In low temperature homogeneous annealing, microstructure of multi-aluminum bronze are same to it's as-cast, and the alloy still possesses high strength, high hardness, but toughness has evidently declined trend. 低温均匀化退火态的组织仍为β′、α、γ2、K,该铝青铜低温退火下仍表现为强度、硬度高,冲击韧性有明显下降的趋势。
Different from the surface enrichment in Cu or the formation of homogeneous alloy generally observed on Ni-Cu catalysts, the surface of the above-mentioned catalysts was enriched in Ni. 与通常观察到的Ni-Cu催化剂中Cu在表面富集或生成均相合金不同,这些催化剂是表面Ni富集。
Homogeneous Solidification of Cu-40wt% Pb Hypermonotectic Alloy 过偏晶Cu-40wt%Pb合金的均质化凝固
Transverse static homogeneous magnetic field can effectively reduced or eliminate gravity driven and thermal convection during directional solidification of Al Bi monotectic alloy. 横向均匀静态磁场可以有效地抑制定向凝固过程中熔体中的对流;
Cr is more homogeneous in the high alloy layer and it diffuses in the interface region. Cr在界面区有一定程度的扩散,Cr在高合金层中的分布相对均匀。
Graphite smelting and solidifying in arc furnace is in globular shape, and homogeneous globular graphite is achieved in rapidly-solidified alloy prepared by 3m drop tube. 在电弧炉中熔炼并凝固,石墨基本呈球状组织形态,在3m落管中经深过冷快速凝固后石墨呈球状组织。
Preparation of Homogeneous Hypermonotectic Alloy by High Undercooling Technique and Research on Formation Mechanism 深过冷技术制备均质过偏晶合金及其形成机制的研究
The pre-precipitate phase helps to form a homogeneous structure which improves the alloy properties. 合金中预析出的部分微晶相有助于在随后的晶化退火处理中获得均匀的微观组织,详细研究了晶化退火温度对合金微观组织结构及磁性能的影响。
Results have shown that the densified monophase solid solution ( 0.2%~ 0.3% oxygen content) with homogeneous composition could be made by mixing Nb-Al intermidiate alloy powder and Ti powder that followed by compacting and sintering in vacuum at 1700 ℃ for 4h. 结果表明:采用Nb-Al中间合金粉和Ti粉,经混合、压制成形后,于1700℃真空烧结,保温4h,可制得致密且成分均匀的单相固溶体(氧含量0.2%~0.3%)。
With increasing of Nb content in the alloy, Nb tends to be seriously segregated, while distribution of Ti becomes more and more homogeneous, but when the content of Ti in the alloy being increased, segregations of Nb and Ti are all lessened. 结果表明:随合金中Nb含量增加,合金中Nb的偏析趋于严重。而Ti的分布则趋于均匀化;
The surface of anodizing film have homogeneous distributions of small holes and good combination between the film and matrix alloy is found by SEM. 用SEM对阳极氧化膜表面形貌和横截面形貌进行了观察,发现氧化膜表面形成了均匀孔洞,且与基体金属有很好的结合,并对此作出了合理的分析。
Cold crucible levitation melting has such advantages as operating simply, no contamination to the charge and homogeneous chemical composition, so it is suitable to melt titanium alloys and high purity alloy. 冷坩埚悬浮熔炼具有操作简单、对物料无污染、铸锭成分均匀等优点,特别适合钛合金、高纯合金等的熔炼。
Although many machine parts require good surface wear resistance and good internal toughness, homogeneous wear resistant material by adding strengthening phase alloy elements to high manganese steel has higher hardness and less toughness at the same time. 实际应用中,许多机器零(部)件要求材料表面耐磨而内部具有良好韧性,如果单纯在高锰钢中加入强化相合金元素制成均质耐磨材料,在提高材料硬度的同时往往会降低材料的韧性。
Al/ Al-4% Cu graded material was fabricated by stacking powder metallurgy processing. For comparison, the same processing was used for preparing pure Al homogeneous material and Al-4% Cu homogeneous alloy. 本研究利用堆层粉末冶金技术制备了Al/Al-4%Cu梯度材料,为了进行对比,采用相同制备工艺制备了纯Al均匀材料、Al-4%Cu均匀材料。