ASTM B874-96(2023)

Podrobné informácie

Označenie: ASTM B874-96(2023)

Dátum vydania: 01.11.2023

Stránok: 3

Krajina: Americká technická norma

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Anotácia

This specification covers the requirements for chromium diffusion of metals applied by pack cementation process. The four classes of chromium diffusion coating, defined by the type of base metal, are as follows: Class I (carbon steels); Class II (low-alloy steels); Class III (stainless steels); and Class IV (nickel-based alloys). Specimens shall adhere to processing requirements such as substrate preparation, materials (masteralloys, activators, and inert fillers), loading, furnace cycle, post cleaning, post straightening, visual inspection, and marking and packaging. Specimens shall also adhere to coating requirements such as diffusion thickness, decarburization, chromium content, appearance, and mechanical properties (tensile strength, and macro- and micro-hardness).


Keywords:
chromizing, corrosion-resistant coatings, diffusion coating, pack cementation ,, ICS Number Code 25.220.40 (Metallic coatings)