Description of WNiFe Balance Parts
WNiFe balance parts, also known as tungsten-nickel-iron balance parts, are components made from a specific alloy consisting of W, Ni, and Fe. WNiFe balance parts (W-Ni-Fe alloy parts) are special components made of W, Ni, and Fe. Known for their weight, they're widely used as balancing weights in various applications. The mix of metals can be adjusted to achieve the right balance of weight, strength, and rust resistance.
WNiFe balance parts are extremely dense (17.0-18.5g/cm³). While they can briefly handle extreme heat up to 1000-1200°C, for regular long-term use, they work best below 500-800°C to prevent damage from heat and wear.
Manufacturing process and key technologies of WNiFe balance parts
The powder metallurgy process
Raw material preparation:
Tungsten powder (FSSS 3-5μm) + nickel powder (＜1μm) + iron powder (＜1μm) three-dimensional powder mixing (time ≥6h, uniformity ＞99.5%).
Molding process:
Cold isostatic pressing (CIP): 200-300MPa molding, green density reaches 55-65% theoretical density.
Injection molding (MIM): used for complex shapes (such as curved counterweights), binder (PEG/PMMA) degreasing is the key.
Sintering technology:
Two-step sintering method:
Pre-sintering (800℃/H₂) to remove residual carbon → high temperature sintering (1500℃/H₂), density ＞18.2 g/cm³.
Post-treatment process
Heat treatment:
Quenching + aging (800℃/2h) to increase hardness (HV from 350→450).
Surface strengthening:
Chemical vapor deposition (CVD) TiN coating (thickness 2-5μm), wear resistance increased by 3 times.
Features of WNiFe balance parts
Composition: WNiFe balance parts typically consist of tungsten as the main component, with nickel and iron added to improve ductility, good corrosion resistance, and to achieve the desired density.
Density: The density of WNiFe balance parts can be adjusted by varying the composition, but they generally have a density that is significantly higher than many other metals.WNiFe counterweights have a high density of 17.0-18.5 g/cm³.
Electrical Conductivity: The electrical conductivity of WNiFe balance parts is moderate compared to pure metals, but can be improved by adjusting the composition. The electrical conductivity of WNiFe balancing components typically ranges from 8-12% IACS (International Annealed Copper Standard), equivalent to 5-7×10⁶ S/m.
Thermal Conductivity: WNiFe counterweights have great heat transfer ability, making them ideal for applications where cooling is important.
Workability: The added nickel and iron make these much easier to shape and machine than pure tungsten.
Corrosion Resistance: They hold up well against rust and corrosion, especially compared to pure tungsten, even in wet or harsh environments.
Applications of WNiFe balance parts
Aerospace
The vibration-dampening WNiFe alloys serve as balancing weights in the wings and engines of aircraft. They make air travel much safer and smoother by further decreasing vibrations and increasing flight stabilization.
Automotive Industry
In automobiles, the alloys are placed in flywheels and the crankshaft of the engines. The well-handled weight distribution increases the balance and control of the vehicle, contributing to a smoother drive.
Military Equipment
Weapons and ammunition also contain WNiFe alloys. These alloys are used as balancing weights in firearms, increasing the accuracy of shooters. Their high density allows them to be placed within the bullet, increasing the amount of penetration power the bullets have.
Sports Equipment
Most of the WNiFe alloys are used in golf clubs and tennis rackets. The weight distribution allows players using this sports equipment to perform better and have better control in games.
Specification of WNiFe balance parts
|
Tungsten heavy alloy |
W-Ni-Fe |
W-Ni-Cu |
|||||
|
Designation |
90W |
92.5W |
95W |
97W |
90Cu |
92.5Cu |
97Cu |
|
Density (g/cm3) |
17 |
17.6 |
18 |
18.5 |
17 |
18 |
18.5 |
|
Tensile Strength (MPa) |
820 |
780 |
820 |
840 |
750 |
650 |
550 |
|
Elongation (%) |
10 |
7 |
7 |
5 |
1.2 |
1 |
0.5 |
|
Hardness (HRC) |
25 |
26 |
27 |
28 |
24 |
27 |
28 |
|
Young's Modulus (GPa) |
310 |
320 |
340 |
365 |
270 |
300 |
320 |
|
Thermal expansion coefficients (10-6/K) |
4.61 |
4.62 |
4.6 |
4.5 |
5.6 |
4.4 |
4 |
|
Electrical conductivity (%) |
10 |
13 |
13 |
17 |
17 |
19 |
23 |
|
Thermal conductivity (W/m.K) |
80 |
90 |
93 |
95 |
110 |
120 |
125 |
Testing and Packing
FAQ for WNiFe balance parts
What is the delivery method?
A: Generally, we send cargo by UPS, DHL or FedEx. Also, we can send by sea to a seaport or by air to the closest airport.
Why is your product so cost-effective?
A: We cut out the middlemen in the end-to-end manufacturing process, and we obtain raw material directly from its source.
Do you do spot quality inspection or full inspection?
A: 100% full inspection for sure. All unqualified products are discarded.
How do you ensure your lead time?
A: From material preparation to machining and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.
What is the MOQ of WNiFe Balance Parts?
A: Depends on quantity; generally, no MOQ limit.
How to pay for it?
A: A bank transfer (T/T) will be acceptable.
What is the delivery time?
A: around 7-20 days, which depends on the quantity and production.
What kind of package is it?
A: Generally, we use a carton case or a plywood case with protective material inside to ensure the safety of the cargo.
What is the lead time?
A: From the order placed to cargo receiving will take around 10-25 days.
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