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Journal of University of Science and Technology Beijing 2008年第1期15卷 38-42页

作者： Aimin Guo Xinli Song Jinquan Tang zexi yuan School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Hubei Province Key Laboratory of Ceramics and Refractories Wuhan University of Science and Technology Wuhan 430081 China

The effect of tempering temperature on the microstructure and mechanical properties of ultra-high strength, copperbearing, low-carbon bainitic steel has been investigated in the experiment. The results showed that the microstructure was mainly the laths of bainite in the as-quenched steel. The bainitic laths were restored and combined after the steel tempered at various tempera- tures. There were rnartensite/austenite （M/A） islands and numerous dislocations within and between the bainitic laths, while very t-me precipitates of ε-Cu were also observed within the laths. With increasing the tempered temperature from 400 to 600℃, the yield strength （YS） increased from 877 to 957 MPa, whereas the ultimate tensile strength （UTS） decreased from 1020 to 985 MPa. The Charpy V-notch （CVN） varied from 68.5 to 42 J, and the value was minimal for the steel tempered at 500℃. 2008 University of Science and Technology Beijing. All rights reserved.

关键词： low carbon bainite copper-bearing steel precipitation mechanical properties

Effect of Phosphorus Grain Boundaries Segregation and Precipitations on Mechanical Properties for Ti-IF Steel after Recrystallization Annealing

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Journal of Materials Science & Technology 2010年第9期26卷 793-797页

作者： Xinli Song zexi yuan Juan Jia Di Wang Pinghe Li Zhaojun Deng Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University ofScience and Technology Wuhan 430081 China Iron and Steel Research' Center Wuhan' Iron and Steel Group Corporation Wuhan 430080 China

The cold-rolled（75% reduction ratio） Ti-IF（interstitial-free） steels of 1 mm thickness were recrystallized by annealing at 810°C for different *** microstructure,mechanical properties and phosphorus segregation at grain boundary were investigated by means of optical microscopy（OM）,tensile testing and field emission transmission electron microscopy（FE-TEM）.It was observed that recrystallization was completed after annealing at 810°C for 180 *** yield strength and tensile strength decreased as annealing time *** FE-TEM observation showed that after the annealing treatment,the grain boundary was broadened and the dislocations with higher density of phosphorus atoms and phosphide at grain boundaries became *** amount of phosphorus segregated at grain boundaries increased with annealing time.

关键词： IF(interstitial-free) steel Segregation Mechanical properties Recrystallization annealing

Improved Removal Efficiency of Submicron Inclusions in Non-oriented Silicon Steel during RH Process

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Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1122-1127页

作者： CHEN Tianying JIN Yan CHENG Zhaoyang yuan zexi BI Yunjie LIU Jing The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China

To improve the removal efficiency of such submicron inclusions,we designed an argon blowing method for an RH facility based on mathematical *** effect of the argon blowing on the liquid steel flow and the movement of submicron inclusions was studied using the k-ε flow model coupled with the DPM model for inclusion movement based on fluid computational dynamics in *** was found that a more uniform argon flow can be achieved in the up-leg snorkel with a new nozzle position and inner diameter,which resulted in a favorable up-lifting and mixing *** new design also increased the circulation rate of molten steel in the RH *** increased turbulent kinetic energy and turbulent dispersing rate enhanced the collision probability of submicron inclusions,which results in an improved removal for 0.5-1 μm *** proposed RH facility could increase the removal rate of submicron inclusions from the original 57.1% to 66.4%,which improves the magnetic properties of non-oriented silicon steel.

关键词： RH treatment argon blowing method model optimization submicron inclusions numerical simulation

Antenna selection based on large-scale fading for distributed MIMO systems

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High Technology Letters 2016年第3期22卷 233-240页

作者：施荣华 yuan zexi Dong Jian Lei Wentai Peng Chunhua School of Information Science and Engineering Central South University

An antenna selection algorithm based on large-scale fading between the transmitter and receiver is proposed for the uplink receive antenna selection in distributed multiple-input multiple-output(D-MIMO) systems. By utilizing the radio access units(RAU) selection based on large-scale fading,the proposed algorithm decreases enormously the computational complexity. Based on the characteristics of distributed systems,an improved particle swarm optimization(PSO) has been proposed for the antenna selection after the RAU selection. In order to apply the improved PSO algorithm better in antenna selection,a general form of channel capacity was transformed into a binary expression by analyzing the formula of channel capacity. The proposed algorithm can make full use of the advantages of D-MIMO systems,and achieve near-optimal performance in terms of channel capacity with low computational complexity.

关键词： distributed MIMO systems antenna selection particle swarm optimization large-scale fading

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硅钢正火时的析出行为

金属热处理 2016年第11期41卷 6-9页

作者：张扬袁泽喜武汉科技大学材料与冶金学院湖北武汉430081

采用氮化硅铁和高纯氮气作为含3%Si的取向硅钢抑制剂的氮源,在1340℃的热轧温度下,借助OM和TEM观察和分析,研究两种不同的正火工艺对钢板中抑制剂析出的种类、大小、数量、均匀程度的影响。结果表明:在热轧态后对钢板进行正火处理有利... 详细信息

采用氮化硅铁和高纯氮气作为含3%Si的取向硅钢抑制剂的氮源,在1340℃的热轧温度下,借助OM和TEM观察和分析,研究两种不同的正火工艺对钢板中抑制剂析出的种类、大小、数量、均匀程度的影响。结果表明:在热轧态后对钢板进行正火处理有利于抑制剂的析出,从而可以利用氮气取代氮化硅铁作为氮源来生产取向硅钢。

关键词：取向硅钢抑制剂热轧正火

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Sb对镁合金组织和力学性能的影响

特种铸造及有色合金 2005年第9期25卷 567-569页

作者：汪正保刘静袁泽喜武汉科技大学

借助SEM、XRD等现代分析技术分析了Sb含量为0.4%时对镁合金组织和力学性能的影响,研究了Sb对镁合金的强化机理。结果表明,Sb可以细化AZ91D镁合金的组织、改善Mg17Al12相形态和分布,并生成新的强化相Mg3Sb2;Sb在稀土阻燃镁合金中,可以减... 详细信息

借助SEM、XRD等现代分析技术分析了Sb含量为0.4%时对镁合金组织和力学性能的影响,研究了Sb对镁合金的强化机理。结果表明,Sb可以细化AZ91D镁合金的组织、改善Mg17Al12相形态和分布,并生成新的强化相Mg3Sb2;Sb在稀土阻燃镁合金中,可以减少棒状Al11RE3相,并形成颗粒状CeSb相,使镁合金的抗拉强度提高。

关键词： Sb 镁合金金相组织力学性能

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不同淬火工艺对D2钢组织与性能的影响

金属热处理 2015年第4期40卷 117-120页

作者：林希峰袁泽喜李念武汉科技大学材料与冶金学院湖北武汉430081

研究了不同淬火温度、不同冷却方式对新型D2钢硬度及组织的影响。讨论了不同淬火温度下新型D2钢组织和性能变化的原因。结果表明,随着淬火温度的升高,在水冷、油冷、雾冷、风冷等冷却方式下,试样的硬度值都大致呈现先升高后降低的趋势,... 详细信息

研究了不同淬火温度、不同冷却方式对新型D2钢硬度及组织的影响。讨论了不同淬火温度下新型D2钢组织和性能变化的原因。结果表明,随着淬火温度的升高,在水冷、油冷、雾冷、风冷等冷却方式下,试样的硬度值都大致呈现先升高后降低的趋势,同时试样的硬度峰值出现在不同的淬火温度,水冷的硬度峰值在980℃。油冷的硬度峰值出现在980℃和1020℃。而雾冷和风冷,获得硬度峰值的淬火温度出现在980℃和1040℃左右,在1040℃淬火其峰值硬度达到61 HRC。

关键词： D2钢淬火工艺冷却方式组织性能

V的析出对中碳锰非调质钢热塑性及组织的影响

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金属热处理 2020年第10期45卷 158-163页

作者：方剑胡章咏袁泽喜黄冈师范学院机电与汽车工程学院湖北黄冈438000 武汉科技大学材料与冶金学院湖北武汉430081

通过热模拟试验,对比分析不加V和加V两种中碳锰非调质试验钢的高温力学性能和组织,探讨V的析出对热塑性及组织的影响。结果表明,高温形变诱导析出的V(C、N)可抑制动态再结晶行为、提高变形抗力并促进晶内铁素体转变,使热塑性降低、高塑... 详细信息

通过热模拟试验,对比分析不加V和加V两种中碳锰非调质试验钢的高温力学性能和组织,探讨V的析出对热塑性及组织的影响。结果表明,高温形变诱导析出的V(C、N)可抑制动态再结晶行为、提高变形抗力并促进晶内铁素体转变,使热塑性降低、高塑性温度区变窄、低塑性温度区变宽,而VC主要在奥氏体向铁素体转变时沿γ/α界面的形核析出,并有利于铁素体向晶内长大。不加V和加V的试验钢经1280℃固溶处理后,高温变形分别在900~1100℃和1000~1130℃时,可获得高的热塑性。

关键词：非调质钢热塑性组织 V的析出

Ca处理对Ti大线能量焊接非调质低合金高强钢组织与性能的影响

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材料导报（纳米与新材料专辑） 2008年第3期22卷 166-168页

作者：张莉芹袁泽喜武汉科技大学理学院材料物理系武汉430081

研究了Ca处理对含Ti大线能量焊接非调质低合金高强钢的组织与性能的影响。Ca处理钢组织结构得到细化,大线能量焊接热模拟热影响区(HAZ)晶界铁素体生长被抑制,其钢板及HAZ的强韧性均得到有效提高。Ca处理使含Ti钢热影响区氧硫化物复合夹... 详细信息

研究了Ca处理对含Ti大线能量焊接非调质低合金高强钢的组织与性能的影响。Ca处理钢组织结构得到细化,大线能量焊接热模拟热影响区(HAZ)晶界铁素体生长被抑制,其钢板及HAZ的强韧性均得到有效提高。Ca处理使含Ti钢热影响区氧硫化物复合夹杂物由片条状转变成球状,并从TiMnOS占主导变为TiCaMnOS-Al_2O_3占主导,提高了晶内针状铁素体形核能力。

关键词： Ca处理大线能量焊接晶内针状铁素体性能

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X80钢三点弯曲裂纹扩展试验及有限元模拟

兵器材料科学与工程 2020年第3期43卷 99-103页

作者：方剑邱保文袁泽喜黄冈师范学院机电与汽车工程学院湖北黄冈438000 宝钢股份中央研究院武汉分院湖北武汉430080 武汉科技大学材料与冶金学院湖北武汉430081

通过三点弯曲加载方式对X80钢进行裂纹扩展试验,采用GTN模型对裂纹扩展进行有限元模拟分析。结果表明:试样中心部位孔洞充分扩张,边缘部位小孔洞沿滑移带不断形核聚合,裂纹扩展量由试样中心向厚度边缘逐渐降低,形成类似草帽的宏观形貌;... 详细信息

通过三点弯曲加载方式对X80钢进行裂纹扩展试验,采用GTN模型对裂纹扩展进行有限元模拟分析。结果表明:试样中心部位孔洞充分扩张,边缘部位小孔洞沿滑移带不断形核聚合,裂纹扩展量由试样中心向厚度边缘逐渐降低,形成类似草帽的宏观形貌;孔洞初始体积分数φ0对GTN模型预测结果影响显著,当试样厚度中心和边缘部位的φ0分别为0.0015和0.0002时,可获得与试验较接近的有限元模拟结果。

关键词： X80管线钢裂纹扩展 GTN模型有限元模拟