T1 Heat treat data

[JTknives]

I have started to process my small pile of Japanese T1 planer blades. I am new to using this material. It’s been in the oven for all most 20hrs so far and should be done by the time I get home. I have started researching this steel and was wondering if any of you guys have used any of it before. I did come across some data on it saying it can be heat read with lower austenite temps down to around 1925°f. This is quit low compared to the normal temp of around 2350°f. Thy said it’s good for stuff that wont see high temps or needs high impact strength. What has your results been with this alloy? JT

 

[A.McPherson]

Never used it, but I have an App on my phone that says the following:

Preheat at 15-1600f ( if you have two ovens preheat one at 1-1200f the other at 1555 - 1600f)
Austenitize at 23-2375f heating rapidly from pre-heat. For 2-5 min.
Quench in oil, air or salt.
Stress relive at 3-320f
Refrigerator at -150 to -320
Temper at 1000-1105f for 65-60hrc

I know you probably already have that info, but one never knows!

 

[Larrin]

On the subject of austenitizing lower for toughness, you may find this chart useful.

 

[JTknives]

Thank you. I’m getting ready to run some samples.

 

[Natlek]

I have started to process my small pile of Japanese T1 planer blades. I am new to using this material. It’s been in the oven for all most 20hrs so far and should be done by the time I get home.

May I ask why are you annealing it ?

 

[JTknives]

May I ask why are you annealing it ?

because I want to play with different heat treats and it’s much easier to grind in the annealed condition.

 

[Natlek]

because I want to play with different heat treats and it’s much easier to grind in the annealed condition.

I have one more question if you don t mind ....What is the hardness of planner blade ? I make some knives from that steel and I think that they are not too hard , compared to circular saw from HSS steel ?

 

[JTknives]

I have one more question if you don t mind ....What is the hardness of planner blade ? I make some knives from that steel and I think that they are not too hard , compared to circular saw from HSS steel ?

what alloy are those blades? The ones I have from japan are quite hard but I will measure one when I get home. Thy are harder then the D2 blades I have.

 

[Natlek]

what alloy are those blades? The ones I have from japan are quite hard but I will measure one when I get home. Thy are harder then the D2 blades I have.

They are T1 .........18%W/wolfram/= 18% Tungsten.......