稀土元素在模具钢硫氮碳共渗中的作用聂学渊胡正前陈思维汪晓霞武汉工业大学１前言在建筑行业中，越来越多地大量地用到铝合金型材，如铝合金门窗，玻璃幕墙等，铝型材的生产是采用挤压工艺成型的。在挤压过程中，挤压模具处于高温状态下工作，温度达到４５０℃以上，并且... Role of Rare Earth Elements in Sulfur Nitrocarburizing of Die Steel Nie Xueyuan, Hu Zhengqian, Chen Siwei, Wang Xiaoxia Wuhan University of Technology 1 Introduction In the construction industry, aluminum alloy profiles such as aluminum alloy doors and windows and glass curtain wall are increasingly used in large quantities. Aluminum production is the use of extrusion molding process. In the extrusion process, the extrusion die in the high temperature state of work, the temperature reached 450 ℃ above, and ...