Français
7. Liquid hard deposits
Techniques using the liquid route to improve the friction and wear resistance of tool steels include immersion in molten salts, electroplating processes (hard chromium plating) and electroless chemical reduction (nickel-phosphorus or nickel-boron).
7.1 Immersion in molten salt baths
Due to their high reactivity, molten salt baths containing chlorides with added metal elements such as Cr, V are likely to produce surface reactions of the dissociation and exchange type at temperatures close to 1,000°C. These reactions result in the supply and diffusion of metallic elements from the bath into the substrate. Back-diffusion of carbon from the substrate to the surface results in the creation of a deposit of carbides, whose thickness does not exceed 15 µm due to the...
The Ultimate Scientific and Technical Reference
This article is included in
Metal treatments
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Liquid hard deposits
Hardfacing techniques
Bibliography
Standards
- Steel designation systems – Part 1: symbolic designation. - NF EN 10027-1 - 2-2017
- Steel designation systems – Part 2: digital systems. - NF EN 10027-2 - 6-2015
- Aciers à outils. - NF EN ISO 4957 - 6-2018
- Nitriding steels – Technical delivery conditions. - NF EN 10085 - 3-2002
Appendices
Organizations – Federations – Associations (non-exhaustive list)
Center technique des industries mécaniques (CETIM), BP 67, 60304 Senlis Cedex
Association de Traitement Thermique et de Traitement de Surface (A3TS), 71 rue Lafayette, 75009 Paris, France
The Ultimate Scientific and Technical Reference
