共查询到20条相似文献,搜索用时 166 毫秒
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研究了添加微量稀土氧化物对WC-8Ni硬质合金物理机械性能的影响。在用X射线衍射、扫描电镜及透射电镜等手段对含稀土WC-8Ni合金进行显微结构分析的基础上,探讨了稀土在合金中的分布状态、对组织结构的影响及其强化机理。并指出,通过添加微量稀土氧化物,可使WC-8Ni硬质合金的物理机械性能接近和达到YG8的水平。 相似文献
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研究了添加微量稀土氧化物对WC-8Ni硬质合金物理机械性能的影响。在用X射线。射、扫描电镜及透射电镜等手段对含稀土WC-8Ni合金进行显微结构分析的基础上,探讨了稀土在合金中的分布状态、对组织结构的影响及其强化机理。井指出,通过添加微量稀土氧化物,可使WC-8Ni硬质合金的物理机械性能接近和达到YG8的水平。 相似文献
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稀土对高强Al—Zn—Mg—Cu合金耐蚀性能的影响 总被引:4,自引:0,他引:4
采用化学失重法,考察了稀土对Al-Zn-Mg-Cu高强铝合金耐蚀性能的影响,研究结果表明,在不同介质中,加稀土的Al-Zn-Mg-Cu比Al-Zn-Mg-Cu高强铝合金有较高的耐腐蚀性能,在还原性介质中的耐腐蚀更好,稀土含量控制在0.05%为宜。 相似文献
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本文介绍Cu、Ni作为使金元素对钢的耐大气腐蚀性能的影响Cu、Ni作为合金元素对钢的耐大气腐蚀性能的影响,Cu、Ni对钢材力学性能的影响,及Cu、Ni在薄板坯连铸轧中的危害和防治。 相似文献
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本文设计了新型铸造Ni-Cu合金的化学成分,并通过多种腐蚀试验方法研究了该合金的均匀腐蚀、晶间腐蚀及点蚀行为。试验结果表明,铸造Ni-Cu合金具有良好的均匀腐蚀与局部腐蚀性能。此外,该合金还具有较好的综合机械性能与铸造性能。 相似文献
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微晶WCNi合金的机械性能日本千页工艺研究所工程部研究了由碳化物粘结的微晶WCNi合金的机械性能。他们将添加10wt%VC作粘结剂的微晶WC10wt%Ni中间合金在1450~1500℃于真空中烧结,原料WC粉粒径为07~14μm。主要研究了... 相似文献
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少量Mn对Cu—15Ni—8Sn合金时效硬化的影响 总被引:1,自引:0,他引:1
张利衡 《有色金属材料与工程》1996,17(2):62-67
本文对真空熔铸含Mn量为0.46wt%的Cu-15Ni-8Sn合金的时效硬化,形变时硬化过程及其组织变化作了研究。实验证明:(1)0.46wt%Mn固溶于Cu-15Ni-8S合金中;(2)含少量Mn的合金的时效硬化,形变时效硬化及组织变化的基本特征与不含Mn的Cu-15Ni-8Sn的合金相类似,但少量Mn延缓合金的时效,形变时效过程,增加硬化效果。 相似文献
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预弥散强化镍粉——硬质合金的新型粘结剂 总被引:5,自引:0,他引:5
叙述了以预弥散有纳米Al2O3的镍粉代替钴粉作粘结剂以提高WCNi硬质合金性能方面的初步研究;制得的WCNi硬质合金的物理机械性能可达到WCCo合金的水平 相似文献
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Influence of Rare Earths on the Directional Solidification Microstructure of Tin-Lead Eutectic Alloy
InfluenceofRareEarthsontheDirectionalSolidificationMicrostructureofTinLeadEutecticAloyZhuYing(朱颖),FangHongyuan(方洪渊),QianYiyu... 相似文献
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Effects of RE on Microstructures and Mechanical Properties of Hot-Extruded AZ31 Magnesium Alloy 总被引:4,自引:2,他引:4
Effects of rare earth (RE) additions on microstructure and mechanical properties of the wrought AZ31 magnesium alloy were investigated. The results show that, by adding 0.3%, 0.6% and 1.0% RE elements, the as-cast microstructure can be refined, and the as-cast alloys‘ elongation and tensile strength can be improved. After extrusion, the alloy with 0.3 % and 0.6% RE additions obtain a finer microstructure and the best mechanical properties, but the alloy with 1.0% RE addition has the coarse A1-RE compound particles in grain boundaries which decreased elongation and tensile properties. Usually, Rare earth (RE) elements were used to improve the creep properties of aluminium-containing magnesium pressure die cast alloys at elevated temperatures. In this paper, it is also found that the high temperature strength of extruded materials can be increased by RE elements additions. 相似文献
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Effects of Rare Earth Elements on Properties and Structure of WC-14TiC-8Co Cemented Carbide 总被引:2,自引:0,他引:2
EffectsofRareEarthElementsonPropertiesandStructureofWC-14TiC-8CoCementedCarbideHeCong-Xun;(贺从训);WangYou-Ming;(汪有明);LinChen-Gu... 相似文献
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Effect of Rare Earths on Microstructure and Properties of TiC-based Cermet/Cu Alloy Composite Wear Resistant Materials 总被引:1,自引:0,他引:1
The effect of rare earth (RE) oxide on the microstructure and properties of TiC-based cermet/Cu alloy composite hardfacing materials was investigated by using scanning electron microscope (SEM), transmission electron microscope(TEM), impact test and wear test. The mechanism of RE oxide for improving the phase structure and the impact toughness was also discussed. The experimental results indicate that the microstructure of the matrix can be refined, and the micro- porous defects can be eliminated by adding RE oxide into the composite materials. The polycrystalline and amorphous phase structure is formed at the interface of cermet and matrix metal. The formed structure enhances the conjoint strength of interface. The frictional wear resistance can be improved obviously, although the microhardncss of the matrix metal can not be effectively increased by adding RE oxide. 相似文献
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Effect of Rare Earth on Microstructure of Vacuum Melting Ni-Based Self-Fluxing Alloy Coatings 总被引:7,自引:0,他引:7
The Ni-based self-fluxing alloy coating containing RE was acquired by the technique of vacuum melting on the hypoeutectoid steel (Fe-0.45% C) matrix. By X-ray diffraction, SEM and EDX, the microstructure and phase structure of section of coating and the microstructure near the interface between coating and matrix were investigated, and the effect of RE on microstructure of coating was also discussed. The results show that the microstructure of the NiCrBSi alloy coating is composed of Ni-based solid solution and a lot of massive, globular and needle secondary phases CrB, Ni3B, Cr7C3, Cr23C6 among the solid solution. The metallurgical binding between steel matrix and coating is realized. RE makes needle phase of alloy coating vanish. New phases of NiB and Cr6.5Ni2.5Si are precipitated from alloy coating, and secondary phases of alloy coating are sphericized. Consequently, RE also hinders the diffusion of Ni, Cr and Si atoms from coating to matrix and Fe atoms from matrix to coating, holds back the dilution of Fe for NiCrBSi alloy coating, and assures the chemical composition of the alloy coating. 相似文献
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在研制稀土AlMg3W合金的基础上.采用金相观察、X射线衍射等手段,并通过力学性能、耐磨性能、焊接性能、热膨胀性能等对比测试,系统地分析了稀土对AlMg3W合金显微结构及物理性能的影响。结果表明,当稀土含量为0.05%时,稀土AlMg3W合金的性能最佳。 相似文献