【摘 要】
：
The hydrogen permeation behaviour of DP and Q&P grades of advanced high strength steels was investigated using the permeability experiments(1)under cathodic charging at different potentials in 0.1 M N
【机 构】
：
The University of Queensland,Division of Materials,School of Mining and Mechanical Engineering,St. L
【出 处】
：
第十届中国钢铁年会暨第六届宝钢学术年会
论文部分内容阅读
The hydrogen permeation behaviour of DP and Q&P grades of advanced high strength steels was investigated using the permeability experiments(1)under cathodic charging at different potentials in 0.1 M NaOH solution,(2)in 3%NaCl solution at the free potential simulating the corrosion behaviour of non-galvanized steel in service and(3)at zinc potential for the corrosion condition of the galvanized steel during actual service.Under cathodic charging at different potentials in 0.1 M NaOH solution,hydrogen permeation decreased with less negative charging potential,reflected by lower values of permeation rate and diffusion coefficient.At the most severe charging condition of –1.700 VHg/HgO in the 0.1 M NaOH solution,the permeation rate for 1200 DP-GI steel was 1.53 μA/cm and for 980 QP steel was 0.492 μA/cm.The values for 1200 DP-GI and 980 QP steels at the least severe charging condition of –1.100 VHg/HgO were 0.178 μA/cm and 0.111 μA/cm,respectively.The hydrogen permeation rate under simulated service conditions in 3%NaCl solution was significantly lower than the value under the least negative cathodic charging potential of –1.100 VHg/HgO in NaOH solution.The Zn coating on the 1200 DP-GI steel could protect the substrate steel from corrosion,however,once the Zn coating was corroded under actual service,more hydrogen would be introduced into and permeate through the steel.
其他文献
采用拉-拉疲劳试验研究了连续热镀锌780MPa级冷轧双相钢的高周疲劳性能,绘制了其疲劳寿命-应力幅曲线,并采用扫描电镜对其疲劳断口和样品表面进行了观察,分析了其在高周疲劳情况下的疲劳断裂行为,同时采用透射电镜对其断裂后的断口附近微观结构进行了观察.结果表明,连续热镀锌冷轧双相钢DP780在应力比R为0.1,加载频率为15Hz的条件下的疲劳极限为250MPa;通过对疲劳断口和样品表面的观察发现疲劳裂
Effect of strain aging on the tensile property of an X100 pipeline steel with different microstructures was investigated by optical microscope,scanning electron microscope,and so on.It is found that t
针对某钢厂120t底吹氩钢包建立了相似比为1:3的物理模型,研究了双孔等流量吹氩时的不同吹氩孔布置和吹氩流量对钢包混匀效果的影响,对比探究了双孔一强一弱(流量不等)的吹氩模式下的混匀效果;同时,综合钢渣模拟试验,得出了适合该钢包的吹氩制度.实验结果表明:双孔相同吹氩流量下,较好的吹氩口布置为0.7R处,夹角180°,吹气流量300～400L/min;双孔一强一弱吹氩模式下,吹氩口布置在0.64R处
This paper presents a new method for characterizing the interface stresses between an elastic rough ball and a smooth rigid plate under lubrication.Both micro asperity deformation and macro elastic de
总结了近年来宝钢股份高炉历史休风减矿基本情况及特点,提出简洁、高效的“一次方程式”休风减矿标准公式对原来休风减矿标准作了优化和改进,分析、对比了采用新的减矿标准前后在送风恢复时间、炉温水平等方面的成效,得出结论:宝钢在大高炉休风减矿方面积累了成功的技术和经验,休风减矿标准不断改进、完善,为高炉顺利休风、复风奠定了坚实的技术基础.高炉休风减矿的核心关键在于:根据休风时间、基础矿焦比、炉况状态、休风工
对重钢一炼钢厂1号板坯连铸机各类漏钢事故的分析,发现黏结漏钢是主要因素.进一步分析发现结晶器液面波动大、SEN潜入深度不合适、生产条件保障不到位及保护渣性能波动等容易造成黏结漏钢的发生,在对1号连铸机发生的漏钢事故进行分析基础上，一炼钢厂进行了防漏钢攻关，提高设备精细化管理水平、制定操作及工艺规范化措施，依靠漏钢预报自动报警以及人工监护，大大减小了漏钢几率。
研究了CSP流程生产的无取向电工钢50W800组织、织构及夹杂物特点,结果表明:(1)成品板为再结晶组织,晶粒尺寸为43.68μm;(2)成品织构以{111}面织构为主,{111}含量达到35.8％;(3)成品板夹杂物以氧化物和硫化物的复合夹杂为主.
利用金相显微镜、TEM等方法分析了不同保温温度和冷却速度对C-Si-Mn-Nb系高强冷轧板显微组织、力学性能和第二相粒子析出行为的影响.结果表明:50℃/s冷速下,保温温度低于800℃时出现带状马氏体,强度高,延伸率较低,超过840℃时铁素体体积分数显著下降,并出现M-A和残奥组织,在820℃时,马氏体组织弥散分布在铁素体基体上,观察到尺寸在7～9nm之间的Nb(C,N)析出物,其综合力学性能最佳
本文对俄罗斯高硅管线钢K52的成分、性能及组织进行了研究,并将其与API X56管线钢进行了对比研究.研究结果表明,K52在成分上采用高硅低锰的成分体系,在强度上与API X56管线钢相近.但K52对塑形和韧性要求更高,要求屈强比≤0.86,-20℃V型冲击功和-60℃的U型冲击功.对于俄罗斯高硅管线钢K52,由于其高硅低锰的成分体系,热轧过程中其氧化铁皮较为严重,较低的出炉温度可以减少氧化铁皮厚
Martensitic advanced high strength steel(MS-AHSS)belongs to a new class of steels that are currently used in the manufacture of lightweight yet crashworthy cars.One issue with using high-strength stee