论文部分内容阅读
将经水韧处理后的试样加热到570℃保温1小时(回火),使碳化物充分析出,试验结果表明,在脱碳层中碳化物仅沿奥氏体晶界析出呈细线破碎网状或封闭网状;而心部除网状外,在晶界或晶内析出大量的块、团状碳化物,因此,从表面测至晶界的一半位置被块、团状碳化物所占据处的垂直距离即为脱碳层深度,试验证明,此法较准确,简便易行。
After toughening, the sample was heated to 570 ° C for 1 hour (tempering) to fully precipitate the carbides. The experimental results showed that the carbides precipitated in the decarburized layer only along the austenite grain boundaries, Reticular or closed mesh; and the heart in addition to the mesh, the grain boundaries or intragranular precipitation of a large number of lumps, clusters of carbides, so measured from the surface to the half of the grain boundaries by the block, Occupy the vertical distance is decarburization depth, test proved that this method is more accurate, simple and easy.