水韧处理对TiC基高锰钢结合金组织与性能的影响

系统研究了水韧处理对TiC基高锰钢结合金力学性能的影响,并通过分析合金在处理前后显微组织结构和微区成分的变化阐述了其中的内在关系.经过1 050℃×6h水韧处理后,真空烧结试样的抗弯强度和冲击韧性分别提高154.6%和125.3%;对低压烧结试样则分别提高61.81%和45.38%;对真空烧结+低压烧结试样也分别提高65.59%和32.90%.研究结果表明,水韧处理能够显著提高烧结态TiC基高锰钢结合金的抗弯强度和冲击韧性.因此,对烧结态TiC基钢结合金进行水韧处理或者高温成分均匀化热处理十分必要,有利于充分发挥其性能潜力.

Effect of Water Toughening Treatment on Microstructure and Properties of High Manganese Steel Bonded TiC

The effect of water toughening treatment on mechanical properties of high manganese steel bonded TiC hard alloy was systemically investigated, and the microstructure and element distribution of the alloy before and after the treatment were also evaluated by SEM and EDS in order to understand the internal relationship with its properties. The bending strength and impact toughness of high manganese steel bonded TiC hard alloy by normal vacuum sintering were increased by 154.6% and 125.3%, but those of low pressure sintering specimens were increased by 61.81% and 45.38%, and 65.59% and 32.90% for vacuum and low pressure sintering specimens, respectively. The results revealed that water toughening treatment could effectively improve the bending strength and impact toughness of the steel bond hard alloy. As-sintered steel-bonded TiC hard alloy should be heating treated by water toughening treatment or high temperature homogenizing treatment for better mechanical properties.