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Your application involves hardfacing pieces as moulds. And you use manual powder guns with oxy-acetylene flame process.

Tungsten inert gas welding or GTAW-gas tungsten arc welding. This process is used when an very high welding quality is required (pressure vessels, piping, food containers, etc).
An additional filler metal may be used either manually (wire rod) or in an automatic process through a separate wire feeder.
Researchers in the Air Liquide Group have studied this process to learn more about it and to propose the most suitable shielding gases like ARCAL.

This process consists in heating very quickly punctually or over a narrow area a sheet or a welded set of pieces with a flame. This operation allows to rectify the distortions on the thermally affected zone during the welding cycle. This shrinking process, particularly used in the shipyards, can be performed with carbon steels and stainless steels. Gases used for the heating flame are oxygen and acetylene.

Flame welding is a process widely used in working sites or repair shops. It is performed with a welding torch and exclusively with an oxy-acetylene or oxy-crylene (available in some countries) flame.

Easy to settle, this process is versatile for numerous materials.
It shows a highly flexible use :

- Access to pieces to be welded
- Usability
- Mobile tool
- Autonomy (installation is free from any external energy source)

Recommended products: FLAMAL gas range, acetylene, oxygen, ROLLERFLAM welding kit.

MIG: Metal Inert Gas welding (inert gases such as argon, helium or mixes).
These mixes are mainly used for sensitive stainless steels and aluminum or copper alloy welding.

Flame applications for cutting processes require FLAMAL, the oxy-fuel flame and straight oxygen as a cutting jet to separate the metal.
Mainly used in automatic for separating metals of more than 15 mm thickness, this process is efficient on carbon steels and sometimes on stainless steels with iron powder (heavy thickness of over 60 mm).
The high flexibility of this process combined with its excellent cutting performances confer it a very general-purpose character. It is thus very used for manual and automatic operations in metal fabrication, shipyards, boilers, scrapping, installation, etc.

Thermal coating, wire flame coating - anti-corrosion or wear-resistant coating.

Brazing processes are either manual or automatic. They are used for heat exchangers in air conditioning, taps, sanitary equipment and compressor parts ...
Fuel gases are Acetylene, FLAMAL or Hydrogen.
Recommended products : FLAMAL Flo,Oxygen, Acetylene, FLAMAL, ALTOP, ROLLERFLAM

Using nitrogen increases their lifetime and therefore decreases the recycling or treatment of this waste...

Quenching is the process of modifying the surface properties of a piece, mainly to harden the surface.