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在奥氏体不锈钢上,低温等离子辅助渗氮产生所谓的“扩展奥氏体”。由基体的原始表面沿垂直表面方向产生的这种渗氮层的扩展,此处通常的含义是通过几种掩模选择氮扩散产生的有图案的表面。用的栅网能得到一种精确的正方形点。在这次交流中介绍了在奥氏体不锈钢基体上预先用一种有图案的氧化硅层覆盖进行渗氮的结果。也说明了在几种不同形状(园的和正方的点)混合的氧化硅掩膜和扩展奥氏体之间的相互作用。氮的扩散,和实验条件的一致及掩膜的特点非常重要。根据点的尺寸,会导致掩膜简单的均匀变形,或者在掩膜边缘有大畸变的明显变形。这种现象被视为一种环形壳状畸变。光截面似乎证明这仅仅是由于氮扩散正好在掩膜边缘的下面引起奥氏体扩展垂直力的结果。
On austenitic stainless steels, low temperature plasma-assisted nitriding produces so-called “extended austenite.” The expansion of this nitrided layer, which results from the original surface of the substrate in the direction perpendicular to the surface, is generally referred to herein as a patterned surface created by the selective diffusion of nitrogen through several masks. The grid used to get a precise square point. In this exchange, the results of nitriding pre-coated with a patterned silicon oxide layer on an austenitic stainless steel substrate are described. Also illustrated is the interaction between the mixed silicon oxide mask and expanded austenite in several different shapes (at the park and the square points). The diffusion of nitrogen, consistent with the experimental conditions and mask characteristics is very important. Depending on the size of the spot, the mask can be simply and uniformly deformed, or there is a significant distortion of large distortion at the edge of the mask. This phenomenon is considered as a toroidal shell-like distortion. The light cross section seems to prove that this is only the result of the nitrogen diffusion just causing vertical austenite spreading under the edge of the mask.