GUNSMITHING AND TOOL MAKING BIBLE

(Tuis.) #1

or you may be cutting to fast.


Whatever the reason you do not want this to happen as it is putting a lot of internal stress in the reamer
blank. When heat-treating the blank will probably warp badly. If you fill there is stress in the reamer blank,
I would suggest that when you get ready to heat-treat the reamer, that you put the reamer in the furnace
when you turn it on.


Bring the temperature up to 1000 degrees, and let it set for 30 to 40 minutes. Remove and bury it in lime
until cool, or turn off the furnace and let it cool over night.


HEAT TREATING THE REAMER


Bring the temperature of the furnace up to the temperature that is recommended by the maker of the tool
steel. Coat the reamer blank with some decarbonizing powder, and put the reamer blanks in the furnace
and let set for 10 minutes. Remove and quench in the oil tank, or what other quenching medium the
manufacture recommends.


When you quench the blank make sure that you go straight in the quenching tank, if you quench the
reamer at an angle, you will warp it. If you do warp a reamer you will have to bring the reamer up to 1500
degrees and let it cool in the oven, then straighten it when cool.


When you have both reamers quenched, lay them down on something where they won't roll off. They are
very hard and brittle, and if they fell on the cement floor, they would probably break.

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