| Metallic fiber is an important field in material subject. Stainless steel fiber not only has its owner good properties, but also has its remarkable physical properties. At present, the most common method of making metallic fiber is the bundle-drawing technology.. Its making process makes fiber's interior structure and surface property occur remarkable variation. So its price has doubled. Stainless steel fiber cannot only resistant to corrosion and high temperature, but also be soft and be spun. So it is widely used in many fields. Its manufacture craft is special, and any coefficient's change for the process of drawing and heat treatment will affect the deformation of fiber. Of late years, with the development of science, special property of superfine stainless steel fiber is paid more attention, such as metallic fiber felt of high filtering accuracy is made of superfine metallic fiber, but superfine fiber's surface question makes webbing not uniform, and affects felt's filtering accuracy. So it is necessary to improve the surface of superfine fiber and not to influence the property of product. Till now, this research is very lack, so it is necessary for us to study the metallic fiber. In the paper we use surface modification reagent to improve fiber's surface. To research the volatilization rate of modification reagent in vacuum, changes of friction factors for modified fiber, changes of corrosion rate for sintered modified fiber, and to research effect of modified fiber vs. uniform of fiber felt. It is resulted that:1. For PEO, with the temperature rising in vacuum, the volatilization rate increases, at about 270 C, vacuum rate falls to the lowest, which shows that volatilization amount is the biggest; volatilization rate is close to 100% at 420 C, and the remainder mainly contains C, whose amount is about 0.1%.2. For silicone oil, with the temperature rising in vacuum, the volatilization rate increases. The changes of vacuum rate are the most remarkable during 480 C-550 C. when the temperature is at 520 C, the volatilization rate of modification reagent is 99%. If we go on raising the temperature, the volatilization rate can attain 100%.3. Heat flow tests for the two modification reagents show that there is decompose reaction during heat treatment, and the products volatilize as small molecule.4. To the same stainless steel fiber, the small the diameter is, the bigger friction factor of fiber surface is. The friction factor of modified fiber's surface is clearly reduced with the concentration of modification rising. What is more, when the concentration of modification substance rises to some extent, there are no exchanges for the friction factor of fiber surface.5. If we make 0.4%PEO modify the fiber, the surface friction factor attains the aim; If we make 0.5%PEO modify the fiber, the change of friction factor is very small; If we make 1.5% silicone oil modify the fiber, the surface friction factor attains the aim, and if we increase the concentration, the change of surface friction factor is very little.6. Under the same corrosion condition, the smaller the fiber's diameter is, the bigger the corrosion rate is. If we choose the concentration of 0.4%PEO to modify the fiber that is sintered later, the corrosion rate conforms to function demands. If we increase the concentration of modification reagent, the corrosion rate of the modified fiber, which is sintered, exceeds function demands. The test that the modified fiber by 0%-2% silicone oil is sintered shows the change of the corrosion rate was not obvious and its property conformed to theory demands.7. The smaller the diameter is, the bigger the surface friction factor is, and the webbing is more difficult. The web case of the modified fiber is also better and the finished product rate is also improved. Compare with the result that different modification reagent modify the fiber, and we can draw a conclusion: webbing effect of the modified fiber by PEO get improved to some extent and web effect of the modified fiber by... |
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