Preparation method for tungsten-nickel alloy with abrasion-resistant and corrosion-resistant coating

[0028] Prepare mixed powder according to the following weight components:

[0029] Tungsten carbide, 90.1%, Fischer particle size 0.8-1μm;

[0030] Nickel powder, 5%, Fischer particle size 0.5-1.0μm;

[0031] Chromium carbide, balance.

[0032] The mixed powder with the above ratio is wet-milled; the ball milling time is controlled in sections; firstly, the carbide powder and the additive chromium carbide are added to the ball mill barrel for wet milling for 12 hours, and then nickel powder is added for wet milling for 14 hours.

[0033] The ball milled mixture slurry was dried.

[0034] The dry mix is ​​pressed into compacts of the desired shape.

[0035] The pressed product is sintered at high temperature in a sintering furnace, the sintering temperature is 1450°C, the holding time is 70-90min, and the sintering pressure is 4.5Mpa to obtain a tungsten-nickel alloy matrix.

[0036] Substrate pretreatment. The substrate pretreatment may be followed by grinding and polishing,

[0040] Prepare mixed powder according to the following weight components:

[0041] Tungsten carbide, 92.8%, Fischer particle size 0.8-1μm;

[0042] Nickel powder, 6%, Fischer particle size 0.5-1.0μm;

[0043] Chromium carbide, balance.

[0044] The mixed powder with the above ratio is wet-milled; the ball milling time is controlled in sections; firstly, the carbide powder and the additive chromium carbide are added to the ball mill barrel for wet milling for 16 hours, and then nickel powder is added for wet milling for 18 hours.

[0045] The ball milled mixture slurry was dried.

[0046] The dry mix is ​​pressed into compacts of the desired shape.

[0047] The pressed product was sintered at high temperature in a sintering furnace, the sintering temperature was 1470°C, the holding time was 90min, and the sintering pressure was 5.0Mpa to obtain a tungsten-nickel alloy matrix.

[0048] Prepare cladding metal powder according to the following weight percentage: Zr 15%, Ni 8%, Si