期刊文献+

二次检索

题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到456篇文章
< 1 2 23 >
每页显示 20 50 100
Effect of hot-dip galvanizing processes on the microstructure and mechanical properties of 600-MPa hot-dip galvanized dual-phase steel 被引量:4
1
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
下载PDF
Effect of Hot Dip Galvanized Steel Surface Chemistry and Morphology on Titanium Hexafluoride Pretreatment
2
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
下载PDF
Evolution of appearance profile of hot-dip galvanized car-body steel sheet during deformation process
3
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
下载PDF
Influence of Ni-electrodeposited Pretreatment on Galvanized Coatings of Reactive Steels
4
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
下载PDF
The development of surface treatment products and technologies of steel sheets in Baosteel
5
作者 ZHENG Jianping Manufacturing Management Department,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China 《Baosteel Technical Research》 CAS 2010年第S1期50-,共1页
The surface treatment technology can improve the corrosion resistance of steel sheets and increase the value of steel application.The surface treated steel sheets in Baosteel include zinc galvanized steel sheets,sin g... The surface treatment technology can improve the corrosion resistance of steel sheets and increase the value of steel application.The surface treated steel sheets in Baosteel include zinc galvanized steel sheets,sin galvanized steel sheets,chromium galvanized steel sheets,and colour coating steel sheets with the application in the area from construction to automobiles,appliance,package,etc.The development,application and manufacturing technique of these products have become the core competition power of Baosteel. The article reviews the developments of surface treated steel sheets and surface treatment technologies in Baosteel in 10 years,especially hot dip galvanized high strength steel products used in vehicles.The article also looks forward into further developments of surface treatment steel products and technologies in Baosteel,which will focus on:①the new products of hot dip galvanized advanced high strength steels;②more environmental friendly products or functional coating products;③the development of surface treatment technologies to meet the requirement of higher surface quality in the marcket;④new type of surface treatment and coating technologies. 展开更多
关键词 surface treatment hot dip galvanized high strength steel
下载PDF
On-line control of surface quality for an axially moving steel strip partially immersed in fluid under tension
6
作者 LI Qingsheng WANG Lu ZHU Wei 《Baosteel Technical Research》 CAS 2015年第3期1-7,共7页
An on-line control method of surface quality for continuous hot-dip galvanized steel strip after cooling is presented, which combines analytical dynamics theory of a thin plate with the finite element method. The inhe... An on-line control method of surface quality for continuous hot-dip galvanized steel strip after cooling is presented, which combines analytical dynamics theory of a thin plate with the finite element method. The inherent characteristics of the non-immersed and partially immersed strip in liquid zinc were calculated on the basis of theoretical analysis and numerical simulation, respectively. Multi-parameter fitting of the deviation between results using different methods was performed. To optimize the strip excitation frequency away from the resonance region, on-line vibration control of the strip near the air knife under full product conditions was achieved by changing the field production parameters based on the field test results. The results indicate that although the axial velocity has little effect on the inherent characteristics of the strip compared with other manufacturing parameters such as the steel specifications and tension, it induces external excitations,including moving the aerodynamic load and bearing vibration. To some degree, the vibration near the air knife can be reduced by strengthening the support stiffness of the contact rolls. A total on-line control program of surface quality for continuous hot-dip galvanized pure Zn and galvannealed steel sheet in the cooling section is proposed. 展开更多
关键词 continuous hot-dip galvanizing steel strip GI GA aerodynamic load
下载PDF
桥梁缆索用87MnSi钢线材微观组织演变对力学性能的影响
7
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
下载PDF
热轧工艺对家电用热镀锌超深冲IF钢性能影响的研究
8
作者 刘妍 屈文胜 +1 位作者 宋文钟 王亚男 《包钢科技》 2024年第5期36-40,72,共6页
文章结合生产实践,研究了热轧关键工艺参数对家电用热镀锌超深冲IF钢性能的影响,分别开展了880℃和915℃两种精轧终轧温度、680℃和710℃两种卷取温度下试验钢的织构、金相组织及力学性能分析。研究结果揭示了不同热轧工艺参数与家电用... 文章结合生产实践,研究了热轧关键工艺参数对家电用热镀锌超深冲IF钢性能的影响,分别开展了880℃和915℃两种精轧终轧温度、680℃和710℃两种卷取温度下试验钢的织构、金相组织及力学性能分析。研究结果揭示了不同热轧工艺参数与家电用热镀锌超深冲IF钢成品织构、金相组织及力学性能的相关性,为通过制定合理的热轧工艺来提高热镀锌超深冲IF钢产品性能提供了参考。 展开更多
关键词 热镀锌超深冲IF钢 织构 精轧终轧温度 卷取温度 金相组织
下载PDF
基于聚类和GBDT的镀锌钢卷力学性能预测
9
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
下载PDF
770 MPa级调质铸钢液态金属致脆失效原因及相应防护对策
10
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
下载PDF
双相钢热镀锌前热处理工艺研究
11
作者 李萍 金鑫 +3 位作者 高艳红 王君玲 席晓燕 苑少强 《唐山学院学报》 2024年第6期14-19,26,共7页
对DP600钢进行热镀锌前的热处理工艺研究,探讨不同再加热工艺条件下DP600钢的组织和力学性能。通过扫描电子显微镜和透射电子显微镜观察,分析快速冷却温度、再加热过程保温时间对组织演变的影响。拉伸试验表明,不同的微观结构组成表现... 对DP600钢进行热镀锌前的热处理工艺研究,探讨不同再加热工艺条件下DP600钢的组织和力学性能。通过扫描电子显微镜和透射电子显微镜观察,分析快速冷却温度、再加热过程保温时间对组织演变的影响。拉伸试验表明,不同的微观结构组成表现出不同的力学性能和加工硬化行为,随着快速冷却温度从250℃降低到150℃,粒状残余奥氏体晶粒的体积分数增加,抗拉强度从658 MPa降低到643 MPa;快速冷却温度为200℃时,随着保温时间的增加,屈服强度(YS)、拉伸强度(TS)和屈服强度与拉伸强度的比值(YS/TS)均呈下降趋势。此外,在两阶段的加工硬化行为中,保温时间为10 s的样品与30 s和50 s样品相比,在阶段Ⅰ和阶段Ⅱ皆略高,这归因于未转化奥氏体在较短保温时间内稳定性较低,在随后的冷却过程中已转化为马氏体。 展开更多
关键词 热处理 微观结构 力学性能 热镀锌 双相钢 加工硬化
下载PDF
镀锌钢管环氧粉末涂层附着力的研究
12
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
下载PDF
Q235钢和热镀锌钢在棕壤土环境中的腐蚀行为研究
13
作者 姚鑫 陈昊 +5 位作者 周学杰 王靖羽 余建飞 张明 吴军 陈志坚 《材料保护》 CAS CSCD 2024年第10期59-67,125,共10页
为研究接地网设备常用金属材料Q235钢和热镀锌钢在棕壤土环境中的初期土壤腐蚀行为,在湖北襄阳地区选取东津、乔营站内外共4个土壤腐蚀实验点进行实验,采用宏观形貌分析、微观形貌分析、腐蚀产物分析和电化学测试等手段进行试样分析。... 为研究接地网设备常用金属材料Q235钢和热镀锌钢在棕壤土环境中的初期土壤腐蚀行为,在湖北襄阳地区选取东津、乔营站内外共4个土壤腐蚀实验点进行实验,采用宏观形貌分析、微观形貌分析、腐蚀产物分析和电化学测试等手段进行试样分析。形貌分析结果表明,襄阳土壤环境中碳钢试样腐蚀1 a后表面为非均匀腐蚀,可见明显的麻坑状腐蚀坑,镀锌钢材料未见明显红锈且表面镀锌层未被破坏。腐蚀产物分析表明,襄阳地区棕壤土为高含水率的碱性土壤,Q235钢土壤埋地试样1 a后表面锈层的主要成分铁氧化物和微量的SiO_(2),镀锌钢表面腐蚀产物主要为锌氧化物和微量SiO_(2)。腐蚀速率与土壤理化性质相关性分析结果表明,在襄阳土壤环境中,2种试样土壤腐蚀速率与土壤理化性质均呈正相关,其中土壤pH值对土壤腐蚀速率影响最为显著。电化学结果表明,镀锌钢表面镀锌层为基材提供良好的保护性,镀锌钢的腐蚀电流密度较Q235钢小1~2个数量级。综上,在襄阳地区棕壤土环境中镀锌钢材料较Q235钢材料表现出更为优异的耐蚀性,值得注意的是,该地区土壤pH值显著影响镀锌钢材料的土壤腐蚀速率。 展开更多
关键词 Q235钢 热镀锌钢 腐蚀产物 土壤腐蚀 电化学测试
下载PDF
热渗锌工艺对钢制螺栓力学性能的影响研究
14
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
下载PDF
热镀锌汽车钢表面气刀飞溅缺陷分析与控制
15
作者 孙旭东 郭强 彭彪 《鞍钢技术》 CAS 2024年第5期26-32,共7页
针对热镀锌汽车板表面亮点和白点缺陷,利用扫描电镜(SEM)对其组织成分和微观形貌进行分析。分析结果表明,上述缺陷是锌颗粒和锌皮子缺陷,均为气刀飞溅导致。采取稳定控制生产线速度,优化气刀压力、高度及角度等工艺参数,严格管理气刀的... 针对热镀锌汽车板表面亮点和白点缺陷,利用扫描电镜(SEM)对其组织成分和微观形貌进行分析。分析结果表明,上述缺陷是锌颗粒和锌皮子缺陷,均为气刀飞溅导致。采取稳定控制生产线速度,优化气刀压力、高度及角度等工艺参数,严格管理气刀的维护与检查等措施后,气刀飞溅引起的带钢锌颗粒缺陷降级率由0.23%降至0.11%,锌皮子缺陷降级率由0.11%降至0.06%,满足了用户对汽车钢板表面质量的要求。 展开更多
关键词 热镀锌 汽车钢 气刀飞溅 气刀压力 气刀角度 气刀高度
下载PDF
热镀锌双相钢HC420/780DPD+Z电阻点焊工艺与性能研究
16
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
下载PDF
热镀锌钢板烘烤硬化值检测的影响因素
17
作者 罗健 高兴健 +1 位作者 李勇 杨继武 《理化检验(物理分册)》 CAS 2024年第8期6-9,共4页
为了研究热镀锌钢板烘烤硬化值检测的影响因素,主要介绍了HC180BD+Z钢板烘烤硬化值的检测方法与检测结果,分析并探讨了试验温度、保温时间、加热装置、拉伸预应变等烘烤条件对烘烤硬化值检测的影响因素。结果表明:采用相同加热装置时,... 为了研究热镀锌钢板烘烤硬化值检测的影响因素,主要介绍了HC180BD+Z钢板烘烤硬化值的检测方法与检测结果,分析并探讨了试验温度、保温时间、加热装置、拉伸预应变等烘烤条件对烘烤硬化值检测的影响因素。结果表明:采用相同加热装置时,将保温时间控制为20 min,试验温度由160℃上升至180℃,烘烤硬化值一直保持上升趋势,但当试验温度为160~170℃时,烘烤硬化值的上升趋势要比试验温度为170~180℃的变化明显;采用相同加热装置时,控制试验温度为170℃,当保温时间由16 min延长至20 min时,烘烤硬化值随保温时间的延长而上升,但当保温时间由20 min延长至30 min时,烘烤硬化值无明显变化;采用相同的试验温度和保温时间,不同的加热装置时,烘烤硬化值的检测结果无明显差异;当拉伸预应变由1%增大至2%时,烘烤硬化值的变化趋势与拉伸预应变同步,均有上升趋势,当拉伸预应变由2%增大至3%时,烘烤硬化值却随着拉伸预应变的增大呈下降趋势。 展开更多
关键词 热镀锌钢板 烘烤硬化值 试验温度 保温时间 加热装置 拉伸预应变
下载PDF
1960 MPa级Ф15.20 mm高强度低松弛预应力镀锌钢绞线研制
18
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
下载PDF
冷轧厂薄带钢高效生产的问题及解决方案分析
19
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
下载PDF
基于造价视角的建筑电气设计思考
20
作者 崔浩 胡冰 毛佩佩 《建筑电气》 2024年第S01期24-28,共5页
统计、分析各类型建筑中电气单方造价及占建安总费用的比例,从宏观上了解电气造价;比较高压电缆不同敷设方式的单位造价,总结合理布局电气设备用房的重要性;比较不同材质的管材在不同敷设方式下的造价,比较不同防腐材质桥架的价格,总结... 统计、分析各类型建筑中电气单方造价及占建安总费用的比例,从宏观上了解电气造价;比较高压电缆不同敷设方式的单位造价,总结合理布局电气设备用房的重要性;比较不同材质的管材在不同敷设方式下的造价,比较不同防腐材质桥架的价格,总结材料选择对造价的影响;比较不同规格非消防负荷电缆、不同危险类灯具的造价,分析过度设计对造价的影响。 展开更多
关键词 电气总造价 电气单方造价 占建安费比例 造价指标 SC管(热浸镀锌厚壁焊接钢管) 热浸镀锌桥架 非消防负荷线缆 过度设计
下载PDF
上一页 1 2 23 下一页 到第
使用帮助 返回顶部