低碳易切钢奥氏体氮碳共渗层时效研究

Study on the Ageing Process of Austenitic Nitrocarburizing Layers of Low carbon Free Cutting Steels

本文研究了不同的时效工艺参数对低碳易切钢经奥氏体氮碳共渗快冷的渗层组织、显微硬度及力学性能的影响。结果表明，低碳易切钢奥氏体氮碳共渗经人工时效后产生内侧化合物层沉淀硬化和奥氏体层相变的综合效应。

In this paper,the effects of different ageing process parameters after fast cooling of austenitic nitrocarburizing of low carbon free cuting steels on microstructure,microhardness and mechanical properties is stu died The results showed that,after artificial ageing,the combined effects of precipitation hardening in the inside compound layer and the phase transformation in hardening layer may be induced on the nitrocarburized and fast cooling low carbon free cuting steels This process is one of the effective method for small size parts to surface hardening