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Magnesium neodymium alloy
mgnd25 alloy
mgnd30 alloy
mgnd35 alloy
Study on microstructure and Corrosion properties of rare earth magnesium alloys
The application of high performance magnesium alloys in automobile has been gradually mature, and the strength, toughness and high temperature properties of magnesium alloys have been greatly improved. However, poor corrosion resistance is the main factor hindering the application of magnesium alloys. At present, the research on the effect of Nd on the corrosion properties of Mg-Al-Zn alloy is not perfect, so it is of great practical significance to study the effect of Nd on the corrosion properties of Mg-Al-Zn alloy and discuss the corrosion mechanism of neodymium-containing magnesium alloy by heat treatment process. In this paper, the influence of Nd on AZ80 magnesium alloy under heat treatment was studied by means of analysis equipment and research methods such as optical microscope,XRD diffracraceter, scanning electron microscope, Brinell hardness tester brine soaking experiment and electrochemical testing system. By analyzing the influence of Nd on the microstructure and corrosion properties of AZ80 magnesium alloy under different heat treatment states, AZ80 magnesium alloy was compared with A The difference of microstructure and corrosion behavior of Z80+1%Nd magnesium alloy was investigated to investigate the corrosion properties of AZ80 and AZ80+1%Nd magnesium alloy. The results show that the microstructure of AZ80 magnesium alloy can be improved by adding 1%Nd, and the Mg_(17)Al_(12) phase with continuous network distribution can be transformed into fine discontinuous skeletal distribution, and the rod-shaped Al_3Nd phase and massive Al_2Nd phase with high thermal stability can be produced. In solid solution state, Mg_(17)Al_(12) phase is dissolved in α-Mg matrix,Al forms Al_3Mg2 phase from saturated solid solution, and Al_3Nd phase and Al_2Nd phase of rare earth phase are almost insoluble in matrix. In the aging state, β phase was continuously distributed in and between grains at higher temperature, and discontinuously distributed in grain boundaries at lower temperature. The optimum solution treatment process of AZ80 magnesium alloy was 420ºC×12h and the optimum aging treatment process was 175ºC×28h
Spectrometric determination of iron, nickel, molybdenum, copper and silicon in magnesium neodymium alloys
Magnesium neodymium alloy is an alloy needed by aviation, aerospace and other industries. It has the advantages of light gravity and high strength, so it attracts people's attention. According to the requirement of smelting, a method for the spectral analysis of Fe, Ni, Mo, Cu and Si in magnesium neodymium alloy was established. This method has the advantages of good reproducibility, high recovery rate, simplicity and convenience, and is easy to popularize. Instrument: KNS P. -28 medium spectrometer, three-lens lighting system, middle light bar 5mm, slit width 12μm. Dc solitary, powder method,5A, anode excitation, exposure 41S. Sample: magnesium neodymium alloy was washed with dilute to remove the external dirt, and then distilled water, deionized water, secondary distillation.
A method for preparation of neodymium intermediate alloy from NdFeb magnet waste
The invention discloses a method for preparing magnesium neodymium intermediate alloy by using ndFeb magnet waste; Using ndFeb magnet waste as raw material, diffusion reduction in high temperature magnesium liquid; The middle and upper molten liquid is poured into the ingot mold to obtain the Mg-neodymium intermediate alloy. The invention has the advantages of simple process, low production cost, and broadens the recycling mode of NdFeB waste material; The Nd content of Mg-Nd intermediate alloy is about 3%-21% according to the different material ratio. The Nd recovery rate can be as high as 60-70%, and the Nd recovery rate can be further improved by about 10% after recycling the lower melt. Impurity element Fe+B content < It can be used as Nd intermediate alloy in rare earth magnesium alloy industry and reduce the cost of rare earth magnesium alloy. In addition, this process can also be used as one of the low-cost methods for adding Nd element to rare earth magnesium alloys.
Preparation of Mg-neodymium intermediate alloy by electrolysis in fluoride molten salt system
In this paper, a new method of electrolysis for the preparation of magnesium neodymium intermediate alloy in fluoride molten salt system is introduced. By controlling the composition of molten salt, electrolytic temperature, cathode current density and feeding rate, Mg-Nd intermediate alloy has been prepared with ideal quality, reasonable technology and low production cost.
The invention relates to a preparation method of rare earth magnesium alloy and rare earth yttrium nd alloy
The invention relates to a preparation method of rare earth yttrium neodymium magnesium alloy and rare earth yttrium neodymium magnesium alloy. Graphite block is used as anode, molybdenum rod as inert cathode and molybdenum crucible as alloy acceptor. The mixture of yttrium oxide, neodymium oxide and magnesium oxide is added into the fluoride molten salt electrolyte system composed of yttrium fluoride neodymium fluoride lithium fluoride, and the rare earth yttrium neodymium magnesium alloy is obtained by direct current electroelectrotion. Among them, the mass ratio of each component of the fluoride molten salt electrolyte system is: yttrium fluoride: neodymium fluoride: lithium fluoride =(520):(7090):(510); By mass percentage, magnesium oxide =(9980):(120), and neodymium oxide: yttrium oxide =(991):(199); The electrolytic temperature is 10501150ºC. Its advantages are: simple process, low cost, stable product composition, process process only produces CO
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