Flux-cored welding wires.
Flux-cored welding wires PP-Np-80X20R3T.
Flux-cored welding wires PP-Np-80X20R3T consists of a metal shell and filler powder. The old designation of the wire is PP-AN170. The main parameters of PP-Np-80X20R3T wire, which are recommended by GOST 26101-84:
- Construction: tubular with edge overlap (H)*.
- Surfacing method: surfacing without additional protection – self-shielding wire (C).
- Wire diameter, mm: 3.2.
*In parentheses are the symbols used in the conventional marking of flux-cored wire.
The mode of firing the flux cored wire (carried out in the event of the appearance of pores during control surfacing):
- firing temperature – 150-180 °C;
- heating at a rate of up to 100 °C/h – exposure for at least 5 hours – air cooling.
Peculiarities of using PP-Np-80X20R3T powder coating wire:
- preferred wide-layer surfacing with increased wire projection (60-70 mm);
- a network of small cracks during surfacing is allowed;
- surfacing is not recommended in more than two layers with a thickness of one layer up to 5 mm without taking into account the penetration.
Field of application of the PP-Np-80X20R3T powder surfacing wire:
Surfacing of parts subject to intensive abrasive wear and gas-abrasive wear. Plating of disc valves of blast furnaces, slurry pumps, ploughshares, plows, blades of bulldozers and graders, bucket teeth of excavators, mixer blades, impellers, pump castings.
Flux-cored welding wires PP-Нп-25Х5ФМС.
The flux-cored welding wires PP-Нп-25Х5ФМС consists of a metal shell and filler powder. The old designation of the wire is PP-25X5FMS. The main parameters of PP-Np-25X5FMS wire recommended by GOST 26101-84:
- Construction: tubular with overlapping edges (H)
- Method of surfacing: surfacing under flux (F)
- Wire diameter, mm: 3.6.
* The symbols used in the conventional marking of flux-cored wire are indicated in parentheses.
Flux wire firing mode (performed in the event of pores appearing during control surfacing):
- firing temperature – 240-270 °C;
- heating at a rate of up to 100 °C/h – exposure for at least 5 hours – air cooling.
Field of application of PP-Np-25Х5ФМС powder welding wire: welding of hot cutting knives, hot stamping dies, press tools, hot rolling rolls.
Flux-cored welding wires PP-Np-35В9Х3СФ.
Flux-cored welding wires PP-Np-35В9Х3СФ consists of a metal shell and filler powder. The old designation of the wire is PP-3Х2В8. The main parameters of PP-Np-35В9Х3SF wire recommended by GOST 26101-84:
- Construction: tubular with edge overlap (H)*
- Method of surfacing: surfacing under flux (F)
- Wire diameter, mm: 3.6.
* The symbols used in the conventional marking of flux-cored wire are indicated in parentheses. Flux wire firing mode (performed in the event of pores appearing during control surfacing):
- firing temperature – 240-270 °C;
- heating at a rate of up to 100 °C/h – exposure for at least 5 hours – air cooling.
Scope of application of PP-Np-35V9X3SF powder coating wire. Surfacing of parts working under conditions of thermal fatigue and high specific pressures. Surfacing of rolls for hot rolling of pipes and grades, knives for hot cutting of metal, strikers of hammers, rollers of pulling winders.
Flux-cored welding wires PP-Np-250X10B8S2T.
Flux-cored welding wires PP-Np-250X10B8S2T consists of a metal shell and filler powder. The old designation of the wire is PP-AN135. The main parameters of PP-Np-250X10B8S2T wire, recommended by GOST 26101-84:
- Construction: tubular with edge overlap (H)*
- Surfacing method: surfacing without additional protection – self-shielding wire (C)
- Wire diameter, mm: 3.2.
* In parentheses are the symbols used in the conventional designation of flux-cored wire.
The mode of firing the flux cored wire (carried out in the event of the appearance of pores during control surfacing):
- firing temperature – 150-180 °C;
- heating at a rate of up to 100 °C/h – exposure for at least 5 hours – air cooling.
Peculiarities of using PP-Np-250X10B8S2T powder coating wire:
- Wide-layer surfacing with increased wire protrusion (60-70 mm) is preferable.
- A network of small cracks during surfacing is allowed.
- Surfacing is allowed in layers with a total thickness of up to 25 mm.
The field of application of the powder coating wire PP-Np-250X10B8S2T. Surfacing of parts operating under conditions of abrasive wear with shock loads, gas-abrasive wear.
Flux-cored welding wires PP-Нп-200Х15С1ГРТ.
The PP-Np-200X15S1GRT powder welding wire consists of a metal shell and filler powder.
The old designation of the wire is PP-AN125. The main parameters of PP-Np-200X15S1GRT wire, which are recommended by GOST 26101-84:
- Construction: tubular with overlapping edges (H)*;
- Surfacing method: surfacing without additional protection – self-shielding wire (C);
- Wire diameter: 3.2 mm.
* The symbols used in the conventional marking of flux-cored wire are indicated in parentheses.
The mode of firing the flux cored wire (carried out in the event of the appearance of pores during control surfacing):
firing temperature – 150-180 °C;
heating at a rate of up to 100 °C/h – exposure for at least 5 hours – air cooling.
Features of the application of PP-Np-200X15S1GRT powder welding wire:
- Wide-layer surfacing with increased wire protrusion (60-70 mm) is preferable.
- A network of small cracks during surfacing is allowed.
- Surfacing is not recommended in more than two layers with a thickness of one layer up to 5 mm without taking into account the penetration.
Scope of application of PP-Np-200X15S1GRT powder welding wire. Surfacing of parts subject to abrasive wear with moderate shock loads.
The main technical characteristics of brands of powder coating wires.
| Name of the material | C, % | Cr, % | Mn, % | Si, % | Ti, % | B, % | S, % | P, % | Mo, % | V, % | W, % | Nb, % | Hardness |
| PP-Np-80X20R3T | 0,5-1,2 | 18-23 | ≤ 1,0 | ≤ 1,0 | 0,1-0,8 | 2,7-4,0 | ≤ 0,04 | ≤ 0,04 | 59,0-63,0 HRC | ||||
| PP-Np-25X5FMS | 0,20-0,31 | 4,7-6,0 | 0,4-0,9 | 0,8-1,3 | ≤ 0,04 | ≤ 0,04 | 1,0-1,5 | 0,3-0,6 | 41,5-51,5 HRC | ||||
| PP-Np-35V9X3SF | 0,27-0,40 | 2,2-3,5 | 0,6-1,1 | 0,2-1,0 | ≤ 0,04 | ≤ 0,04 | 0,2-0,5 | 8,0-11,0 | 42,5-54,5 HRC | ||||
| PP-Np-250X10B8S2T | 2,3-3,0 | 8-11 | 1,5-2,5 | 0,5-1,2 | ≤ 0,04 | ≤ 0,04 | 6-9 | 51,5-59,0 HRC | |||||
| PP-Np-200X15S1GRT | 1,5-2,2 | 14-20 | 0,8-1,5 | 1,0-2,0 | 0,2-0,8 | 0,5-0,8 | ≤ 0,04 | ≤ 0,04 | 47,5-59,0 HRC |