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Inthispaper,thediffusionquantityofdifferenttemperaturesandunittimehavebeeninvestigate...
In this paper, the diffusion quantity of different temperatures and unit time have been investigated basing on experimental results and theoretical analysis. The diffusing parameters of molten tin in the reaction process is investigated according to diffusing formula. The results within the range of 260~350℃ indicates that the diffusing activation energy is increased with the time until the reaction ceases and it is decreased with the increasing of the temperature and substrate vacancy, but the average diffusing constant of tin increased with the temperature.
It is the ideal bearing that the oil film bearing is widely applied in heavy rolling machinery, which has smooth operation, low friction coeffcient, low cost and long service life. Babbit alloy bush has been applied in the bearing alloy of cold or hot strip milling because of its good surface performance, but the premature invalidation of bush may mainly be resulted from gluing, cracking, dropping and so on[1,2]. It must be get satisfactory adhension to the substrates of both babbit alloy and bush that improving the babbit alloy’s performance, especially its wear resistance, which can prolong life and decrease the malfunction of the main equipment. Therefore, in order to have higher adhesive strength of the oil film bearing, a thin layer of tin is precoated that form a transition region of FeSn-FeSn2[3,4] on the surface of bush, then the functional layer is spayed again. Obviously, it is an important problem that reserach the reaction of the iron and molten tin.
Brushing a thin layer of tin on the bush at 280℃~300℃ during mannufacture, while theexperiments were carried out in 260℃~350℃. The tin atomic radius is 1.41×10-10 m and the iron atomic radius is 1.24×10-10 m, which has little difference, so it is vacancy diffusion that tin atom diffuse towards the matrix interface. If no concerning about the influence on other components, tinatom spreading to the adjioning vacancy of surface of the matuix only contact and impact with iron atomic, which can be formed FeSn solid solution. The outside higher energy tin atom spread the place of the previous atom arriving and impacting so that it can enter inner vacant. This form repeats itself in endless cycles until the end of the reaction.
Through research of Kinetics Study on Reaction of Iron and Molten Tin[5], the molar quantity of tin can be obtained that it diffuse into matrix unit-time and unit area at different tempertures, in fact,it is the diffusion coefficient。 展开
It is the ideal bearing that the oil film bearing is widely applied in heavy rolling machinery, which has smooth operation, low friction coeffcient, low cost and long service life. Babbit alloy bush has been applied in the bearing alloy of cold or hot strip milling because of its good surface performance, but the premature invalidation of bush may mainly be resulted from gluing, cracking, dropping and so on[1,2]. It must be get satisfactory adhension to the substrates of both babbit alloy and bush that improving the babbit alloy’s performance, especially its wear resistance, which can prolong life and decrease the malfunction of the main equipment. Therefore, in order to have higher adhesive strength of the oil film bearing, a thin layer of tin is precoated that form a transition region of FeSn-FeSn2[3,4] on the surface of bush, then the functional layer is spayed again. Obviously, it is an important problem that reserach the reaction of the iron and molten tin.
Brushing a thin layer of tin on the bush at 280℃~300℃ during mannufacture, while theexperiments were carried out in 260℃~350℃. The tin atomic radius is 1.41×10-10 m and the iron atomic radius is 1.24×10-10 m, which has little difference, so it is vacancy diffusion that tin atom diffuse towards the matrix interface. If no concerning about the influence on other components, tinatom spreading to the adjioning vacancy of surface of the matuix only contact and impact with iron atomic, which can be formed FeSn solid solution. The outside higher energy tin atom spread the place of the previous atom arriving and impacting so that it can enter inner vacant. This form repeats itself in endless cycles until the end of the reaction.
Through research of Kinetics Study on Reaction of Iron and Molten Tin[5], the molar quantity of tin can be obtained that it diffuse into matrix unit-time and unit area at different tempertures, in fact,it is the diffusion coefficient。 展开
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在本文中,扩散量的不同温度和时间单位进行了调查,根据实验结果和理论分析。扩散参数的熔融锡反应过程中进行扩散公式。结果的范围内的260~350℃表明,扩散活化能随反应停止,直到它是随温度的升高和基板的空缺,但平均扩散常数随温度的锡。
它是理想的轴承,油膜轴承广泛应用于重型机械,具有运行平稳,低摩擦系数,成本低,使用寿命长。巴氏合金轴瓦已应用于轴承合金冷轧或热轧带钢表面因其良好的性能,但过早失效衬套可能主要是导致粘,开裂,脱落等[ 1 , 2]。它必须得到满意的粘附到基板两个巴氏合金轴瓦巴氏合金和改善合金的性能,尤其是耐磨损,可延长寿命,减少故障的主要设备。因此,为了有更高的粘接强度的油膜轴承,薄薄的一层锡覆膜,形成一个过渡区fesn-fesn2[ 3 , 4]的表面,然后再分离功能层。显然,这是一个重要的问题,研究了反应的铁和锡。
刷薄薄的一层锡林在280℃~300℃在制造,而实验进行了260℃~350℃。锡原子半径是1.41×10 - 10米和铁原子半径是1.24×10 - 10米,有小的差别,所以它是空位扩散,锡原子扩散到基体的界面。如果没有有关的影响的其他组成部分,tinatom蔓延到adjioning空缺表面的matuix只接触和影响的铁原子,它可以形成fesn固体溶液。外部能量较高的锡原子扩散发生前原子到达和影响使它可以进入内部空。这种形式循环往复以至无穷结束为止的反应。
通过研究反应的动力学研究铁和锡液[ 5 ],摩尔量锡可以得到它扩散到矩阵单位时间和单位面积在不同温度,事实上,它的扩散系数。
它是理想的轴承,油膜轴承广泛应用于重型机械,具有运行平稳,低摩擦系数,成本低,使用寿命长。巴氏合金轴瓦已应用于轴承合金冷轧或热轧带钢表面因其良好的性能,但过早失效衬套可能主要是导致粘,开裂,脱落等[ 1 , 2]。它必须得到满意的粘附到基板两个巴氏合金轴瓦巴氏合金和改善合金的性能,尤其是耐磨损,可延长寿命,减少故障的主要设备。因此,为了有更高的粘接强度的油膜轴承,薄薄的一层锡覆膜,形成一个过渡区fesn-fesn2[ 3 , 4]的表面,然后再分离功能层。显然,这是一个重要的问题,研究了反应的铁和锡。
刷薄薄的一层锡林在280℃~300℃在制造,而实验进行了260℃~350℃。锡原子半径是1.41×10 - 10米和铁原子半径是1.24×10 - 10米,有小的差别,所以它是空位扩散,锡原子扩散到基体的界面。如果没有有关的影响的其他组成部分,tinatom蔓延到adjioning空缺表面的matuix只接触和影响的铁原子,它可以形成fesn固体溶液。外部能量较高的锡原子扩散发生前原子到达和影响使它可以进入内部空。这种形式循环往复以至无穷结束为止的反应。
通过研究反应的动力学研究铁和锡液[ 5 ],摩尔量锡可以得到它扩散到矩阵单位时间和单位面积在不同温度,事实上,它的扩散系数。
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