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镀后冷却过程对热浸镀Al-Zn-Mg-Si-Re钢板锌花尺寸的影响

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轧钢 2024年第1期41卷 61-65,111页

作者：张国强宋仁伯刘军友赵帅蔡长宏北京科技大学材料科学与工程学院北京100083 鞍钢股份有限公司辽宁鞍山114021

为有效控制热浸镀钢板表面的锌花尺寸,利用相图计算、Ansys-fluent模拟及热力学计算,研究了镀后冷却过程对锌花尺寸的影响。结果表明:在55Al-Zn-1.6Mg-1.5Si-0.08Re合金镀层钢板的镀后冷却凝固过程中,影响Al枝晶生长的关键温度区间为562... 详细信息

为有效控制热浸镀钢板表面的锌花尺寸,利用相图计算、Ansys-fluent模拟及热力学计算,研究了镀后冷却过程对锌花尺寸的影响。结果表明:在55Al-Zn-1.6Mg-1.5Si-0.08Re合金镀层钢板的镀后冷却凝固过程中,影响Al枝晶生长的关键温度区间为562~386℃;在55Al-Zn-1.6Mg-1.5Si-0.08Re合金的自由凝固过程中未形成表面锌花形貌,表明热浸镀时锌花并非从55Al-Zn-1.6Mg-1.5Si-0.08Re合金表面或内部形核,形核质点位于镀层/钢基体界面的金属间化合物层;在562~386℃温度区间的冷速达到62℃/s以上时,55Al-Zn-1.6Mg-1.5Si-0.08Re镀层锌花尺寸可以达到3 mm以下。

关键词：热浸镀镀液 Al-Zn-Mg-Si-Re镀层镀后冷却锌花尺寸热力学

Size Effect of Impact Abrasive Particles on Wear and Surface Hardening Behavior of High‑Manganese Steel

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Acta Metallurgica Sinica(English Letters) 2023年第6期36卷 906-916页

作者： Yongjin Wang Chuansongxin song renbo song Zetian Ma Tom Taylor School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Swansea University Swansea SA18EPUK

The size effect of impact abrasive particles on wear and surface hardening behavior of high-manganese steel was *** wear tests were carried out on MLD-10 tester with abrasive particle sizes of 6.0–0.75 mm,*** results showed that the impact wear behavior and surface hardening mechanism of high-manganese steel were affected by the size of abrasive particles.A critical size of abrasive particle might exhibit to distinguish the impact wear *** the abrasive particle size was larger than 0.75 mm,the wear mass loss generally showed a decreasing trend with the decrease of the abrasive particle *** strengthening and mechanical twinning contributed to the good work hardening ***,effective surface hardening layer could not be formed for sample tested with particle size of 0.75 mm and the wear mass loss was the highest among all the *** weak hardening effect led to the sharp increase of the wear mass ***-in abrasives could be observed on the wear surface when the abrasive particle size was larger than 0.75 *** press-in abrasives were peeled off from the wear surface and broken,leaving deep grooves and peeling *** exchange with the sample would occur with the flow of abrasives.A large area of furrow was formed on the wear *** particle size of 0.75 mm,aggregated abrasives formed a dynamic buffer layer on the surface and the stress distribution was more *** formation of buffer layer would lower the effect of the impact load and the work hardening effect could not be fully *** mutual extrusion among the abrasives,friction wheel and sample caused plastic deformation of the worn surface during impact *** present study would help guiding to select the application field of high-manganese steel more precisely.

关键词： Abrasive particles Three-body impact wear High-manganese steel Wear mechanism Surface hardening behavior

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NM300热轧耐磨钢的低周疲劳性能

钢铁研究学报 2024年第1期36卷 129-140页

作者：安会龙颜沛霖刘需宋仁伯黄岩陈昊天河钢材料技术研究院河北石家庄050023 北京科技大学材料科学与工程学院北京100081

为了探索商用车先进耐磨部件的服役情况,了解其关键耐磨部件在行驶过程中因颠簸、天气、路况等原因抵抗疲劳失效的能力,以厚度为3.5 mm的热轧TRIP耐磨钢板NM300为研究对象,进行了低周疲劳实验。研究其在不同的应变幅值下的疲劳性能,得... 详细信息

为了探索商用车先进耐磨部件的服役情况,了解其关键耐磨部件在行驶过程中因颠簸、天气、路况等原因抵抗疲劳失效的能力,以厚度为3.5 mm的热轧TRIP耐磨钢板NM300为研究对象,进行了低周疲劳实验。研究其在不同的应变幅值下的疲劳性能,得到了循环应力响应特征曲线、应力-应变迟滞回线。研究了NM300的Masing效应,循环应力与非弹性应变的关系,循环应变与疲劳寿命的关系等,并对不同应变幅值控制下的NM300低周疲劳断裂机制进行了分析。实验结果表明:NM300在较低的应变幅值控制下表现为循环硬化,在较高的应变幅值控制下表现为循环软化,且随着应变幅值增加,NM300的循环响应应力逐渐增加。当应变幅值小于0.37%时,循环寿命可达104次以上;当应变幅值小于0.19%时,循环寿命可达105次以上。NM300的疲劳断口具有典型的疲劳断裂特征,分为3个区域:疲劳源区、裂纹扩展区和瞬断区,且随应变幅增加,裂纹扩展区面积不断减小,表面逐渐粗糙。疲劳断口的断裂形式以沿晶脆性断裂和沿晶韧性断裂为主,根据热轧耐磨钢的服役条件要求可认为其疲劳性能优良。

关键词：热轧耐磨钢低周疲劳性能迟滞回线断口形貌

冷却速率和Nb微合金化对25MnV非调质钢组织和硬度的影响

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金属热处理 2024年第8期49卷 31-36页

作者：刘运娜孙笠灿戴观文刘献达宋仁伯张朝磊河钢集团石钢公司河北石家庄050031 北京科技大学材料科学与工程学院北京100083 北京科技大学碳中和研究院北京100083

设计了含V和含V-Nb两种成分体系的非调质锻钢,在Gleeble-3800热模拟机上进行了单次压缩试验,研究了冷却速率对V和V-Nb微合金非调质钢组织和硬度的影响。结果表明,冷却速率对钢的显微组织和硬度有显著影响。V钢和V-Nb钢在连续冷却条件下,... 详细信息

设计了含V和含V-Nb两种成分体系的非调质锻钢,在Gleeble-3800热模拟机上进行了单次压缩试验,研究了冷却速率对V和V-Nb微合金非调质钢组织和硬度的影响。结果表明,冷却速率对钢的显微组织和硬度有显著影响。V钢和V-Nb钢在连续冷却条件下,在0.1~0.5℃/s冷却速率范围内,随着冷却速率的增加,铁素体含量减少,珠光体含量增多,组织得到细化;在1~3℃/s冷却速率范围内,随着冷却速率的增加,组织进一步细化,同时开始发生贝氏体相变,促进了硬度的提高。Nb元素的加入生成了大尺寸的(V,Nb)(C,N)沉淀颗粒,通过钉扎晶界和诱导晶内铁素体生成进一步细化了晶粒,同时Nb元素对C原子的溶质拖拽效应降低了V-Nb钢中的珠光体含量。在0.1~0.5℃/s冷却速率范围内,V钢较高的硬度(218~242 HV)是因为其更高的珠光体含量;在1~3℃/s冷却速率范围内,V-Nb钢较高的硬度(256~291 HV)是因为组织细化作用和更高的贝氏体含量。

关键词：非调质钢 Nb微合金化冷却速率微观组织硬度

Non-destructive corrosion study on a magnesium alloy with mechanical properties tailored for biodegradable cardiovascular stent applications

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Journal of Materials Science & Technology 2021年第7期66卷 128-138页

作者： Changhong Cai Marta M.Alves renbo song Yongjin Wang Jingyuan Li School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China Centro de Qufmica Estrutural Instituto Superior TecnicoUniversidade de LisboaAv.Rovisco Pais1049-001LisboaPortugal

AnMg-2Zn-0.6Zr-0.6Nd alloy for biodegradable cardiovascular stent applications was prepared through indirect extrusion. The alloy exhibited a superior combination of tensile yield strength(TYS), ultimate tensile strength(UTS) and elongation(EL) of about 269 MPa, 298 MPa and 25.6 %, respectively. In addition,the non-destructive electrochemical frequency modulation(EFM) technique was used for the first time to investigate the corrosion behavior of Mg alloys combined with electrochemical impedance spectroscopy(EIS) in Dulbecco’s Modified Eagle’s Medium(DMEM) and in Hank’s solution. Compared with the corrosion rate of 0.07 mm/year in Hank’s solution, lower corrosion rate of 0.03 mm/year was achieved in DMEM. The significant differences between the corrosion rate trends were discussed and related with the composition of the corrosion layer formed. Depending on the biomimetic fluids tested, different corrosion products were precipitated on the alloy’s surface: a compact and homogeneous layer of Mg_(x)Ca_(y)(PO_(4))_(z) and Zn(OH)_(2) and organic compounds was formed in DMEM, whereas a partial coverage of Mg_(x)Ca_(y)(PO_(4))_(z) and Zn(OH)_(2) was formed in Hank’s solution.

关键词： Mg-Zn-Zr-Nd alloy Mechanical property Corrosion EIS EFM

热浸镀锌低碳钢丝表面结瘤及镀层脱落分析及控制

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中国冶金 2024年第2期34卷 134-141页

作者：王海宾李坤峰贾建平王建忠狄增文宋仁伯河钢集团宣钢公司河北宣化075100 河北省钢结构用钢工程技术研究中心河北宣化075100 北京科技大学材料科学与工程学院北京100083

针对热浸镀锌低碳钢丝表面的锌瘤及镀层脱落问题,利用X射线光电子能谱、扫描电子显微镜以及能谱仪进行了成因分析,并提出了控制措施。结果表明,热浸镀锌低碳钢丝表面产生锌瘤是由于原料丝表面残留的含硅氧化物与锌液反应产生“圣德林效... 详细信息

针对热浸镀锌低碳钢丝表面的锌瘤及镀层脱落问题,利用X射线光电子能谱、扫描电子显微镜以及能谱仪进行了成因分析,并提出了控制措施。结果表明,热浸镀锌低碳钢丝表面产生锌瘤是由于原料丝表面残留的含硅氧化物与锌液反应产生“圣德林效应”,导致局部镀层增厚;镀层脱落是由于钢丝浸镀时间过长,导致塑性不佳的合金层过度生长。因此建议严格控制加热、酸洗工艺,以清除钢丝表面的氧化物残留,同时可往锌锅中加入一定量的镍和铝,以抑制“圣德林效应”的发生和防止合金层的过度长大。研究结果对提升产品质量、实现产品升级有着重要意义。

关键词：热镀锌钢丝锌瘤镀层脱落圣德林效应表面缺陷

Two-dimensional simulation on the rolling process of semi-solid 60Si2Mn by finite element method

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Journal of University of Science and Technology Beijing 2002年第4期9卷 273-276页

作者： renbo song, Yonglin Kang, Xueping Ren, Hongbo Dong, and Jiwen WangMaterials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China Mat. Sci. and Eng. Sch. Univ. of Sci. and Technol. Beijing Beijing 100083 China

The effect of various process variables on the law of metal flow for semi-solid rolling 60Si2Mn was studied by finite element method. Semi-solid 60Si2Mn can be described as compressible rigid visco-plastic porous material saturated with liquid. In terms of ther-mo-mechanical coupling condition, the distributions of stress, velocity and temperature were studied using software MARC. The simulation results show that the rigid visco-plastic model can accurately describe the semi-solid 60Si2Mn rolling process. The great deformation can achieve completely in view of low flow stress of semi-solid slurry.

关键词： finite-element analysis semi-solid thermo-mechanical coupling compressible rigid visco-plastic model rolling

改良森吉米尔法热镀锌带钢针状漏镀缺陷原因分析及控制

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电镀与涂饰 2024年第5期43卷 31-38页

作者：夏雪松张少霜梁媛媛王益民胡少梅郭瑞科宋仁伯冯贝佳邯郸钢铁集团有限责任公司河北邯郸056015 北京科技大学北京100083

[目的]探究改良森吉米尔法连续热镀锌生产线上高强支架钢表面针状漏镀缺陷的产生机理,提出相应的控制措施。[方法]通过激光共聚焦显微镜、扫描电镜等对针状漏镀缺陷的形貌特征和元素分布进行了分析。[结果]漏镀缺陷在带钢表面随机分布,... 详细信息

[目的]探究改良森吉米尔法连续热镀锌生产线上高强支架钢表面针状漏镀缺陷的产生机理,提出相应的控制措施。[方法]通过激光共聚焦显微镜、扫描电镜等对针状漏镀缺陷的形貌特征和元素分布进行了分析。[结果]漏镀缺陷在带钢表面随机分布,呈黑色针眼状。在漏镀缺陷的亚表面存在Cr、Mn等合金元素富集现象,这些合金元素在带钢表面发生外氧化,使得表面可镀性下降,从而产生针状漏镀缺陷。[结论]在明火加热段对带钢预氧化,以及在退火段促进合金元素发生内氧化,可以有效预防针状漏镀缺陷的产生。

关键词：热镀锌针状漏镀元素分布选择性氧化故障处理

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Microstructure Study on Semi-solid 60Si2Mn during Compressing

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Journal of University of Science and Technology Beijing 2001年第2期8卷 115-118页

作者： Yonglin Kang, Xiongfei Yang, renbo song, Weimin Mao, Maosheng Yang (Material Science & Engineering School, University of Science and Technology Beijing, Beijing 100083, China) Material Sci. and Eng. School University of Science and Technology Beijing 100083 China

The microstructure behavior and deformation mechanism of semi-solid 60Si2Mn fabricated by electromagnetic stirring under different deformation conditions during thixoforming are studied by means of Gleeble-1500 thermal-strain-stress simulator. The micro- structure of deformed 60Si2Mn and that of the non-deformed are compared. The results show that the grain size within deformation zone decreases as the amount of deformation increases or deformation temperature decreases, but deformation fate has small effect on grain size when the rate is very low. Besides, there is a critical amount of deformation to reduce grain size. These results offer theoretical and experimental basis for further producing semi-solid material with high melting temperature and direct forming of semi-solid slurry.

关键词： semi-solid microstructure grain size segregation, reduction