【摘要】 研究了稀土在模具氮碳共渗中的作用机理、共渗工艺、渗层组织、性能及其影响因素．结果表明，稀土在模具氮碳共渗中不仅具有较强的催渗作用，而且具有明显的表面强化效果．经稀土氮碳共渗后的热作模具，其使用寿命可提高1～2倍，且工艺简单，成本显著降低．更多还原

【Abstract】 The mechanism, processes, structures, properties and influence factor of rareearth on low -temperature nitrcarburising for dies & molds have been investigated. Resultsshow that not only is Rare Earth an excellent catalyst, but also has it a strong effect in surface strengthening. Treated by Rere Earth nitrocarburising, the life span of the hot - workdies & molds can be prolonged 1- 2times, and the process is simply,cost is lower.更多还原