Martensitic stainless steel can be sprayed or melted

       Stainless steel has a high chromium content, and the carbon content varies widely from ultra-low carbon of less than 0.03% to high carbon of more than 1%.



Stainless steel has a wide range of uses, not only has excellent corrosion resistance, but also has excellent high-temperature oxidation and heat resistance properties. Therefore, it is often used as a heat-resistant steel coating in practice.



It can also be used as a low temperature, non-magnetic, wear-resistant material. All stainless steel wires currently used for welding can be used for spraying.





Martensitic stainless steel contains 12%~18% chromium, and the commonly used grades of wire are: 0Cr13~4Cr13, 7Cr13, etc.



During the spraying process, the martensitic stainless steel particles have hardenability, high bonding strength between particles, high coating hardness, good wear resistance, and quite good corrosion resistance.



It is often used for surface strengthening of working parts under severe wear and moderate corrosion conditions, especially for the spraying of shaft parts, and the coating does not crack.



Martensitic stainless steel coating has good medium temperature wear resistance and can work stably at T<450 temperature. However, due to the martensitic transformation and hardening during rapid cooling (quenching), accompanied by a 4% volume expansion rate, care should be taken to slow cooling after spraying.



Martensitic stainless steel with high carbon content reduces the chromium content of the matrix structure due to the formation of chromium carbides. If the chromium content is less than 12%, the corrosion resistance will be reduced.



Martensitic stainless steel is generally used to prepare surfaces that require high hardness, and can be sprayed or melted.