DIN 17022-3:1989-04

1 Scope and field of application
2 Terminology
3 Principles of case hardening
4 Indication of case-hardened condition in documentation
5 Procedure
      5.1 Workpiece preparation and pretreatment
             5.1.1 Workpiece preparation
             5.1.2 Stress relieving
             5.1.3 Normalizing
             5.1.4 Hardening and tempering
             5.1.5 Preparation for local carburizing or
                      carbonitriding
             5.1.6 Charging of workpieces
      5.2 Heating to treatment temperature
      5.3 Carburizing
             5.3.1 Carburizing with constant carbon
                      potential
             5.3.2 Carburizing with variable carbon
                      potential
             5.3.3 Case depth
             5.3.4 Carburizing in solid media (granulate)
             5.3.5 Salt bath carburizing
             5.3.6 Gas carburizing
                      5.3.6.1 Gas carburizing with carbon
                                 potential control
                      5.3.6.2 Gas carburizing without
                                 carbon potential control
      5.4 Carbonitriding
             5.4.1 Salt bath carbonitridingn the case of
                      gas carburizing
             5.4.2 Gas carbonitriding
      5.5 Quench hardening
             5.5.1 General
             5.5.2 Direct hardening
             5.5.3 Single hardening
             5.5.4 Double quench hardening
      5.6 Sub-zero treatment
      5.7 Tempering
6 Heat treatment media
      6.1 Heating media
             6.1.1 Liquid heating media
             6.1.2 Gaseous heating media
             6.1.3 Vacuum
      6.2 Carburizing and carbonitriding media
             6.2.1 Solid media (granulate)
             6.2.2 Salt baths
             6.2.3 Gases
                      6.2.3.1 Gases for carburizing
                      6.2.3.2 Gases for carbonitriding
      6.3 Cooling and quenching media
             6.3.1 Liquid quenching media
             6.3.2 Gaseous cooling media
             6.3.3 Cooling media for sub-zero treatment
7 Instructions on equipment used in heat treatment
      7.1 Heat treatment furnace
      7.2 Cooling and quenching equipment
      7.3 Sub-zero treatment equipment
8 Defects in heat treated workpieces
9 Heat treatment as a criterion in design
10 Instructions on straightening
11 Inspection of heat treated workpieces
Appendix A
         A.1 - Recommended surface carbon content for low
               retained austenite levels
         A.2 - Relationship between carbon potential and gas
               composition in the case of gas carburizing
         A.3 - Local case hardening
Standards and other documents referred to

This standard is included in DIN HDBK 218. Gives criteria for case hardening procedure and gives instructions on the case hardening of steel workpieces and tools.