如果撇开气体渗碳和等离子渗碳,真空渗碳的最直截了当和最正确的定义,则是一种发生在金属内部的单纯渗碳和单纯扩散的工艺过程。这一定义可进一步阐述如下: 单纯渗碳黑色金属(一般指钢)的表面,处于真空状态下,能消除截留的气体或外来物质,它们可能阻止奥氏体中碳的饱和。奥氏体状态下的金属,很快由碳分饱和并达到最大的碳势值(如铁碳平衡图所示)。 If the most straightforward and most accurate definition of vacuum carburization, with the exception of gas carburizing and plasma carburizing, is a simple carburizing and simple diffusion process that takes place inside the metal. This definition can be further elucidated as follows: Pure carburizing Ferrous metal (usually steel) surfaces, under vacuum, eliminate entrapped gases or foreign substances that may prevent carbon saturation in austenite. Metals in the austenitic state are quickly saturated with carbon and reach the maximum carbon potential (as shown in the iron-carbon balance).