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| Effect of sintering temperature on the mechanics and friction properties of
WNiCoFe alloy powder used for cutting tools |
| JIANG Qing-gang1，GE Xin-feng2 |
| 1School of Mechanical and Electrical Engineering，Hebi Polytechnic，Hebi 458030，China；
2Center of Engineering Training & Technology，Xuchang University，Xuchang 461000，China |
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Abstract In order to improve the wear resistance of WNiCoFe alloy for cutting tools，the powder of WNiCoFe alloy
was prepared by electrolysis，and the influence of sintering temperature on its physical mechanics and friction
properties was studied. The results show that in addition to Fe，diffraction peaks corresponding to Co3Fe7，Fe19Ni
are also formed in the WNiCoFe alloy powder prepared by electrolysis. The powder of WNiCoFe alloy forms agglomerated
grains with spherical characteristics，and the average particle size is 16.1 μm. With the increase of sintering
temperature，the microstructure compactness and hardness of the alloy powder increases first and then decreases，
and the maximum hardness of 108.6HRB is obtained at 800 ℃. The sample density reaches the maximum
value of 95.4% at 850 ℃. With the increase of sintering temperature，the bending strength of alloy powder increases
first and then decreases，and the maximum bending strength of 1 658 MPa is obtained at 800 ℃. With the increasing
of the sintering temperature，the wear quality decreases，indicating that the wear resistance is improved.
With the increase of sintering temperature to 800 ℃，the microstructure density of the sample is small，and many
micropores are formed，which lead to the brittle fracture of intergranular.
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Received: 05 August 2019
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2020, Vol. 30 
