Base on orthogonal test and using engineering average effect analysis method,the best process parameters of sulphonitrocarburizing for the H13 steel hot extruding die was determined.

• 用正交试验和工程平均效应分析方法确定了H13钢铝型材热挤压模的工作面(俗称“窄缝面”)进行硫氮碳三元共渗的最佳工艺参数。