Purpose

This specification covers the requirements for producing a continuous compound layer with controlled phase composition by means of a gaseous process, automatically controlled to maintain set values of the nitriding and carburizing potentials that determine properties of the nitrocarburized surface. Automatic control is intended to ensure repeatability of nitrogen and carbon content of the compound layer which establishes properties such as wear and corrosion resistance, ductility and fatigue strength.

Application

The nitrocarburizing process has been used typically for enhancement of wear resistance and fatigue strength, as well as corrosion resistance in ferrous alloys but usage is not limited to such applications. Nitrocarburizing can be selectively applied to only those areas that require nitrocarburizing.

Specifically, this process is recommended for those applications where control of phase composition is required.

Classification

The nitrocarburizing process described herein is classified as follows:

Class 1 - Porosity not exceeding 15% of the thickness of the compound (white) layer

Class 2 - Porosity above 10% but not exceeding 50% of the thickness of the white layer

If no class is specified, no limitations shall be placed on the degree of porosity

Safety - Hazardous Materials

While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.