BluntCut MetalWorks
Knifemaker / Craftsman / Service Provider
- Joined
- Apr 28, 2012
- Messages
- 3,462
ime
When ht tinkering low/no Cr steels, I use overly prone to rust/corrosion as indicator of botched ht. I can confirmed for most of these botched cases using a lighted microscope (polished and etched samples) - often matrix microstructure has excess dislocation/stress from combination of large grain and high % of plate martensite. Translate to more gaps to trap & migrating corrosive agents.
https://www.researchgate.net/public...teel_and_the_effects_on_mechanical_properties
If you look at O1 ht literature, noted carefully/caution worded on quench cooling speed, especially between Ms (mart start) and room temperature. Well maybe some observed O1 eager to rust perhaps because there are higher proportion percent of poor and botched O1 ht blades out there vs other carbon steels.
When ht tinkering low/no Cr steels, I use overly prone to rust/corrosion as indicator of botched ht. I can confirmed for most of these botched cases using a lighted microscope (polished and etched samples) - often matrix microstructure has excess dislocation/stress from combination of large grain and high % of plate martensite. Translate to more gaps to trap & migrating corrosive agents.
https://www.researchgate.net/public...teel_and_the_effects_on_mechanical_properties
If you look at O1 ht literature, noted carefully/caution worded on quench cooling speed, especially between Ms (mart start) and room temperature. Well maybe some observed O1 eager to rust perhaps because there are higher proportion percent of poor and botched O1 ht blades out there vs other carbon steels.