Hardfacing powders are manufactured to have the precise size, shape, and chemistry required for optimal thermal spraying characteristics.
As a thermal spray powder manufacturer, our powders are available in a wide variety of alloys to give the workpiece desired finished qualities - whether it is good machinability, abrasion resistance, corrosion resistance, ductility, hardness, or high strength.
Hardfacing Process
Hardfacing or surface coating is a process of spraying or welding metallic powders onto a workpiece or substrate to give it a specific hardness, wear resistance, or corrosion resistance. This process requires the appropriate alloy and particle size distribution for a specific deposition technology. Appropriately selected powders yield the best properties and manufacturing efficiencies.
Hardfacing Applications
Hardfacing powders are used in a variety of thermal spray coating applications including Plasma Transfer Arc (PTA), Spray and Fuse, High Velocity Oxy-Fuel (HVOF), Laser Additive and Puddle Torch technologies. Typically, these applications require a specific hardness, morphology and particle size to achieve desired final properties of the coated substrate or workpiece.
Typical Water Atomized Thermal Spray powders include the following grades:
| Hardfacing Powder Alloy |
Characteristics |
| PF20 |
Good machinability. High impact resistance. High ductility. High tensile strength. Deposits can be hand finished. Recommended for repair of cast iron parts. |
| PF25 |
Deposit has good machinability and impact resistance, slightly harder than PF20. Excellent corrosion resistance. May be used for repairs to cast iron parts or overlay where nickel base alloy is required. |
| PF35 |
For coatings requiring intermediate hardness, excellent machinability and resistance to corrosion, heat and cracking. Use on shafts, sleeves, and wear surfaces. |
| PF40 |
High build up capability. Good impact and abrasion resistance. Excellent machinability. Suggested for use where precision finish is required. |
PF50
|
Intermediate hardness. Excellent weldability and crack resistance. Use on polish rods, liners, shafts, valve gates, and coupling. |
| PF55 |
Excellent abrasion and corrosion resistance. Good hardness. Ideally suited for boiler surface coating applications. |
| PF60 |
Non-machinable. Finish surface by grinding. Excellent abrasion and corrosion resistance. High hardness. Excellent weldability. Use on couplings, shafts, polish rods, plungers, and valves. |
| PI600 |
Excellent machinability. Work hardens in service. Good wear and corrosion resistance. Use on motor shafts and pump sleeves. |
| 316L |
Produces corrosion resistant work hardenable finish. Excellent machinability. |
In addition to these applications typically considered “Hardfacing”, we manufacture the following alloys as well as
custom atomized powders for special powder coating applications.
Thermal Spray Powder for Aerospace
We supply several Products indirectly for the aerospace industry. Many of our products are key constituents of blends or some of the original materials used in aerospace thermal spray metallic coatings. We are always happy to support aerospace customers.
Thermal Spray Powder for Oil and Gas, and Agriculture
Equipment used in oil and gas, heavy industry, and agriculture must be able to withstand high levels of corrosion, wear, or heat. Drill rods, shafts, tubes, couplings, cutter bars, augers, cylinders, and related components are especially vulnerable to the effects of wear and corrosion and must be treated specially to maximize life.
To meet this challenge, our metallurgists have engineered powders designed specifically for these applications, which are often referred to as “Hardfacing”.
Typical Hardfacing Powder Compositions
| Alloy |
C |
CR |
FE |
NI |
B |
SI |
CU |
MO |
CO |
RC.
Hardness |
Melt
Temp (Fº)
|
| PF20 |
.03 |
- |
1.5 |
BAL |
1.5 |
2.5 |
- |
- |
- |
12 - 20 |
2000 |
| PF25 |
.06 |
- |
1.5 |
BAL |
1.5 |
3.5 |
- |
- |
- |
20 - 30 |
1975 |
| PF35 |
.05 |
10.5 |
2.0 |
BAL |
2.0 |
3.3 |
- |
- |
- |
32 - 40 |
1925 |
| PF40 |
.30 |
7.5 |
1.5 |
BAL |
1.4 |
4.0 |
- |
- |
- |
40 - 48 |
1925 |
| PF50 |
.65 |
14.0 |
4.2 |
BAL |
2.8 |
3.8 |
- |
- |
- |
48 - 54 |
1900 |
| PF55 |
.65 |
15.0 |
4.5 |
BAL |
3.3 |
4.0 |
3.5 |
3.5 |
- |
50 - 60 |
1900
|
| PF60 |
.90 |
16.5 |
4.5 |
BAL |
3.3 |
4.3 |
- |
- |
- |
56 - 62 |
1900 |
| 316L |
.03 |
17.0 |
BAL |
12.0 |
- |
0.8 |
- |
2.5 |
- |
Rb78 |
2525 |
| 80/20 |
- |
20.0 |
- |
80.0 |
- |
- |
- |
- |
- |
- |
- |
| *HAC |
.05 |
15.5 |
8.0 |
BAL |
- |
0.8 |
- |
16.0 |
- |
- |
- |
| *I600 |
.02 |
14.0 |
10.0 |
BAL |
- |
1.0 |
- |
- |
- |
Rb74 |
2600 |
| *M400 |
.02 |
- |
- |
66.5 |
- |
0.5 |
32.5 |
- |
- |
- |
- |
*HAC is AMETEK’s equivalent to HASTELLOY® C. HASTELLOY® is a Cabot Corporation trademarked product. I600 is AMETEK’s equivalent to INCONEL® 600.
INCONEL® is an International Nickel Company, Inc. trademarked product. M400 is AMETEK’s equivalent to MONEL® 400. MONEL® is an International Nickel Company, Inc. trademarked product.