合金元素钼含量对热铸模具钢组织和力学性能的影响

Effects of Mo Content on Microstructure and Mechanical Properties of Die Steel

以热铸模具钢为研究对象,分析了合金元素钼的含量对模具钢组织和力学性能的影响。结果表明,当钼含量为3.2%时,热铸模具钢的磨损表面存在着剥落区和未剥落区两部分。在磨损表面的剥落区域存在着大量氧化物,热铸模具钢中的钼含量和回火温度对其磨损率有重要影响。当回火温度较低时,合金元素钼含量对热铸模具钢硬度的影响较为明显;当回火温度较高时,合金元素钼含量对热铸模具钢的硬度影响较小。

Taking die steel as research object,the effects of Mo content on the microstructure and mechanical properties of die steel were investigated. The results show that there are two areas which can be divided into chipping area and unchipping area when 3.2% Mo is added. There are a lot of oxide materials in the wear area. The wear rate is influenced by Mo content and tempering temperatures of die steel. The Mo contents have more effects on the hardness of the die steel when the die steel is tempered at low temperature. The Mo content has less effect on the hardness of die steel when temper temperature is higher.