Hi to all
Time has come and I need to make a custom tap for my boring head, in question is a M8x0,5
For this step I made a lot of reserach, in this forum and the net, but all I can get is a confusing 1000 metods to archieve the hardening process
some are extreme simple like "heat to cherry-red then quenching then temper", other come with a full cientific explanation and lots of temperatures ranges etc...
I only need to harder my custom tap (not made yet) at my home and I dont know how to proceed, this is all I have found and confused myself:
first heat up to "cherry-red", with a magnet check for the critical point (ok I understand it)
then quench the tap intro ???
1) water (ambient temperature or with ice cubes I dont know the diference): this as far as I know will give me the max hardening, but the steel will be too brittle.
2) oil: this will made it a little less brittle, but still brittle (cant tell more ???)
For like 30-60 seconds
Then the tempering:
First of, clean the black finish on the tool to see the steel color, then heat up to a emmmm straw color (white yellow I believe) or at any color depending the hardeness requiered (I seen a lots of color and degree list for tempering)
Then I dont know, some people let it slow cool in the air, some other quench it again I dont know in water or oil..
All I got is: 8mm Silver steel rod, a butane/propane torch, a magnet and burned motor oil
nothing to measure the temperature or a powerfull oven to let it temper for 2 hours (only a kitchen oven)
how I should proced? my thoughts:
Heat to the point that is not magnetic, then quench on oil then heat to yellow "straw" color then... ???
In my search in the forum see lots of you guys hardening stuff for your engines and tooling, seems like a so easy process, but finding a lot of ways to do it that Im just to confused to go on
please some one can give me a straight answer on how to do?? I will appreciate it a lot
Saludos!
Time has come and I need to make a custom tap for my boring head, in question is a M8x0,5
For this step I made a lot of reserach, in this forum and the net, but all I can get is a confusing 1000 metods to archieve the hardening process
some are extreme simple like "heat to cherry-red then quenching then temper", other come with a full cientific explanation and lots of temperatures ranges etc...
I only need to harder my custom tap (not made yet) at my home and I dont know how to proceed, this is all I have found and confused myself:
first heat up to "cherry-red", with a magnet check for the critical point (ok I understand it)
then quench the tap intro ???
1) water (ambient temperature or with ice cubes I dont know the diference): this as far as I know will give me the max hardening, but the steel will be too brittle.
2) oil: this will made it a little less brittle, but still brittle (cant tell more ???)
For like 30-60 seconds
Then the tempering:
First of, clean the black finish on the tool to see the steel color, then heat up to a emmmm straw color (white yellow I believe) or at any color depending the hardeness requiered (I seen a lots of color and degree list for tempering)
Then I dont know, some people let it slow cool in the air, some other quench it again I dont know in water or oil..
All I got is: 8mm Silver steel rod, a butane/propane torch, a magnet and burned motor oil
nothing to measure the temperature or a powerfull oven to let it temper for 2 hours (only a kitchen oven)
how I should proced? my thoughts:
Heat to the point that is not magnetic, then quench on oil then heat to yellow "straw" color then... ???
In my search in the forum see lots of you guys hardening stuff for your engines and tooling, seems like a so easy process, but finding a lot of ways to do it that Im just to confused to go on
please some one can give me a straight answer on how to do?? I will appreciate it a lot
Saludos!