Study on the sintered characteristics and properties of nanostructured WC-15 wt% (Fe-Ni-Co) and WC-15 wt% Co hard metal alloys
Study on the sintered characteristics and properties of nanostructured WC-15 wt% (Fe-Ni-Co) and WC-15 wt% Co hard metal alloys
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DOI：
10.1016/j.jallcom.2015.07.119
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发表时间：
2015-11-15
影响因子：
6.2
通讯作者：
Huang, Kuo-Tsung
中科院分区：
文献类型：
--
作者：
Chang, Shih-Hsien;Chang, Ming-Hung;Huang, Kuo-Tsung
本工作通过研究四种不同的真空烧结温度（1250℃、1300℃、1350℃和1400℃）来确定纳米WC-15wt%（Fe-Ni-Co）和WC-15wt%Co烧结硬质合金的最佳工艺参数。实验结果表明，纳米WC-(Fe-Ni-Co)和WC-Co合金的最佳烧结温度分别为1300℃和1350℃1 h。烧结纳米WC-(Fe-Ni-Co)和WC-Co硬质合金表现出良好的连续性，分别为0.44和0.42；硬度提高至HRA 90.83和90.92；横向断裂强度（TRS）增加至2567.97和2860.08 MPa； K-IC 分别为 16.23 和 12.33 MPa root·m。尽管纳米WC-(Fe-Ni-Co)合金的TRS值略低，但它们表现出与纳米WC-Co材料相似的优异的断裂韧性(KIC)和硬度。值得注意的是，纳米WC-(Fe-Ni-Co)合金可以在较低温度下烧结，并且仍然保留其优异的机械性能。 (C) 2015 Elsevier B.V. 保留所有权利。
In this work, four different vacuum sintering temperatures (1250 degrees C, 1300 degrees C, 1350 degrees C and 1400 degrees C) were studied to determine the optimal process parameters of nano WC-15 wt% (Fe-Ni-Co) and WC-15 wt% Co sintered hard metal alloys. Experimental results showed that the optimal sintering temperatures for nano WC-(Fe-Ni-Co) and WC-Co alloys were 1300 degrees C and 1350 degrees C for 1 h, respectively. The sintered nano WC-(Fe-Ni-Co) and WC-Co hard metal alloys showed a good contiguity of 0.44 and 0.42; hardness was enhanced to HRA 90.83 and 90.92; the transverse rupture strength (TRS) increased to 2567.97 and 2860.08 MPa; and K-IC was 16.23 and 12.33 MPa root m, respectively. Although the nano WC-(Fe-Ni-Co) alloys possessed a slightly lower TRS value, they exhibited superior fracture toughness (KIC) and hardness similar to that of the nano WC-Co material. Significantly, nano WC-(Fe-Ni-Co) alloys could be sintered at a lower temperature and still retained their excellent mechanical properties. (C) 2015 Elsevier B.V. All rights reserved.