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Case hardening depth.
Gas-carburizing penetration estimates and measured hardness-depth evaluation. Planning results are not heat-treatment recipes or inspection acceptance. Heat treatment is coordinated through outside partners.
Process and source boundaries
Gas carburizing
Li's constant-boundary diffusion model supports a planning estimate. It does not solve low-pressure pulse cycles, carbonitriding, or changing carbon-potential schedules.
Li, 2016: model and production comparisonsNitriding
The Thermex 4140HT survey reports a 48-hour process, but no furnace temperature or atmosphere history. Its measured profile is an example, not a time-depth calibration.
Thermex: original hardness surveyInduction and flame
No predictive mode. Geometry, local heating and quench require a qualified thermal process. Induction additionally depends on coil position, frequency, power and scan speed.
Inductotherm: induction process controlsDepth definition
ISO 18203:2026 replaces the 2016 edition. This is not a standards-conforming inspection system. The specified criterion, test load, surface condition and material-removal allowance govern.
ISO 18203:2026Source-based estimates and locally entered measurements are not approved manufacturing instructions. Do not send controlled technical data through public forms.
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