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How To Prepare Tungsten Nickel Alloy?

2024-01-05 18:00:06

Tungsten-nickel alloys are widely used in electronics, medical equipment, auto parts, aerospace industry, and daily hardware parts because of their high strength, high hardness, good wear resistance and corrosion resistance. So, how to prepare high-quality tungsten-nickel alloy materials?

tungsten nickel alloy bar

A preparation method of a tungsten-nickel alloy material includes the steps of batching, ball milling, drying, compression molding, sintering, continuous fiber laser cladding and remelting.

(1) Ingredients: Prepare mixed powder tungsten carbide according to the following weight components, 90.1%-92.8%, Fisher particle size 0.8-1μm; Nickel powder, 5%-6%, Fisher particle size 0.5-1.0μm; chromium carbide, remaining the amount.

(2) Ball milling: Wet mill the mixed powder in the above proportion, and control the time of ball milling in stages. First, add carbide powder and additive chromium carbide to the ball mill cylinder for wet milling for 12-16 hours, and then add nickel powder for wet milling 14- 18 hours.

(3) Drying: Dry the mixed material slurry after ball milling.

(4) Press molding: press the dry mixture into a pressed product of the desired shape.

(5) Sintering: Place the pressed product in a sintering furnace for high-temperature sintering. The sintering temperature is 1450-1470°C, the holding time is 70-90min, and the sintering pressure is 4.5-5.0Mpa to obtain a tungsten nickel alloy matrix.

(6) Prepare the cladding metal powder according to the following weight percentages: 10%≤Zr≤15%, 2%≤Ni≤8%, 1%≤Si≤2%, 1%≤B≤5%, 2%≤ C≤6%, tungsten powder is the balance, ball milling and mixing, the particle size range of metal powder is 60-100 microns.

(7) Use a continuous fiber laser, set the cladding process, and use synchronous powder feeding to perform multi-pass cladding on the metal powder in step (6), cool to room temperature, and prepare an alloy coating on the tungsten-nickel alloy substrate .

(8) Use a continuous fiber laser, set a remelting process, perform laser surface remelting on the alloy coating prepared in step (7), and cool to room temperature to obtain a tungsten nickel alloy material.

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