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致反应激烈, 造成钢液喷溅. 本研究中镁含量选取5%~20%为考察区间, 炼制的镁铝合金成分如表3所列. 表3 镁铝合金的化学成分 Table 3 Chemical composition of Al-Mg alloy (mass fraction, %) 考虑到镁在炼制过程中的损耗, 镁的配入量略大. 镁铝合金包芯线制作步骤如下: 1) 将纯镁和...6h, 随炉冷却, 进行退火处理. 2 结果与讨论 2.1 镁铝合金处理对全氧的影响 对每炉实验的样品1#和样品2#作全氧分析, 结果如图1所示. 图1 镁铝合金处理后全氧含量的变化 Fig.1 Variety of total oxygen content after Al-Mg alloy treatment......
) 0.1; (c) 1; (d) 5; (e) 10 T/K: 1-423; 2-473; 3-523; 4-573; 5-623; 6-673; 7-723 图1 AZ31镁合金不同应变速率的真应力-真应变曲线 Fig.1 True stress-strain curves of cast AZ31 magnesium alloy at different... AZ31镁合金热压缩流变应力和应变速率的相关性 Fig.2 Relativity of stress and strain rate for AZ31 magnesium alloy 由式(3)可得到: 其中:；.将实验数据代入式(4)可绘出ln[sinh(ασ)]-1 000/T关系曲线,如图3所示.可见,ln[sinh(ασ)]与1 000/T两者呈线性关系,证明......
Trans. Nonferrous Met. Soc. China 23(2013) 756-764 Hot deformation behavior and processing maps of Mg-Zn-Cu-Zr magnesium alloy Hui YU1,2, Hua-shun YU1, Young-min KIM2, Bong-sun YOU2, Guang-hui MIN1 1... Mg-6Zn-1.5Cu-0.5Zr alloy. Key words: Mg alloy; Cu addition; flow stress; deformation behavior; constitutive equation; artificial neural network; processing map 1 Introduction As the lightest metallic......
Al,Mg添加剂对方镁石-尖晶石-碳砖性能的影响 杨丁熬1,韩莉红1 (1.三门峡职业技术学院,) 摘要:采用烧结镁铝尖晶石,电熔镁砂和鳞片石墨为主要原料,研究了方镁石-尖晶石-碳砖中添加的金属Al,Mg和不同Mg/Al比对其碳化后残存膨胀率,热膨胀率和N2中1500℃,1.5 h处理后的失重率的影响.结果表明:添加适量Al,Mg组分及控制适当的Mg/Al质量比可明显提高其性能. 关键词:Al,Mg添加剂,方镁石-尖晶石-碳砖; [全文内容正在添加中] ......
, AZ91镁合金的耐磨性要远远高于AM60稀土镁合金. 磨损机制在实验条件下都相同, 均发生由轻微磨损向严重磨损的转变; 稀土的加入细化合金组织, 改善镁合金的综合性能, 增强磨损表面氧化膜的稳定性, 提高稀土镁合金的承载能力, 有效地延迟由轻微磨损向严重磨损的转变过程. 关键词: AZ91; AM60; 稀土; Mg-Al合金; 摩擦磨损 中图分类号: TG136 ...织由α-Mg基体和沿晶界不规则分布的β相(Mg17Al12)组成(图1(a, c)). 在AM60中由于铝含量低, β相也大大减少. 加入稀土后, 析出了棒状或针状金属间相--Al11RE3相[12], 而β相相对减少, 这一点对于AM60合金尤为明显(图1(b, d)). 2.2 稀土镁合金的拉伸性能与硬度 图2与图3所示为镁合金的拉伸性能与硬度曲线. 从图中可看出, 随稀土含量的......
: AZ91D magnesium alloy; solid-state recycling; hot extrusion; mechanical properties 镁合金作为轻质结构材料由于具有密度小, 比强度和比刚度高, 导热和导电性能好, 切削加工性能好, 优良的阻尼性和电磁屏蔽性等优点, 在航空航天, 汽车, 电子, 通讯等方面获得了广泛的应用. 尽管如此, 由...变形主要通过{0001}<112[TX-]0>滑移系进行, 而在锥面{101[TX-]2}<101[TX-]1>滑移系只发生适量的压缩孪生变形. α-Mg 相只有3个几何滑移系和2个独立的滑移系, 不能提供协调任意方式形变所需的5 个独立滑移系. 研究表明[13], 在温度高于473K时, 镁及其合金第Ⅰ类角锥面{1011}上的滑移系可以开动, 498K以上第Ⅱ类角锥面{1012}上的滑移系也可以......
. The conversion film is mainly composed of Mg, Al12Mg17 and MgSnO3?3H2O, and the fine sphericity grain forms on the surface. The film can provide a good protection for the magnesium alloy. Key words: magnesium alloy; stannate; chemical conversion film; corrosion resistance 镁合......
for the alloys. The density changes during the solid-liquid phase transition were directly measured for Mg and the Mg70Li30 alloy. The temperature dependences and reference tables of the investigated... liquidus temperatures TL were equal to (921.5±1.0) K for Mg, (865.2±1.5) K for Mg77Li23, and (867.9±1.5) K for Mg70Li30. Scanning of the solid sample of the Mg70Li30 alloy showed its......
appear on each residual short wire. As the immersion time is prolonged, the residual magnesium alloy wires continue to corrode and break into smaller pieces. Our data show that the untreated Mg alloy... and HA phases. After immersion in SBF, the Mg(OH)2 phase emerges as the degradation product. In SBF, the untreated AZ31B magnesium alloy wires exhibit a fast degradation rate but MAO can effectively......
镁合金晶粒方法[J]. 特种铸造及有色合金, 2002, 22(4): 18-19. ZHANG Shi-jun, LI Wen-xian, YU Kun. A method of adding carbon containing flux for refining Mg alloy grain[J]. Special Casting & Nonferrous Alloys, 2002, 22(4): 18-19. [8]董选普, 樊自田, 黄乃瑜, 等. 镁合金消失模铸造的优势及关键[J]. 特种铸造及有色合金, 2003, 23(4): 30-32. DONG Xuan-pu, FAN Zi-tian, HUANG Nai-yu, et al. Key issues and advantages of Mg alloy in lost foam casting[J......
