两种铝挤压用模具钢的组织与性能研究

The comparative study of microstructure and properties of two die steels used for aluminum extrusion

摘要:

为了找到一种简易可行的方法对模具钢材质量进行管控，通过金相组织观察、洛氏硬度试验、断口冲击试验及扫描电子显微分析，对两种铝挤压用模具钢的组织与性能进行了对比研究．结果表明：晶界脆性相和钢材原始组织不均匀是造成钢材韧性差的主要原因，冲击韧性测试能直观的反映钢材性能，可以作为钢材性能检测的重要指标．

Abstract:

In order to find a simple and feasible method to control the quality of die steel, optical microscopy (OM) observation, rockwell hardnes test, fracture impact test and scanning electronic microstructure (SEM) analysis were used to study of microstructure and properties of two die steels for aluminum extrusion. The results show that the brittle phase on the grain boundaries and the inhomogeneous original structure of the steel are the main reasons for the poor toughness of the steel. The impact toughness test can directly reflect the performance of the steel and can be used as an important index for the selection of the steel.