Low alloy steel 42CrMo with wear-resistant, corrosion-resistant or fatigue resistant coatings, commonly used for thermal spraying

42CrMo alloy powder is a high-performance low-alloy steel powder designed specifically for thermal spraying (HVOF/HVAF, plasma spraying) processes. This powder has excellent hardness, wear resistance, and fatigue resistance, and is suitable for surface strengthening, repair, and corrosion protection of industrial components.

Product parameters and details

Parameter specifications/values

Chemical composition C: 0.38~0.45%,  Cr: 0.9~1.2%, Mo: 0.15~0.3%, Mn: 0.5~0.8%, Si: 0.15~0.4%, Fe:  margin
Powder shape with high sphericity (prepared by aerosolization, good flowability)
Particle size distribution 15-53 μ m (customizable)
Loose density~4.5-5.2 g/cm ³
Liquidity ≤ 15 s/50g (Hall current meter)
Hardness (spray state) HRC 30-50 (can be strengthened by subsequent heat treatment)
Applicable processes include HVOF/HVAF, plasma spraying, and cold spraying

Product advantages

✅  High bonding strength - Supersonic spraying (HVOF) can obtain dense coatings with a bonding strength of ≥ 70 MPa.
✅  Excellent wear resistance - suitable for high load wear conditions, such as repairing rollers, gears, and shafts.
✅  Good toughness - more impact resistant than hard alloys such as WC Co, suitable for dynamic load components.
✅  Cost effectiveness - Compared to cobalt based or nickel based alloys, it is more economical and suitable for large-scale industrial applications.
Applicable industries: steel, mining, energy, aerospace, automotive manufacturing, etc.

advantage:

High hardness (HRC 20-30, depending on heat treatment) and wear resistance, suitable for wear conditions such as shaft and gear repair.
The addition of molybdenum (Mo) and chromium (Cr) enhances fatigue resistance and corrosion resistance, and can be used in corrosion wear composite environments.
The low-temperature and high-speed characteristics of supersonic spraying (compared to plasma spraying) can reduce oxidation and preserve powder properties.

Recommended supporting technology

HVOF spray parameters reference:
Fuel: Kerosene or Hydrogen
Oxygen flow rate:~ 800 L/min
Spray distance: 150-250 mm
Powder delivery rate: 30-50 g/min

Typical Uses

1. Roll repair and strengthening
Roll repair: Wear resistant layer on the surface of steel industry rolls to extend their service life.
2. Hydraulic piston rod protection
Hydraulic rod coating: Anti corrosion and anti-wear properties for hydraulic rods in construction machinery.
3. Repair of gears and transmission components
Gear repair: Gear tooth surface strengthening for wind power and mining machinery.
4. High temperature resistant coating for engine components
Engine components: internal combustion engine piston rings, valve stems, etc.