s. The fatigue life variation follows the sequence of N f 0 s < N f 20 s < N f 40 s {N}_{text{f}}^{0hspace{.1em}text{s}}lt {N}_{text{f}}^{20hspace{.1em}text{s}}lt {N}_{text{f}}^{40hspace{.1em}text{s}} for the same mechanical strain amplitude. In addition, the influence of hold time on fatigue life decreases with the increasing strain amplitude. A continuous softening can be observed from the cyclic stress response under all test conditions. Fractographic and microstructural tests indicate that the fracture surfaces are characterized by a multi-source cracking initiation and an oxidation phenomenon. Furthermore, a modified Ostergren model is used to predict the fatigue life and achieves a good predicted result.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"41 1","pages":"57 - 68"},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43851993","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

Effect of ambient temperature on the jet characteristics of a swirl oxygen lance with mixed injection of CO2 + O2 环境温度对混合注入CO2 + O2的旋流氧枪射流特性的影响

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1515/htmp-2022-0239

Chao Feng, K. Dong, R. Zhu, Tao Lin, Jianfeng Dong, Tao Xia, Xin Ren

{"title":"Effect of ambient temperature on the jet characteristics of a swirl oxygen lance with mixed injection of CO2 + O2","authors":"Chao Feng, K. Dong, R. Zhu, Tao Lin, Jianfeng Dong, Tao Xia, Xin Ren","doi":"10.1515/htmp-2022-0239","DOIUrl":"https://doi.org/10.1515/htmp-2022-0239","url":null,"abstract":"Abstract O2 mixed with CO2 gas has been successfully applied in converter smelting; however, up to now, there have been few studies regarding the jet characteristics of the mixed injection of the swirl oxygen lance nozzle and the influence of different ambient temperature conditions on jet characteristics compared with common nozzles. In this study, Fluent software was used to simulate the jet characteristics of a four-hole common nozzle and a four-hole swirl nozzle under four different ambient temperature conditions to inject 95% O2 + 5% CO2 and analyze the influence of different ambient temperatures on nozzle-jet characteristics. The results show that with an increase in the ambient temperature, the jet-axis velocity and nozzle centerline speed increase. Under the same distance condition, the distance between the maximum radial velocity point of the jet and the centerline of the nozzle becomes larger, with a velocity greater than that of the swirl nozzle. However, the influence of the ambient temperature on the offset of the jet centerline is small. With an increase in the ambient temperature and distance, the jet-axis temperature increases and the temperature of the nozzle centerline decreases. The research results can provide a theoretical reference for the optimal design of a CO2 + O2 swirl oxygen lance nozzle.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"41 1","pages":"635 - 649"},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43221835","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

Investigation into the thermal stability of a novel hot-work die steel 5CrNiMoVNb 新型热作模具钢5CrNiMoVNb的热稳定性研究

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1515/htmp-2022-0031

Zhiqiang Hu, Kaikun Wang

{"title":"Investigation into the thermal stability of a novel hot-work die steel 5CrNiMoVNb","authors":"Zhiqiang Hu, Kaikun Wang","doi":"10.1515/htmp-2022-0031","DOIUrl":"https://doi.org/10.1515/htmp-2022-0031","url":null,"abstract":"Abstract A novel hot-work die steel 5CrNiMoVNb is developed by optimizing the alloy composition of 5CrNiMoV steel. Thermal stability tests were carried out to compare the hardness evolution of the two steel types. The hardness reduction of 5CrNiMoVNb at 600 and 650°C was only 4.3HRC and 9.6HRC, while that of 5CrNiMoV steel at the same condition was as large as 6.5HRC and 17.5HRC, respectively, which suggests that the thermal stability of the 5CrNiMoVNb steel is more excellent. The thermal stability mechanism of 5CrNiMoVNb was studied based on microstructure analyses and thermodynamic calculations. This suggests that high tempering temperatures cause the coarsening of some carbides and suppress the recovery and recrystallization of the martensite matrix, which is the main reason for the slight decrease in the thermal stability. For the adding of the medium and strong carbide-forming elements, the carbides in 5CrNiMoVNb steel are mainly MC and M23C6 with low coarsening rate coefficient, and the content of these two carbides is almost constant below 670°C. The fine MC and M23C6 carbides showed strong pinning and dragging effects on the dislocations and suppressed martensite recovery and recrystallization. Therefore, the novel hot-work die steel showed excellent tempering softening resistance and thermal stability than 5CrNiMoV steel.","PeriodicalId":12966,"journal":{"name":"High Temperature Materials and Processes","volume":"41 1","pages":"353 - 363"},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47572819","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

THERMAL CONDUCTIVITY AND SPECIFIC HEAT OF CARBON-PLASTIC POLYMER COMPOSITE MATERIALS 碳-塑料高分子复合材料的导热系数和比热

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1615/hightempmatproc.2022044226

I. Popov, D. Y. Коnstantinov, Y. Zhukova, A. Chorny

引用次数: 0

Irradiation resistance estimation method by crystal lattice distortions fast calculation for Ni, CoCrFeNi and CoCrFeMnNi FCC-alloys 基于晶格畸变的Ni、CoCrFeNi和CoCrFeMnNi fcc -合金辐照抗力快速计算方法

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1615/hightempmatproc.2022044420

V. Uglov, N. Stepanjuk, S. Zlotski

引用次数: 0

Study of temperature coefficient of resistance of n-InSb films on i-GaAs (100) substrate and temperature sensors based on them i-GaAs(100)衬底上n-InSb薄膜电阻温度系数及其温度传感器的研究

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1615/hightempmatproc.2022043589

E. Kolesnikova, V. Uglov, A. Drapezo, A. Kuleshov, Rusalsky Dmitry

引用次数: 0

Modification of hypereutectic Al-Si alloy surface layer structure by Nb alloying under high temperature plasma impact 高温等离子体冲击下Nb合金化改性过共晶Al-Si合金表面层组织

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1615/hightempmatproc.2022043681

N. Cherenda, N. Bibik, V. Astashynski, A. Kuzmitski

引用次数: 0

Experimental analysis of pulse injectors used in the creation of plasma beams 用于产生等离子体束的脉冲注入器的实验分析

IF 1.5 4区材料科学

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI: 10.1615/hightempmatproc.2022046575

N. Batrak, Nikita Kopaleishvili, M. Kutyrev

引用次数: 0