| With the studying in the area of the metallic glass, amorphous materials have made a lot of attention and research because of their unique performances. And the Fe-based metallic glass with good magnetic performance is the one which be widely used in factory. Today, many amorphous materials have been produced in factories. But the performances of metallic glass are worse than the one be prepared in laboratory. The reasons include the following two sides:first, the materials. The materials used in factories were not as clean as in laboratory. And more important, in the annealing step, they always anneal a lot of metallic glass by one time. For this, it wasn’t symmetrical in this step, which reduced the magnetic performance. To solve this problem, in this paper we chose the composition of Fe36Co36Si4B20Nb4, which has a large ΔTx. We study the effects of the different crafts on the soft magnetic performance. We tried to find a craft by which we can prepare the amorphous strips with good soft magnetic performance but without annealing. The study in this paper included the following aspects:1. Prepare the glass strips of the composition by the usual way, test it by XRD. From its result, we made sure that the strips were metallic glasses. And we got the ATx is43℃and the best annealing craft.2. We set a baffle be apart from the wheel by15cm. We prepared the amorphous strips with different levels of fold with different crafts, such as different speed of the wheel, whether open the cooling water and so on. Then we removed the baffle and prepared the straight ribbons if it was needed;3. To get the purpose, it needs to get its stress released in the preparing process. So the key of preparing the purpose ribbons was to control the ribbons’temperature at the time when they leave the wheel. If the temperature was too low, they would not release enough internal stress. So they would have the good soft magnetic performance, unless they got annealed. If the temperature is too high, they would crystallize. So they wouldn’t have good magnetic performance.4. After annealing the ribbons prepared with different crafts in the same way, test their soft magnetic properties. Then analyze the reason why they got the different properties to get how to get the purpose ribbons.The study of annealing needless ribbons can fully solve the problem of uneven annealing. So in this way, the performance of the production can be improved. Because the annealing needless ribbons didn’t need be annealed, the cost of this process can be saved completely. So there are great economic benefits and great application prospect.In this paper, we studied the composition changing of the metallic glass whose composition is Fe73.5Si13.5B9Cu1Nb3which be produced in factories. For this, we made the expensive Nb be replaced by the cheap Mo. The purpose is to reduce the cost of the metallic glass producing without much dropped in its magnetic performance. This paper included the following aspects about this study:1. The composition design. We changed the composition by steps. So we got another two compositions, Fe73.5Si13.5B9Cu1Nb1.5Mo1.5&Fe73.5Si13.5B9Cu1Mo3;2. After annealing the strips with the different composition, we test them with XRD. From the result we found that they were also metallic glass;3. From the result of the coercive force and the magnetic conductivity test, we found that when the all Nb was replaced by Mo, the coercive force nearly didn’t change while the magnetic conductivity reduced. The soft magnetic performance reduced in general. But when the Nb was replaced partly, the coercive force and the magnetic were all reduced. But the soft magnetic performance increased;... |
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