Research on CuCr Mechanical Alloying Process

Study of mechanical alloying process Li Jinping Luo Shoujing Gong Chaohui Hu Weiyi Niu Yao Ningbo University, Harbin Institute of Technology Institute of Ordnance Industry, Institute of Applied Physics, Wuhan, China The ray diffraction test powder was used to measure the microstructure of the powder. The microstructure of the powder was analyzed by scanning electron microscopy. As well as the surface distribution of the elements, the influence of the mechanical alloying process parameters on the mechanical alloying process of the heart 1 is emphatically analyzed. Results The ball milling speed is a major factor affecting the mechanical alloying process. With the increase of ball milling speed, the effect of mechanical alloying is remarkable. No matter under the conditions of various process parameters, the powder is gradually refined with the prolongation of ball milling time. , 1 The two-phase distribution is gradually uniform, but the effect of alloying is not obvious. The comparison of ball material, 1 the influence of mechanical alloying is more complicated. Generally speaking, under the same conditions of other processes, with the increase of the ratio of ball and material, mechanical alloying. The effect is enhanced; only in the long ball milling time, the ratio of the ball material is changed to 101 inches, and the heart alloy alloy foot wave is widely adopted. The vacuum circuit breaker contact material of the social community 1 is dominant! Many studies at home and abroad have shown that the performance of materials depends on the microstructure, especially the size of the particles. Document 23, Ming, the microstructure refinement of the contact materials is uniform, and it can greatly improve its withstand voltage setting. Document 4 Geng Ming, 1. Gold particles, refinement, can be mentioned as a breakdown voltage, reduce the maximum cut-off value With the increasing use of vacuum circuit breakers and the development of high-voltage large-capacity and miniaturization, the right to touch The performance of the head material puts forward higher requirements. Therefore, the study of finer grained contact materials or microcrystalline contact materials with important mechanical alloying is a high-energy ball milling technique developed at the end of the 1960s by Lusong. Since then, through the efforts of material workers, many new materials have been synthesized by the mechanical alloying process, including amorphous alloy semi-finished products, intermetallic compounds, supersaturated solids, and so on. This article is called mechanical alloying. 1 Synthetic alloy powder, Erchang 7 was analyzed by X-ray diffraction analysis of the phase and SEM microscopic morphology and composition content, etc., to study mechanical alloying process parameters such as ball-milling speed ball ratio and ball milling time 1 Influence of the art 1 experimental method will be pure industrial, 1 powder 809! And self-made 1. Powder 80 mesh, 9 will be prepared by half the amount of cutting and quenching of the diameter of the ball into the stirred high-energy ball mill, under the protection of pure argon grinding, change the speed of the ball and fund project Ningbo Science and Technology Commission Youth Fund Funding.

Metallurgical and explosive sintering research has 5 papers. , Sheng 1 Shan Yang communication address Haar ball material ratio, after a fixed time ball mill to take a small amount of powder, ray diffraction and scanning electron microscopy analysis. The physics ray diffractometer was used to analyze the powder structure. 1 radiation, scanning speed is 150, using the 3360 scanning electron microscope to observe the micro-morphology of the mechanical alloying powder and measure the size, using the Shan 31 type, the old ray spectrometer for its composition analysis and elemental surface distribution analysis.

2 Experimental Results and Discussion 2.1 X-ray Diffraction Analysis ray ray Xie Xiange flings down the hill, look. 4001., 1 at a ball milling speed of 4001. 1 mechanical mechanization is similar. The 3 degrees continuously decreased, especially the diffraction peak of the high-angle diffraction region of Heren 5 was not obvious, and there was some amorphous. 1 In addition to the 1 phase diffraction peak, no other phase diffraction peaks were found. However, the intensity of the 0 phase diffraction bee changes with ball milling. As the milling time increases, the intensity of the diffraction peak of the mesh decreases continuously; the intensity of the phase diffraction peak continues to increase. The single crystal phase is continuously reduced in the ball mill, and the solid solution is formed in the crystal structure. It is a face-centered cubic structure and is a body-centered cubic structure. The face-centered cubic structure is the densest atomic dense structure, and the body-centered cubic structure. Not as good as before. From the solid sweet wood diffuser, Nong Jingzi's expansion in physical therapy is faster than facial masks. Therefore, under the above-mentioned diffusion power, it is possible for the Department to expand! Diffusion in the medium is faster than in the medium, so that the solid solubility in the solution is greater than the solid solution in the medium, and with the progress of the ball mill this process is more clear because the broadening of the diffraction peak is the micro strain, summation Because of the refinement of the crystallite size, it is possible to calculate the crystal grains in the 51 powders up to 18,0 crystallites up to 21 by the decrease in the intensity of diffraction peaks and the broadening of the diffraction peaks in the oxygen 6SAtademicJbumalElectronicPublishingHouse.AU. The deputy addition will be a squat, and comparison can also be seen that the ball-grinding oil is not as good as the ball-milling 5, which is close to 31, indicating that the ball-sanding speed is an important factor affecting the width of the diffraction peak and the intensity of the diffraction peak.

1 ball grinding speed 4001.1 different ball grinding time, 1 锾 embankment heart. In the case of the mixed powder having a ball milling ratio of 40 and 1 with a ball milling speed of 40,1, the results of the 2nd and Yoshihide images are similar to those of the meter. The intensity of the diffraction peak is continuously reduced, the diffraction peak is broadened, and no new phase appears. The ratio of the material to the melon instead, it can also be seen that when the ball grinding speed is the ratio of Cinderella as the case said that the foot 1. After grinding the ball 5, the intensity of the 1 phase diffraction peak begins to fall below. Phase, while the ratio of the other two kinds of balls, when the ball after grinding 31, lean to the elbow peak, the degree began to be lower than the ancestors can pull out. With the ratio of the ball and the material, the diffraction peak gradually broadens, and the diffraction intensity gradually decreases, and the intensity of the phase diffraction peak is higher than that of the 1 phase.

2.2 Scanning Electron Microscopy Analysis of the final microscopic morphology It can be seen that with the prolongation of the milling time, the powder particles are gradually refined. The majority of the ball-milling 51 powder particles are below the surface and the particle size is not uniform. The quantitative analysis, the arithmetic mean of its analysis results is listed in 1 from the river to see that the ball-to-grain ratio is 4, 1 ball grinding speed uniform.

Powder technology parameters, the content of the extreme results of uniform non-uniform and uniform 耵51 Hexue 51 powder micro-morphology and the corresponding 1. 兀 prime surface distribution of the results of the three powder morphology and Xiang Xiang like, that is gradually refined powder particles However, the particle size is not uniform, the morphology is irregular, and the ball-milling free powder and its both have been distributed uniformly, and the powder is similar to the mechanical alloying (3) powder, the ray-derived elbow analyte and the scanning electron microscope to analyze the powder shape. The appearance and distribution of 5 and 兀 兀 surface, the results show that 1 蔌 grinding speed is an important factor affecting the 1. mechanical alloying process, with the increase of the speed of the ball mill mechanical gold significantly increased the effect of `n`2 no matter what kind of workers B, number conditions with The ball mills, the interval between them, the powders are gradually refined, 1. The two-phase dew gradually becomes uniform.

3 The effect of mechanical alloying on the mechanical alloying process is relatively complicated. The same mutations appear in other process parameters, the powder has no topography 3 conclusions