共查询到20条相似文献,搜索用时 156 毫秒
1.
2.
以前苏联飞机机轮样件为依据 ,试制出含钕耐热高强Mg Nd Zn Zr系铸造镁合金。经对该合金的力学性能、铸造性能、焊接性能等进行测试 ,认为达到或超过了前苏联МЛ10镁合金标准 相似文献
3.
Mg-Nd-Zn-Zr耐热高强铸造镁合金 总被引:9,自引:1,他引:8
以前苏联飞机机轮样件为依据,试制出含钕耐热高强Mg-Nd-Zn-Zr系铸造镁合金。经对该合金的力学性能、铸造性能、焊接性能等进行测试,认为达到或超过了前苏联МЛ10镁合金标准。 相似文献
4.
5.
6.
7.
8.
Mg-AI系耐热镁合金的开发及应用 总被引:11,自引:3,他引:8
介绍了镁合金的高温蠕变机理和提高镁合金高温蠕变性能应采取的措施,综述了AZ系(Mg-Al-Zn)、AS系(Mg-Al-Si)、AE系(Mg-Al-RE)、AX系(Mg-Al-Ca)、ACM或MRI系(Mg-Al-Ca-RE)AJ系(Mg-Al-Sr)耐热铸造镁合金的研究开发状况及其在汽车上的应用状况,指出了Mg-Al系耐热镁合金存在的问题和今后的发展方向。 相似文献
9.
10.
11.
REVIEW ON RESEARCH AND DEVELOPMENT OF MAGNESIUM ALLOYS 总被引:7,自引:0,他引:7
The current research and development of magnesium alloys is summarized. Several aspects of magnesium alloys are described: cast Mg alloy, wrought Mg alloy, and novel processing. The subjects are discussed individually and recommendations for further study are listed in the final section. 相似文献
12.
为测试高速传动件上3D打印铝合金材料的耐磨性能,对3D打印铝合金(EOS:Al Si10Mg)与铸造铝合金(ZL1104T6:ZAl Si9Mg)进行性能对比测试。采用光学显微镜、电子扫描电镜、能谱分析仪、显微硬度计、高温摩擦磨损试验机等对两种材料进行微观组织分析,硬度测量,摩擦磨损值测定。结果表明,3D打印铝合金其微观组织下晶粒更精细,并且各合金元素分布均匀性更好;3D打印铝合金硬度平均值略高于ZL1104 T6;3D打印铝合金的摩擦因数曲线更平滑,摩擦因数平均值及磨损失重率均小于ZL1104 T6,证明在相同的摩擦磨损条件下,3D打印铝合金表现出良好的耐磨性。 相似文献
13.
14.
About some corrosion mechanisms of AZ91D magnesium alloy 总被引:2,自引:0,他引:2
The present work is dedicated to a study of the corrosion resistance of AZ91D (91% Mg) alloy in wet environments. Three industrial alloys obtained by die-casting or sand casting were subjected to salt spray corrosion tests (ASTM-B117 standard) and immersion tests. Weight loss kinetic curves were measured. Surface analysis was performed by X-ray photoelectron diffraction (XPS). After corrosion the sand cast alloy presents a surface mainly enriched in hydroxides and carbonates while the die-cast alloy presents a surface enriched also in mixed Mg-Al oxides. The quantitative analysis of the rate Mg/Al shows an enrichment in aluminium for the die-cast alloys in comparison to the sand cast alloy. 相似文献
15.
高硼铸造耐磨合金研究的进展 总被引:8,自引:0,他引:8
在介绍了普通铸造耐磨钢铁材料存在着韧性和耐磨性不足的基础上,提出了用含有高韧性马氏体和高硬度硼化物的高硼铁基铸造耐磨合金取代普通铸造耐磨钢铁材料的设想,着重介绍了高硼铸造耐磨合金的成分、组织、性能及其应用,指出了高硼铸造耐磨合金研究和应用中存在的问题,最后提出了开发高硼铸造耐磨合金值得重视的若干问题。 相似文献
16.
As most Mg alloy products are now produced by a casting process,the development of high strength cast Mg alloys can promote their further applications and has already become one of the hot research areas of Mg alloys.The present paper reviews the strengthening mechanisms,tensile properties and modification results of commercial high strength cast Mg alloys;as well as the development of Mg-Gd,Mg-Nd and Mg-Sn based alloys.It concludes that precipitation strengthening is the most important strengthening mechanism in high strength cast Mg alloys,which contributes more than 60%of yield strength in solution&peak-aged(T6)cast Mg alloys.For the yield strength,the alloys follow the sequence of Mg-Gd(Y)-Ag〉Mg-Gd(Y)-Zn〉Mg-Gd-Y/Sm/Nd〉Mg-Y-Nd(WE series)〉ZK61〉Mg-Nd〉AZ91〉Mg-Sn.Mg-Gd(Y)-Ag based alloys are the strongest cast Mg alloys at present,followed by Mg-Gd(Y)-Zn based alloys.The high yield strengths of Mg-Gd(Y)-Ag and Mg-Gd(Y)-Zn cast alloys are due to the co-precipitation of basal and prismatic meta-stable phases. 相似文献
17.
镁合金较差的耐腐蚀性能限制了其大规模应用。利用表面腐蚀防护技术可以有效改善镁合金的耐蚀性能,延长镁合金的服役寿命。因此,可靠的表面腐蚀防护技术是突破镁合金应用瓶颈的关键。从镁合金表面腐蚀防护技术的分类入手,阐述了各种防护技术的基本原理。在此基础上,综述了近年来镁合金腐蚀防护技术的研究进展,包括电化学方法、化学方法及其他表面腐蚀防护方法等,阐明了各种技术的优缺点及适用范围,并对镁合金表面防护技术的发展趋势进行了展望。经过多年的发展,镁合金表面防护技术的理论研究和应用日臻完善,现有的表面防护方法一定程度上都能为镁合金基体提供腐蚀防护作用。然而,随着镁合金应用范围的扩展,相关结构件常会面临恶劣的服役环境。因此,单一的表面腐蚀防护技术已经很难满足工业领域对镁合金材料的迫切需求,多种表面处理技术联合制备的复合涂层具有广阔的应用前景。镁合金表面防护技术当前正朝着功能化和智能化的复合涂层方向发展,同时对制备工艺的安全环保性也提出了更高要求。未来除了保证高耐蚀性外,开发多功能智能涂层对提升防护层的长效防护能力、拓宽镁合金的应用范围具有重大的现实和长远意义。 相似文献
18.
目的研究镍添加对冷喷涂锌基涂层耐蚀性的影响,为镁合金提供有效的防护涂层。方法采用低压冷喷涂技术在镁合金基体表面分别制备锌基和锌/镍基复合涂层,通过微观观察、摩擦磨损实验、电化学极化法和电化学阻抗谱测试及全浸泡腐蚀试验,研究镁合金表面冷喷涂涂层的结构、摩擦磨损行为和耐蚀性。结果镁合金表面冷喷涂锌基涂层后,其硬度和耐磨性得到显著提高,掺镍后的锌/镍基涂层具有更高的硬度和耐磨性。锌基和锌/镍基涂层均能为镁合金提供腐蚀防护,锌/镍基涂层比锌基涂层具有更好的耐蚀性。相对镁合金来说,锌基涂层和锌/镍基涂层的自腐蚀电位分别正移了260 mV和560 mV;长期腐蚀后锌/镍基涂层形成了更致密的腐蚀产物膜,腐蚀电阻显著高于锌基涂层。结论冷喷涂锌基和锌/镍复合涂层均能对镁合金提供防护作用,掺杂镍后的锌/镍基复合涂层具有更高的硬度、耐磨性和耐蚀性。 相似文献
19.
Poor corrosion resistance limits the application of magnesium alloys.Conversion coating is widely used to protect magnesium alloys because of easy operation and low cost.A novel conversion coating on die-cast AZ91D magnesium alloy containing barium salts was studied.The optimum concentrations of Ba(NO_3)_2,Mn(NO_3)_2 and NH_4H_2PO_4 are 25 g/L,15 mL/L and 20 g/L,respectively,based on orthogonal test results.The treating time,solution temperature and pH value are settled to be 5-30 min, 50-70℃and 2.35-3.0... 相似文献
20.
Microstructure,tensile properties and compressive creep resistance of Mg-(5-8.5)%Sn-2%La alloys 总被引:2,自引:0,他引:2
The microstructure,tensile properties and compressive creep resistance of permanent-mould cast Mg-(5-8.5)%Sn-2%La (mass fraction) alloys were investigated.The results show that Mg-(5-8.5)%Sn-2%La alloys are all composed ofα-Mg phase, Mg_2Sn and Mg-La-Sn compounds.Compared with those of Mg-5%Sn binary alloy,the grain size and the content of Mg_2Sn compound in Mg-5%Sn-2%La alloy are decreased.With the increase of Sn content in Mg-(5-8.5)%Sn-2%La alloys,the content of Mg_2Sn compound increases,while that of... 相似文献