The hardness, compactness and bonding strength of iron-based alloy powder coating are equivalent to those of nickel-based alloy powder coating by adjusting the Ni and Cr contents of 18-8 or Cr 13 stainless steel and adding B and Si elements. The toughness of iron-based alloy powder coating replacing nickel-based alloy powder coating is lower than that of nickel-based alloy powder coating, and it has good wear resistance.

(1) carbon steel low alloy powder

This material is widely used. The strength and wear resistance of mechanical engineering materials are widely available and cheap. Generally, warm-working mechanical parts are used as hard surface coating of sliding surface to repair the size of worn parts. This material has a high melting point and is easy to form oxide coating holes by spraying.

(2) Fe-Cr-Si alloy powder

The sprayed alloy-like coating is bright and dense, and its hardness reaches 90HRB. Used to repair worn bronze and stainless steel parts, used to repair cavitation of stainless steel containers, and used as surface coating of pump shaft, mechanical sealing surface or motor shaft.

(3) Fe-Cr-B-Si alloy powder

This series of alloys have good wear resistance, pressure resistance and toughness, and are easy to process. They are used for parts such as the shaft pump surface of wear-resistant parts and the sealing surface of steam turbine box. Because of the self-melting of boron, silicon and other elements, direct spray remelting is used for laser cladding.