2. Analysis of results 2.1 The results show that the Fe-Ni-Cu-W alloy can be autoclaved and sintered at a lower temperature, and the sintered body has better impact resistance and a wider hardness range.
2.2 The change of the ratio of several main components has a great influence on the performance of the sintered body: the ratio of W, Fe and Ni components in the alloy formulation is increased, and the performance index of the sintered body is improved to some extent.
2.3 Introduce trace elements into the alloy to strengthen the carcass while reducing the wetting angle of the alloy and the diamond crystal, and improve the wettability of the alloy to the diamond crystal:
The introduction of Sn enhances the Cu matrix and interacts with the Ti element to improve the wettability of the diamond. However, the input of more than 10 wt% increases the brittleness tendency. The introduction of the Cr and Mn elements enhances the Fe matrix and improves the diamond. The infiltration of graphite powder can improve the formability of the metal powder, strengthen the Fe matrix, form a local reducing atmosphere, and activate the sintering. 2.4 The impact test of the No. 6 formula shows that the diamond input does not significantly reduce the strength index of the sintered body. It is inferred that the holding force of the alloy on the diamond crystal is not only the mechanical meshing effect, but also the chemical bonding force: the alloy infiltrates the diamond well and the elements such as Ti and W and the C atoms in the diamond interdifulate at the interface to form carbonization. The materials WC and TiC are the reasons for forming such a bond.
in conclusion
1. The principle of solid solution strengthening can be used as one of the guiding theories for designing the material of diamond saw blade.
2. Theoretical analysis and experiments prove that Fe-Ni-Cu-W alloy can be used as the material of the cutter head.
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