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钢的化学热处理广泛应用在机械制造、汽车制造以及航空工业中。钢经化学热处理后在保留基体钢材性能的同时,极大提高了零件表面的耐磨抗疲劳性能,从而大大提高零件的使用寿命。钢的化学热处理种类较多,目前应用最广泛的是渗碳、渗氮、碳氮共渗(氰化)、软氮化及渗铝、铬、硼、硅等,这里我们仅介绍渗碳、渗氮等化学热处理的金相检验。钢经化学热处理后优良性能的获得,主要取决于化学热处理层的深度和金相组织。到目
Steel chemical heat treatment is widely used in machinery manufacturing, automobile manufacturing and aviation industry. After the chemical heat treatment of the steel, the properties of the base steel are preserved, and the wear resistance and fatigue resistance of the surface of the part are greatly improved, thereby greatly improving the service life of the part. There are many types of chemical heat treatment of steel, the most widely used is carburizing, nitriding, carbonitriding (cyanidation), soft nitriding and aluminizing, chromium, boron, silicon, etc. Here we only introduce carburizing, Nitriding and other chemical heat treatment metallographic examination. The good performance of steel after chemical heat treatment depends mainly on the depth of the chemical heat treatment layer and the microstructure. To the head