23.12/2022
Merry Christmas and Happy New Year 2023!
27.06/2022
POLEMA’s QMS confirmed its compliance with ISO 9001:20015
POLEMA JSC confirmed the compliance of the current QMS with the requirements of ISO 9001:2015.
03.06/2011
Progressive materials for multi-functional vacuum coatings
Application fields of materials for multi-functional vacuum coatings, characteristics of sputtering targets and evaporable sources used for technologies of physical deposition of hardening, protective, decorative and light-reflecting coatings, resistive, switching and transparent electro conductive films.
24.05/2011
Molybdenum and tungsten products for production of leucosapphires
POLEMA JSC is the leading global manufacturer of chromium, molybdenum, tungsten products, metal powders and composite materials.
Corrosion-resistant steels and alloys
partsPowder AP-FeCr13Application
Powders are produced by means of molten metal gas spraying, high-pressure water spraying and calcium hydride reduction of mixed metal oxides.
Gas-sprayed powders are characterized by spherical particles and good fluidity. These are applied for deposition of corrosion- and wear-resistant coatings onto machines and equipment parts using methods of plasma-jet hard-facing and laser building-up, gas-dynamic and plasma spraying. Coating material selection is determined by the purpose of corrosion protection and achievement of specific properties for surfaces of machine and equipment parts, as well as by the method of hardsurfacing. For example, AP-FeCr19Ni9Si5Mo4NV powder is used for wear-resistant coatings operating in aggressive environments at elevated temperatures, while AP-FeCr19Ni11Mo2 is used for anti-friction and corrosion-resistant coatings.
Water-reduced and water-sprayed powders are characterized by irregular or round shape of particles. These are applied for production of permeable materials (filters) and corrosion-resistant structural parts. AP-FeCr18Ni9MoCuSi water-sprayed powder was specifically developed for molten polyester resin filtering.
Reduced nichrome powder Ni80Cr20 of 40-100 microns fraction is also applied for plasma coatings in aircraft motor industry.
A separate group of stainless steel powders is composed to be used for build-up welding of erosion-resistant coatings onto power equipment valving parts. These innovative powder materials were specifically developed in lieu of the electrodes being used as coating materials in valving production and repair.
Powder grades and properties
| Name, grade, base grains | Nominal composition % | ||||||
| Fe | Cr | Ni | Si | Mo | Al | Other | |
| Ni Al5 powder AP-NiAl5 alloy gas-sprayed -40, 11-53, 40-100, 40-125, 45-106 microns | ≤1.0 | - | base | - | - | 5 | C≤0.05 Si, Fe, Mn≤1 each |
| Stainless steel powder AP-FeCr18Ni9 gas-sprayed -40, 20-63, 40-100, 90-160 microns | base | 18 | 9 | - | - | - | C ≤0.12 |
|
Stainless steel powder RP-FeCr18Ni9Ti reduced -56 packed density 2.2-3.0 g/cm3 -160 packed density 2.0-2.6 g/cm3 -280 packed density 1.7-2.6 g/cm3 |
base | 18 | 9 | - | - | - |
C0.08 Ti0.8 O≤0.35 S≤0.02 Ca≤0.15
|
|
Stainless steel powder RP-FeCr18Ni15 reduced -56 packed density 1.9-2.5 g/cm3 -160 packed density 1.8-2.5 (3.0) g/cm3 -280 packed density 1.7-2.5 g/cm3 |
base | 18 | 15 | - | - | - | C≤0.08 O≤0.30 S≤0.015 Ca≤0.15 |
|
Stainless steel powder RP-FeCr17Ni2 reduced -56 packed density 2.2-3.0 g/cm3 -160 packed density 2.0-2.6 g/cm3 -280 packed density 1.7-2.6 g/cm3 |
base | 17 | 2 | - | - | - | O≤0.35 S≤0.02 Ca≤0.20 C0.12 |
|
Stainless steel powder RP-FeCr23Ni18 reduced -56 packed density 2.2-3.0 g/cm3 -160 packed density 2.0-2.6 g/cm3 -280 packed density 1.7-2.6 g/cm3 |
base | 23 | 18 | - | - | - | C≤0.08 O≤0.30 S≤0.02 Ca≤0.15 |
|
Stainless steel powder RP-FeCr13Mo2 reduced -160 packed density 2.1-2.45 g/cm3 -280 packed density 2.0-2.6 g/cm3 |
base | 13 | - | - | 2 | - | C≤0.08 O≤0.50 S≤0.02 Ca≤0.20 |
|
Nichrome powder Ni80Cr20 AP-Cr20Ni80 (Nitrogen atomization) AP-Cr20Ni80 (Water atomization) -40, 20-63, 40-100, 80-160 microns |
≤1.0 | 20.5 | base | - | - | - | Si≤0.5 O≤0.05 Mn≤0.1 each |
|
Nichrome powder Ni80Cr20 RP-Cr20Ni80 reduced -160 packed density 2.0-2.6 g/cm3 -280 packed density 1.7-2.6 g/cm3 |
- | 20 | base | - | - | - | C≤0.06 O≤0.30 S≤0.01 Ca≤0.20 |
|
Nichrome powder Ni60Cr40 RP-Cr40Ni60 reduced |
- | 40 | base | - | - | - | C≤0.06 S≤0.02 Ca≤0.20 |
|
Powder of FeCr30 alloy RP-FeCr30 reduced -56 packed density 2.2-3.0 g/cm3 -160 packed density 2.0-2.6 g/cm3 -280 packed density 1.7-2.6 g/cm3 |
base | 30 | ≤0.30 | - | - | - | C≤0.30 O≤0.30 S≤0.01 Ca≤0.20 |
|
Stainless steel powder AP-FeCr17Ni12Mo3 gas-sprayed 11-53, 45-106 microns |
base | 17 | 12 | - | 2.5 | <0.6 | Mn≤0.8 C≤0.1 |
|
Stainless steel powder AP-FeCr19Ni9Si5Mo4NV gas-sprayed 80-200 microns |
base | 19 | 9 | - | 4.5 | - | N, Si, Mn, V C≤0,08 |
|
Stainless steel powder AP-FeCr19Ni11Mo2 gas-sprayed -40, 40-100, 80-400, 100-280 microns |
base | 19 | 11 | - | 2.5 | - | C≤0.08 O≤0.05 Mn1.5 |
|
Stainless steel powder AP-FeCr20Ni2 gas-sprayed -40, 20-63, 40-100, 80-200 microns |
base | 13 | 2.2 | - | - | - | Mn0.8 C0.2 |
|
Stainless steel powder AP-FeCr13 gas-sprayed -40, 20-63, 40-100, 80-200 microns |
base | 13 | - | - | - | - | C0.3 Ni≤0.6 Si≤0.8 Mn≤0.8 Ti≤0.2 Cu≤0.3 S≤0.025 P≤0.03 |
|
Stainless steel powder AP-FeCr18Ni9MoCuSi water-sprayed 630-2000, 630-2500 microns |
base | 18 | 9.5 | 0.8 | 0.9 | - | Cu0.9 C≤0.12 O≤ 0.45 |
Application
Erosion-resistant alloyed powders AP-FeCr17Ni8Si6Mn (ZN-6L) and AP-FeCr18Ni9Mo5Si5Mn4Nb (ZN-12M) were developed for high-performance and high-quality plasma-jet hard-facing of wear-resistant coatings onto sealing surfaces of power equipment valving parts in lieu of the coating electrodes well-known in the valving industry. Powder grades designation in brackets are the grades of coating electrodes according to GOST 10051 used for build-up welding of layers of similar composition.
Innovative powdery coating materials were developed jointly with State Scientific Center of the Russian Federation – Open Joint-Stock Company “Research and Production Association CNIITMASH”, being now manufactured pursuant to the technical specifications approved by the Institute of Welding and Control (State Research Center).
Powders are characterized by spherical particles and good fluidity.
Post-heat treatment hardness of weld metal:
AP-FeCr17Ni8Si6Mn (ZN-6L) ………………30-39 HRC;
AP-FeCr17Ni8Si6Mn (ZN-12M) ……40-51 HRC.
Build-up welding is performed with pre-heating of parts at 350 °C and subsequent heat treatment following the build-up welding:
for austenic steels – tempering at 860 °C, 2 hours, with retarded cooling;
for carbon steels – tempering at 640 °C, 2 hours, with retarded cooling.
Powders developed for special application:
| Name, grade, base grains | Nominal composition % | ||||||
| Fe | Cr | Ni | Si | Mo | Al | Other | |
| AP-FeCr17Ni8Si6Mn (ZN-6L) gas-sprayed powders 63-125 microns | base | 17 | 8 | 6 | - | - | C0.08 Mn1 Co≤0.2 S≤0.025 P≤0.03 O≤0.08 N≤0.09 |
| AP-FeCr18Ni9Mo5Si5Mn4Nb (ZN-12M) gas-sprayed powders 63-125 microns | base | 18 | 9 | 5 | 5 | - | C0.10 Mn4 Nb1 Co≤0.2 S≤0.025 P≤0.03 O≤0.08 N≤0.09 |
