【摘要】 以TiC为硬质相，Fe-Mo-Cr合金粉为主要黏结剂，采用粉末冶金工艺制备了TiC含量50%的高锰钢钢结硬质合金，研究了烧结温度对合金组织与性能的影响。组织观察表明，合金组织由黑芯-灰环颗粒和黏结相两种结构组成。随着烧结温度从1 390°C升高至1 470°C,TiC颗粒缓慢长大并分布均匀，颗粒形状逐渐球化。力学性能表明，随着烧结温度升高，合金硬度、横向断裂强度（烧结态/热处理态）和冲击韧性先增加后减小，在1 450°C达到最大值，分别为HRC63.6、1 546 MPa/2 342 MPa和12.3J/cm~2；其后，合金硬度、横向断裂强度和冲击韧性均降低。更多还原

【Abstract】 High manganese steel-bonded carbide with TiC content of 50% was prepared by powder metallurgy process by using TiC as hard phase and Fe-Mo-Cr alloy powder as main binder, and the effects of sintering temperature on the microstructure and properties of the alloys were studied. Microstructure observation shows that the microstructure of the alloy consists of two structures: black-core gray-rim particles and binder phase. With the sintering temperature increasing from 1 390 °C to 1 470 °C, the TiC particles grow; their distribution becomes evenly; the shapes become round gradually.Mechanical properties show that the hardness, transverse rupture strength(in the as-sintered state and as-heat treated state),and impact toughness of the alloy increase firstly and then decrease, reaching maximum values of HRC63.6, 1 546 MPa/2 342 MPa, and 12.3 J/cm~2 respectively at 1 450 °C. Subsequently, the hardness, transverse rupture strength, and impact toughness of the alloy decrease gradually.更多还原