just pondering

[clockworkfish]

A few new questions!
First, why shouldnt you pry with a knife? is it a geomitry issue? a pivot pin issue? a steel type issue? or perhaps heat treat?

Second, i was thinking about this earlier but wouldnt it be possible to make a frame lock knife with only high carbon steel? (including spring)

third, with a rivited pivot pin is there any way to reduce the amount that it will loosen over time?

fourth, ok so lets say you want to create a spring, you would need to take the steel beyond critical temp and then reduce the temp beneath the curve in a specific amount of time then temper it to 50-45 rc. if you were to quench with a slower medium could you bypass the tempering process?

 

[Frank Niro]

Time to answer one or two of your questions
Place all these items on your bench; a screw driver, a hammer, a chisle, a drill bit, a crow bar, and of course a knife. Now use just one of these to do the job the others do. Now you know why a knife is not a pry bar.
Of course you can make a frame lock of just carbon steel . Why not?
Why should a rivetted pin used correctly loosen over time? Frank

 

[Bo T]

third, with a rivited pivot pin is there any way to reduce the amount that it will loosen over time?

fourth, ok so lets say you want to create a spring, you would need to take the steel beyond critical temp and then reduce the temp beneath the curve in a specific amount of time then temper it to 50-45 rc. if you were to quench with a slower medium could you bypass the tempering process?

Keep it lubricated to reduce wear and don't apply to much lateral stress. I have a buck 110 that has a loose blade due to the fact that I opened it one handed, a lot.

Your second question NO. With your high carbon steels you will need to miss the pearlite nose. To do that you will need a quench medium that is fast enough to accomplish that task. To much pearlite will not a good spring make. You need to make martensite then temper the matensite back to a spring temper. You need to be careful with heating the steel too high as this will cause grain growth and large grain size dose not a good spring make. There are some more complex steels that might be more forgiving in some ways than 10xx high carbon.