Chisels
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United States of America Patent
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-
May 10, 2016
Grant Date -
Apr 9, 2015
app pub date -
Dec 11, 2014
filing date -
Mar 22, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A chisel includes an elongate shank portion composed of a first steel, and a working end portion composed of a second steel that is different than the first steel. The working end portion is joined to the shank and configured to chisel a workpiece. The joined shank portion and working end portion has been heat treated to cause the first steel of the shank portion to adopt a first microstructure comprising bainite, the second steel of the working end portion to adopt a second microstructure comprising martensite, and the working end portion to have a greater hardness than the shank portion.
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