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Effect of hot-dip galvanizing processes on the microstructure and mechanical properties of 600-MPa hot-dip galvanized dual-phase steel 被引量:3
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作者 Chun-fu Kuang Zhi-wang Zheng +2 位作者 Min-li Wang Quan Xu Shen-gen Zhang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第12期1379-1383,共5页
A C–Mn dual-phase steel was soaked at 800°C for 90 s and then either rapidly cooled to 450°C and held for 30 s(process A) or rapidly cooled to 350°C and then reheated to 450°C(process B) to simula... A C–Mn dual-phase steel was soaked at 800°C for 90 s and then either rapidly cooled to 450°C and held for 30 s(process A) or rapidly cooled to 350°C and then reheated to 450°C(process B) to simulate the hot-dip galvanizing process. The influence of the hot-dip galvanizing process on the microstructure and mechanical properties of 600-MPa hot-dip galvanized dual-phase steel(DP600) was investigated using optical microscopy, scanning electron microscopy(SEM), transmission electron microscopy(TEM), and tensile tests. The results showed that, in the case of process A, the microstructure of DP600 was composed of ferrite, martensite, and a small amount of bainite. The granular bainite was formed in the hot-dip galvanizing stage, and martensite islands were formed in the final cooling stage after hot-dip galvanizing. By contrast, in the case of process B, the microstructure of the DP600 was composed of ferrite, martensite, bainite, and cementite. In addition, compared with the yield strength(YS) of the DP600 annealed by process A, that for the DP600 annealed by process B increased by approximately 50 MPa because of the tempering of the martensite formed during rapid cooling. The work-hardening coefficient(n value) of the DP600 steel annealed by process B clearly decreased because the increase of the YS affected the computation result for the n value. However, the ultimate tensile strength(UTS) and elongation(A80) of the DP600 annealed by process B exhibited less variation compared with those of the DP600 annealed by process A. Therefore, DP600 with excellent comprehensive mechanical properties(YS = 362 MPa, UTS = 638 MPa, A_(80) = 24.3%, n = 0.17) was obtained via process A. 展开更多
关键词 hot-dip GALVANIZING process dual-phase steel MICROSTRUCTURE mechanical properties
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Effect of Hot Dip Galvanized Steel Surface Chemistry and Morphology on Titanium Hexafluoride Pretreatment
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作者 Ville Saarimaa Antti Markkula +2 位作者 Kai Arstila Jere Manni Jyrki Juhanoja 《Advances in Materials Physics and Chemistry》 2017年第2期28-41,共14页
Titanium hexafluoride pretreatments are known to improve paint adhesion and function as a barrier between the coating and the hot dip galvanized (HDG) steel surface. Interactions at the zinc/pretreatment interface are... Titanium hexafluoride pretreatments are known to improve paint adhesion and function as a barrier between the coating and the hot dip galvanized (HDG) steel surface. Interactions at the zinc/pretreatment interface are of utmost importance for the formation of pretreatment layers and the corrosion resistance of color coated hot dip galvanized steels. Removal rate of inert aluminum oxide from HDG steel samples by chemical dissolution was studied. XPS measurements showed that the surface Al2O3 layer thickness decreased rapidly already at mild alkaline cleaning, while complete removal of Al required severe etching. Low reactivity of an Al2O3-rich surface was confirmed by impaired formation of a titanium hexafluoride pretreatment layer. Grain boundaries and deformation twinnings were shown to be of importance for the reactivity of the HDG surface and for the precipitation of the pretreatment chemical. Helium ion microscopy images and electron probe microanalysis (EPMA) of a pretreated sample showed accumulation of the pretreatment chemical at the grain boundaries. Al removal rate was fast at the deformation twinnings at the grain plateaus. Slow Al removal was observed at dendritic valleys and grain boundaries. The results increase understanding of the reactivity of hot dip galvanized steel surface. 展开更多
关键词 hot dip galvanized steel Aluminum Oxide PRETREATMENT Surface MORPHOLOGY HELIUM Ion MICROSCOPY
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Evolution of appearance profile of hot-dip galvanized car-body steel sheet during deformation process
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作者 ZHAO Yanliang SHI Jinzhong DAI Yigang 《Baosteel Technical Research》 CAS 2017年第2期30-36,共7页
In recent years, the waterborne free intermediate coating process has been widely used in the automotive industry. Because the baking times and coating thickness are decreased, the surface covering capability of the p... In recent years, the waterborne free intermediate coating process has been widely used in the automotive industry. Because the baking times and coating thickness are decreased, the surface covering capability of the painting process is reduced, which directly affects the appearance quality( long-and short-wave values) of the body paint. Thus, there are correspondingly higher requirements for the white body surface profile prior to painting. The surface profile of the white body is mainly affected by the plate material, the surface profile, and the deformation process. So,the change rule for the surface profile during deformation of the steel plate is a key factor in coating appearance optimization. In this paper, we first analyze the typical deformation of the outer cover of a car body. Then ,we examine the change tendency of the surface profile of steel plates with respect to different deformation rates, specifically for a steel plate comprising a hot-dip galvanized bake-hardened steel sheet. Based on our analysis of the influence of the deformation on the coating appearance,we selected 3% ,5% ,and 8% deformation rates in this research. We found the roughness (Ra) value in the typical deformation range (3% -8% ) of the car body to exhibit a decreasing trend at first and then an increasing trend. The Ra value of the 8% deformation is not more than the original plate test value. When the Pc value of the original plate is in the lower range ( about 60), it exhibits a slight increasing trend in the deformation process (3 % -8 % ). And when the Pc value of the original plate is in the higher range ( about 120 ), it exhibits no increasing trend in the deformation process ( 3% -8% ). In contrast,the waviness (WCA) value in the car body's typical deformation range (3%-8%) shows a significant growth trend. 展开更多
关键词 automotive coating hot-dip galvanized steel sheet bake hardened steel DEFORMATION ROUGHNESS WAVINESS
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Development of Tailored Structure and Tensile Properties of Thermomechanical Treated Micro Alloyed Low Carbon Dual Phase Steel 被引量:1
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作者 Hany Khalifa G. M. Megahed +1 位作者 Taher El-Bitar Mohamed A. Taha 《Materials Sciences and Applications》 2020年第12期851-866,共16页
Direct hot rolled dual phase steel production represents a challenging route, compared with cold rolled and intercritical annealing process, due to complex and sophisticated control of the hot strip mill processing pa... Direct hot rolled dual phase steel production represents a challenging route, compared with cold rolled and intercritical annealing process, due to complex and sophisticated control of the hot strip mill processing parameters. Instead, high technology compact slab production plant offers economic advantages, adequate control and prompt use of the advanced thermomechanical controlled rolling. The current work aims to obtain different structures and tensile properties by physical simulation of direct hot rolled niobium micro alloyed dual phase low carbon steel by varying the metallurgical temperatures of hot strip mill plant. This starts with adaptation of the chemical analysis of a low carbon content to fall far from the undesired peritectic region to avoid slab cracking during casting. Thermodynamic and kinetics calculations by Thermo-Calc 2020 and JMat pro software are used to define the transformation’s temperatures Ae1 and Ae3 as well as processing temperatures;namely of reheating, finishing rolling, step cooling and coiling temperatures. The results show that the increase of finishing rolling temperature from 780<span style="white-space:nowrap;">&deg;</span>C to 840<span style="white-space:nowrap;">&deg;</span>C or decreasing either of step cooling duration at ferrite bay from 7 to 4 seconds, enhances yield and tensile strengths, all due to more martensite volume fraction formation. The yield and tensile strengths also increase with decreasing coiling temperature from 330<span style="white-space:nowrap;">&deg;</span>C to 180<span style="white-space:nowrap;">&deg;</span>C, which is explained due to the increase of dislocation densities resulted from the sudden shape change during martensite formation at the lower coiling temperature in additional to the self-tempering of martensite formed at higher coiling temperatures which soften the dual phase steel. 展开更多
关键词 Micro-Alloyed steel dual phase steel Thermomechanical Simulation Thermomechanical Rolling Compact Slab Production CSP hot Strip Mill HSM
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Formation of microstructural features in hot-dip aluminized AISI 321 stainless steel 被引量:2
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作者 Prashant Huilgol K.Rajendra Udupa K.Udaya Bhat 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2018年第2期190-198,共9页
Hot-dip aluminizing(HDA) is a proven surface coating technique for improving the oxidation and corrosion resistance of ferrous substrates. Although extensive studies on the HDA of plain carbon steels have been repor... Hot-dip aluminizing(HDA) is a proven surface coating technique for improving the oxidation and corrosion resistance of ferrous substrates. Although extensive studies on the HDA of plain carbon steels have been reported, studies on the HDA of stainless steels are limited. Because of the technological importance of stainless steels in high-temperature applications, studies of their microstructural development during HDA are needed. In the present investigation, the HDA of AISI 321 stainless steel was carried out in a pure Al bath. The microstructural features of the coating were studied using scanning electron microscopy and transmission electron microscopy. These studies revealed that the coating consists of two regions: an Al top coat and an aluminide layer at the interface between the steel and Al. The Al top coat was found to consist of intermetallic phases such as Al_7Cr and Al_3Fe dispersed in an Al matrix. Twinning was observed in both the Al_7Cr and the Al_3Fe phases. Furthermore, the aluminide layer comprised a mixture of nanocrystalline Fe_2Al_5, Al_7Cr, and Al. Details of the microstructural features are presented, and their formation mechanisms are discussed. 展开更多
关键词 hot-dip aluminizing aluminide layer intermetallic phases microstructural features stainless steel
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Corrosion Behavior of Fe-Al-Zn Interphased Dual Phase Steel in Marine Environment
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作者 Itopa Monday Momoh Isaac Enesi Dongo 《Journal of Minerals and Materials Characterization and Engineering》 2019年第2期71-79,共9页
Intercritical heat treatment operation has been in use for the development of Dual Phase Steel (DPS) and has been found to improve the mechanical properties of the steel. In spite of the enhancement a limitation was h... Intercritical heat treatment operation has been in use for the development of Dual Phase Steel (DPS) and has been found to improve the mechanical properties of the steel. In spite of the enhancement a limitation was however observed as to its corrosion susceptibility. In a bid to further enhance the corrosion resistance of the DPS while maintaining its mechanical properties, galvanealing operation was adopted which involving the immersion of the DPS into Al-Zn melt and subsequently subjecting it to annealing operation at 550°C. Weight loss and linear polarization technique were used to measure or evaluate its resistance in 3.5% NaCl (a simulated marine environment). A minimum of 3 samples was used per immersion time. From the result, it was observed that there is a general sharp decrease in the corrosion rate of the GAS as compared to the control sample. The sample immersed and allowed to dwell in the melt for 20 seconds and further annealed with a soaking time of 20 minutes exhibited the highest corrosion resistance. The polarization curve also shows that the substrate was generally passivated, and this is as a result of the Al-Zn/Fe adhesiveness. 展开更多
关键词 TERNARY phase dual phase steel Galvanealed steel Linear Polarization Curve
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Influence of Ni-electrodeposited Pretreatment on Galvanized Coatings of Reactive Steels
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作者 车淳山 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第2期221-224,共4页
Four types of steel sheets containing 0.04%, 0.09%, 0. 14% and 0.36% Si, respectively, were electrodeposited with a nickel layer of 3 tam in thickness and then galvanized in molten Zn at 450℃ for various periods of t... Four types of steel sheets containing 0.04%, 0.09%, 0. 14% and 0.36% Si, respectively, were electrodeposited with a nickel layer of 3 tam in thickness and then galvanized in molten Zn at 450℃ for various periods of time. The formation and growth of intermetallic compound layers on the surface of the samples were investigated by SEM and EDS. The experimental results show that the method of Ni-electrodeposited pretreatment can distinctively restrain the over-growth of the galvanized coatings of reactive steels and get eligible coatings with a proper thickness, bright appearance and strong adherence. EDS results indicate that a series of Ni-Zn intermetallic compounds γ′, γ and δ, are first formed on the surface of the samples. With a prolonged immersion time, the F2-Fe-Zn-Ni and δ-Fe-Zn are formed accompanied by the gradual disappearance of γ′, γ and δ2 layer. After a longer immersion time, the lumpy ζ- Fe-Zn occurs between δ and liquid Zn and the F-Fe-Zn does between steel substrate and δ. Subsequently, ζ is in the form of a continuous and compact layer. The method of Ni-electrodeposited pretreatment changes the formation of Fe-Zn intermetallic compounds, which delay the growth of lumpy (and promote the growth of compact δ. Consequently, the abnormal growth of reactive steels is eliminated. 展开更多
关键词 hot-dip galvanizing electrodepositing Ni reactive steel intermetallic compound
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桥梁缆索用87MnSi钢线材微观组织演变对力学性能的影响
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作者 屈小波 王淼 +7 位作者 曹磊 王鲁义 饶子才 纪文杰 吴彦欣 武晓燕 王天祥 江海涛 《特殊钢》 2024年第3期114-118,共5页
针对桥梁缆索用87MnSi钢线材的异常断裂现象,对其盘条和生产工艺过程中钢丝的微观组织和力学性能演变规律进行系统分析。结果表明,盘条组织由珠光体和少量的先共析铁素体组成,且渗碳体片层随机分布。冷拉拔后,渗碳体片层发生扭转弯曲或... 针对桥梁缆索用87MnSi钢线材的异常断裂现象,对其盘条和生产工艺过程中钢丝的微观组织和力学性能演变规律进行系统分析。结果表明,盘条组织由珠光体和少量的先共析铁素体组成,且渗碳体片层随机分布。冷拉拔后,渗碳体片层发生扭转弯曲或减薄纤维化,且部分渗碳体发生破碎溶解,溶解量为1.40%(占比9.69%)。热镀锌后,溶解的渗碳体发生球化。盘条(329.8HV)在冷拉拔-热镀锌-稳定化处理过程中的显微硬度呈现先增大(450.2HV)后减小(447.9HV)再增大(469.6HV)的变化趋势;冷拉拔过程中溶解的渗碳体使得钢丝硬度值上升至468.3HV,而热镀锌过程渗碳体的球化,导致硬度值下降至439.8HV,并恶化拉伸性能。当边部的渗碳体球化程度明显时,使得钢丝内外组织和力学性能存在较大差异,并在稳定化处理过程中因受力不均匀而导致断裂。 展开更多
关键词 桥梁缆索 87MnSi钢 热镀锌 稳定化处理 断裂 渗碳体球化
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基于聚类和GBDT的镀锌钢卷力学性能预测
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作者 王伟 赵飞 +2 位作者 匡祯辉 白振华 刘勇 《重型机械》 2024年第2期54-58,共5页
热镀锌钢卷力学性能影响因素之间关系复杂,限制了模型精度的提升。采用k-means算法利用化学成分属性对镀锌钢卷数据集进行聚类,将数据聚成三种模式簇实现样本的优选。利用梯度提升树算法,开展各模式数据集与不划分模式的全数据集下的力... 热镀锌钢卷力学性能影响因素之间关系复杂,限制了模型精度的提升。采用k-means算法利用化学成分属性对镀锌钢卷数据集进行聚类,将数据聚成三种模式簇实现样本的优选。利用梯度提升树算法,开展各模式数据集与不划分模式的全数据集下的力学性能建模研究,最后结合网格搜索与交叉验证方法进行模型参数优化。研究结果表明,分模式下模型MAE误差相比于全数据集建模平均减小0.85 MPa。参数优化后,各模式下MAE误差平均减少5.19 MPa,RMSE误差平均减少3.63 MPa,提高了预测模型精度。 展开更多
关键词 热镀锌钢卷 K-MEANS 力学性能建模 梯度提升树 网格搜索法
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770 MPa级调质铸钢液态金属致脆失效原因及相应防护对策
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作者 杨永强 马晓健 +2 位作者 王鹏 刘露芊 郑春雷 《腐蚀与防护》 CAS CSCD 北大核心 2024年第4期54-58,共5页
采用金相显微镜、电子扫描显微镜等对某大型截面铸钢工件裂纹成因进行了分析。结果表明:开裂高强度调质铸钢,在热浸锌过程中,基体产生了垂直于表面的裂纹,裂纹长度约为3 mm,且裂纹沿晶开裂。能谱结果表明,裂纹中富含大量锌,为典型的液... 采用金相显微镜、电子扫描显微镜等对某大型截面铸钢工件裂纹成因进行了分析。结果表明:开裂高强度调质铸钢,在热浸锌过程中,基体产生了垂直于表面的裂纹,裂纹长度约为3 mm,且裂纹沿晶开裂。能谱结果表明,裂纹中富含大量锌,为典型的液态金属致脆现象。针对此情况,在热浸锌工艺、焊接工艺、成型工艺、涂装体系等方面给出了避免产生液态金属致脆的防护对策。 展开更多
关键词 液态金属致脆 调质铸钢 热浸锌 沿晶裂纹
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热镀锌铁合金双相钢表面白条缺陷分析
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作者 陈光 朱敏 茅玮辰 《宝钢技术》 CAS 2024年第1期1-8,15,共9页
分析了热镀锌铁合金双相钢两种白条缺陷的微观形貌及其特征,并对相关工艺进行了讨论。结果表明:两种白条缺陷都源自于镀锌前的基板表面缺陷,一种源自热轧辊系铁皮,其微观以Mo、V、Cr、Ni等热轧辊系元素为特征;另一种推测源自铸坯微裂纹... 分析了热镀锌铁合金双相钢两种白条缺陷的微观形貌及其特征,并对相关工艺进行了讨论。结果表明:两种白条缺陷都源自于镀锌前的基板表面缺陷,一种源自热轧辊系铁皮,其微观以Mo、V、Cr、Ni等热轧辊系元素为特征;另一种推测源自铸坯微裂纹,其微观特征主要为二次氧化物。 展开更多
关键词 热镀锌铁合金 双相钢 白条缺陷 辊系铁皮 二次氧化物
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镀锌钢管环氧粉末涂层附着力的研究
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作者 钟雪泉 杨伟芳 +2 位作者 朱凯 陈凯 吴福辉 《钢管》 CAS 2024年第2期79-84,共6页
简述了钢管热浸镀锌-环氧粉末复合防护涂层体系的特点,详细分析了钢管热镀锌后水冷及钝化、镀锌层表面处理对粉末涂层附着力的影响情况。分析认为,应根据镀锌层风化状态制定热镀锌水冷、钝化及表面处理流程及操作规程,建议采取清扫级喷... 简述了钢管热浸镀锌-环氧粉末复合防护涂层体系的特点,详细分析了钢管热镀锌后水冷及钝化、镀锌层表面处理对粉末涂层附着力的影响情况。分析认为,应根据镀锌层风化状态制定热镀锌水冷、钝化及表面处理流程及操作规程,建议采取清扫级喷砂清理清洁锌层表面,以获取合适的表面粗糙轮廓,改善粉末涂层附着力。 展开更多
关键词 热镀锌钢管 复合涂层体系 表面处理 热浸镀锌 附着力
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基于Gissmo失效准则的DP590双相钢和热成形钢的断裂特性研究
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作者 朱建琳 王超超 王秋月 《塑性工程学报》 CAS CSCD 北大核心 2024年第2期163-172,共10页
首先对车身上常用的DP590双相钢和热成形钢进行了6种不同应力三轴度下的试验研究,获取了材料的基本力学特性。使用Ludwike硬化模型获取了材料颈缩后的真实塑性应力-真实塑性应变曲线,并通过对比颈缩较小的纯剪切工况仿真模拟结果与试验... 首先对车身上常用的DP590双相钢和热成形钢进行了6种不同应力三轴度下的试验研究,获取了材料的基本力学特性。使用Ludwike硬化模型获取了材料颈缩后的真实塑性应力-真实塑性应变曲线,并通过对比颈缩较小的纯剪切工况仿真模拟结果与试验结果验证了外插曲线的正确性。通过仿真逆向优化的方式,使用LS-OPT软件获取了可以描述材料非线性损伤的Gissmo失效模型参数。为快速准确地获取模型参数,提出了一种获取待优化参数初始值并采用不同应力三轴度区间开展模型系数优化的方法。最后,开展了未参与优化的60°拉剪和R 6缺口工况的仿真模拟,仿真结果与试验结果一致,从而验证了模型参数的正确性。 展开更多
关键词 DP590双相钢 热成形钢 断裂模型 Gissmo
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热镀锌双相钢HC420/780DPD+Z电阻点焊工艺与性能研究
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作者 王亚芬 张杰 陈虹宇 《电焊机》 2024年第5期124-129,共6页
为获得1.5 mm厚的汽车用热镀锌双相钢HC420/780DPD+Z的电阻点焊工艺窗口,采用中频逆变式电阻点焊机对其进行点焊试验,通过电极压力等参数调整,获得由不同焊接时间、焊接电流等组成的焊接工艺窗口。并通过显微硬度测试、剪切拉伸、十字... 为获得1.5 mm厚的汽车用热镀锌双相钢HC420/780DPD+Z的电阻点焊工艺窗口,采用中频逆变式电阻点焊机对其进行点焊试验,通过电极压力等参数调整,获得由不同焊接时间、焊接电流等组成的焊接工艺窗口。并通过显微硬度测试、剪切拉伸、十字拉伸试验以及金相检测等方法,对点焊接头性能进行综合评价。研究结果表明,在焊接时间为410~430 ms时,焊接电流工艺窗口为3.4~3.6 kA,可获得无缩孔、裂纹的焊接接头;接头的平均抗剪力为14.88 kN,平均十字拉伸力为7.1 kN;熔核区的显微硬度为402~455 HV,热影响区硬度为237 HV,未见脆化现象;电极寿命大于500个焊点,均满足GWS-5A标准要求。在此工艺下,接头的力学性能优异,显微组织主要为马氏体,硬度分布规律表明熔核区硬度最高。此外,焊接接头的失效模式主要为界面断裂和纽扣型熔核断裂,其中纽扣型熔核断裂具有更高的承载能力和能量吸收能力。 展开更多
关键词 热镀锌双相钢 电阻点焊 焊接工艺窗口 力学性能 断裂模式
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热渗锌工艺对钢制螺栓力学性能的影响研究
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作者 王媛媛 朱培 +3 位作者 王小龙 何卫平 刘元海 郭晓旭 《环境技术》 2024年第1期34-41,共8页
为了研究热渗锌工艺对钢制螺栓的力学性能影响。通过硬度检测、拧脱耐磨试验、拉伸强度检测及微观分析等测试技术,分析评价了钢制螺栓表面热渗锌层的力学性能。结果显示,经热渗锌工艺处理后,钢制材料的组织结构及化学成分并没有改变,且... 为了研究热渗锌工艺对钢制螺栓的力学性能影响。通过硬度检测、拧脱耐磨试验、拉伸强度检测及微观分析等测试技术,分析评价了钢制螺栓表面热渗锌层的力学性能。结果显示,经热渗锌工艺处理后,钢制材料的组织结构及化学成分并没有改变,且经过处理后的螺栓抗拉强度均符合标准规定,表明热渗锌工艺对螺栓力学强度影响较小,但热渗锌工艺能够显著提升钢制螺栓的拧脱耐磨性能及显微硬度,这为钢制螺栓大规模使用热渗锌工艺提供了一种解决方案。 展开更多
关键词 钢制螺栓 热渗锌 力学性能 断口失效分析
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1960 MPa级Ф15.20 mm高强度低松弛预应力镀锌钢绞线研制
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作者 周鑫 张青 +1 位作者 李权大 吴光虎 《金属制品》 CAS 2024年第1期12-14,共3页
介绍1 960 MPa级Ф15.20 mm低松弛预应力镀锌钢绞线研发工艺。采用的Ф13.0 mm 82B专用盘条添加Cr和V元素,采用盐酸酸洗和锌系磷化表面处理工艺,中频加热温度380℃,张力120 kN,捻制速度40 m/min,生产的镀锌钢绞线力学性能和表面质量均符... 介绍1 960 MPa级Ф15.20 mm低松弛预应力镀锌钢绞线研发工艺。采用的Ф13.0 mm 82B专用盘条添加Cr和V元素,采用盐酸酸洗和锌系磷化表面处理工艺,中频加热温度380℃,张力120 kN,捻制速度40 m/min,生产的镀锌钢绞线力学性能和表面质量均符合GB/T 33363—2016要求,满足客户对产品的技术使用要求。 展开更多
关键词 钢绞线 热镀锌 表面处理 抗拉强度
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冷轧厂薄带钢高效生产的问题及解决方案分析
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作者 王永恒 《山西冶金》 CAS 2024年第1期237-238,241,共3页
热镀锌板具有抗腐蚀强、易于深加工、使用寿命长、成本低以及表面美观等特点,主要用于家用电器、汽车等产品的内部构件和面板应用。随着家电板、汽车板工业的发展,家电和汽车所用的镀锌板占全国钢产量的比例逐步提升。随着国内外家电板... 热镀锌板具有抗腐蚀强、易于深加工、使用寿命长、成本低以及表面美观等特点,主要用于家用电器、汽车等产品的内部构件和面板应用。随着家电板、汽车板工业的发展,家电和汽车所用的镀锌板占全国钢产量的比例逐步提升。随着国内外家电板、汽车板轻质化和高质量的要求,客户对产品表面质量要求越来越严格。针对生产线在提速增产过程中出现的入口跑偏、工艺段带钢表面质量缺陷和薄带钢薄锌层产速受限问题,提出了相应的改进措施。优化后,不仅提高了产量,而且提高了产品质量。 展开更多
关键词 热镀锌板 冷轧厂 薄带钢 跑偏 工艺段 表面质量缺陷
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热镀锌钢管表面黑斑形成机理分析
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作者 陈扬 《新疆钢铁》 2024年第2期58-60,共3页
热镀锌钢管在制造过程中,其表面有时会出现黑斑缺陷,这一问题长期以来一直困扰着生产厂和用户。黑斑不仅影响产品的外观质量,还可对产品的耐蚀性和加工性能造成不良影响。为了解决这一问题,本文分析了热镀锌钢管表面黑斑的形成机理,确... 热镀锌钢管在制造过程中,其表面有时会出现黑斑缺陷,这一问题长期以来一直困扰着生产厂和用户。黑斑不仅影响产品的外观质量,还可对产品的耐蚀性和加工性能造成不良影响。为了解决这一问题,本文分析了热镀锌钢管表面黑斑的形成机理,确定了黑斑形成的主要原因。在此基础上,本文提出了相应的预防和控制措施,旨在为热镀锌管的质量控制提供参考。 展开更多
关键词 热镀锌钢管 黑斑 形成机理
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新型无铬钝化剂处理热浸镀锌钢的耐腐蚀性能研究
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作者 陶俊 汪志刚 +1 位作者 蔡伟豪 肖进荣 《江西冶金》 2024年第3期193-198,共6页
为研究新型无铬钝化剂对热浸镀锌钢的钝化效果,以有机硅改性丙烯酸树脂、水性复合有机聚硅氧烷、改性纳米二氧化硅为主要成分,制备无铬钝化剂。利用扫描电子显微镜、X射线能谱仪表征钝化膜的表面形貌和元素组成。同时,通过电化学工作站... 为研究新型无铬钝化剂对热浸镀锌钢的钝化效果,以有机硅改性丙烯酸树脂、水性复合有机聚硅氧烷、改性纳米二氧化硅为主要成分,制备无铬钝化剂。利用扫描电子显微镜、X射线能谱仪表征钝化膜的表面形貌和元素组成。同时,通过电化学工作站测量不同钝化时间试样的Tafel极化曲线和阻抗,评估新型无铬钝化剂的钝化效果。结果表明,经新型无铬钝化剂钝化的镀锌钢的耐腐蚀性能显著提升。钝化前,镀锌钢试样的拟合阻抗值为1104.8Ω‧cm^(2);钝化120 s后,试样的阻抗值为6697.3Ω‧cm^(2)。钝化360 s后,在钝化过程中形成较多的颗粒相,导致钝化膜破碎,耐腐蚀性能降低。 展开更多
关键词 热浸镀锌钢 无铬钝化 电化学阻抗 极化曲线
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Effect of Strengthening Phase on Deformation Behaviour during Uniaxial Tension of Hot-rolled Dual Phase Steel 被引量:3
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作者 Le-yu ZHOU Bo JIANG +3 位作者 Tian-hao CUI Dan ZHANG Jian-zhong HE Ya-zheng LIU 《Journal of Iron and Steel Research(International)》 SCIE EI CAS CSCD 2014年第12期1111-1115,共5页
Two kinds of C-Si-Mn-Cr series tested steels were designed to obtain dual phase microstructures of ferrite (F) +martcnsite (M) or ferrite (F)-bainite (B) with different mechanical properties. Effects of stren... Two kinds of C-Si-Mn-Cr series tested steels were designed to obtain dual phase microstructures of ferrite (F) +martcnsite (M) or ferrite (F)-bainite (B) with different mechanical properties. Effects of strengthening phase on yielding and fracture behaviours during uniaxial tension of dual phase steel were discussed. Compared with hot-rolled martensite dual phase steel, ferrite-bainite dual phase steel has high ratio of yield strength to tensile strength (YS/TS) and low elongation. During necking process of uniaxial tension, microvoids of ferrite-martensite steel are generated by fracture of ferrite/martensite boundary or martensite islands with irregular shape. But ferrite matrix elongated remarkably along deformation direction, and strengthening phase also coordinated with ferrite matrix. Compatible de formation between ferrite and bainite is distinct. Ferrite-bainite dual phase steel has fine and less microvoid, and phase boundary of ferrite and bainite is beneficial for restraining generation and extending of microvoid. 展开更多
关键词 hot-rolled dual phase steel strengthening phase YIELDING NECKING microvoid
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