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摘要: 制备了含有不同质量分数WC增强颗粒（0%、1%、2%、3%、4%、5%、6%、7%、8%、9%及10%）的Fe-1.5Cu-1.8Ni-0.5Mo-1C粉末冶金复合材料，分析了WC质量分数对复合材料显微组织、硬度与耐磨性能的影响。结果表明，在Fe-1.5Cu-1.8Ni-0.5Mo-1C材料中添加适量的WC颗粒可以提升复合材料的性能，尤其是耐磨性能。当WC颗粒的质量分数在1%~2%时，材料具有较好的组织结构与力学性能，相对于不添加WC增强颗粒的材料，含质量分数1%与2% WC增强颗粒的材料硬度（HRB）分别提升了12.9%和14.3%，磨损量分别降低了50%和52.1%。Abstract: Fe-1.5Cu-1.8Ni-0.5Mo-1C powder metallurgy (P/M) composites added by WC reinforced particles in different mass fraction (0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%) were prepared. The effects of WC content on microstructures, hardness, and wear resistance of composites were analyzed. The results indicate that, WC reinforced particles can improve the mechanical properties of composites, especially the wear resistance. The specimen containing WC reinforced particles in the mass fraction of 1% to 2% show the better microstructures and mechanical properties. Compared with the specimens without WC particles, the hardness of composites containing 1% and 2% WC particles by mass is increased by 12.9% and 12.9%, respectively, and the abrasion loss is reduced by 50% and 52.1%, respectively.
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Key words:
- WC /
- particle reinforcement /
- wear resistance /
- hardness /
- microstructures
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图 1 含不同质量分数WC增强颗粒的Fe-1.5Cu-1.8Ni-0.5Mo-1C复合材料孔隙形貌：（a）0%；（b）1%；（c）2%；（d）3%；（e）4%；（f）5%；（g）6%；（h）7%；（i）8%；（j）9%；（k）10%
Figure 1. Pore morphology of specimens added by WC reinforced particles in different mass fraction: (a) 0%; (b) 1%; (c) 2%; (d) 3%; (e) 4%; (f) 5%;(g) 6%; (h) 7%; (i) 8%; (j) 9%; (k) 10%
图 2 含不同质量分数WC增强颗粒的Fe-1.5Cu-1.8Ni-0.5Mo-1C复合材料密度
Figure 2. Density of specimens added by WC reinforced particles in different mass fraction
图 3 含不同质量分数WC增强颗粒的Fe-1.5Cu-1.8Ni-0.5Mo-1C复合材料硬度
Figure 3. Hardness of specimens added by WC reinforced particles in different mass fraction
图 4 含不同质量分数WC增强颗粒的Fe-1.5Cu-1.8Ni-0.5Mo-1C复合材料磨损量
Figure 4. Abrasion loss of specimens added by WC reinforced particles in different mass fraction
表 1 试样成分配比（质量分数）
Table 1. Composition of specimens by mass
% 样品编号 Fe-1.5Cu-1.8Ni-0.5Mo-1C 润滑剂 WC 1# 99.5 0.5 0 2# 98.5 0.5 1 3# 97.5 0.5 2 4# 96.5 0.5 3 5# 95.5 0.5 4 6# 94.5 0.5 5 7# 93.5 0.5 6 8# 92.5 0.5 7 9# 91.5 0.5 8 10# 90.5 0.5 9 11# 89.5 0.5 10 
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表 2 试样烧结工艺
Table 2. Sintering process of specimens
烧结段 温度/℃ 时间/min 1 865 18 2 975 18 3 1110 18 4 1120 18 5 1115 18 7 冷却段 90
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