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Faculty of Engineering and Natural Sciences, University of Zenica , Zenica , Bosnia and Herzegovina
Faculty of Engineering and Natural Sciences, University of Zenica , Zenica , Bosnia and Herzegovina
FACULTY OF ENGINEERING AND NATURAL SCIENCES, University of Zenica , Zenica , Bosnia and Herzegovina
FACULTY OF ENGINEERING AND NATURAL SCIENCES, University of Zenica , Zenica , Bosnia and Herzegovina
FACULTY OF ENGINEERING AND NATURAL SCIENCES, University of Zenica , Zenica , Bosnia and Herzegovina
Steels for screws, nuts and rivets are usually low carbon steels, carbon steels or quenched and
tempered low alloy steels. From these are required precisely defined strength properties, hardness
and toughness, which determine the so called class strength of screws.
This paper describes the thermal treatment of hexagonal screws with strength class according to DIN
ISO931/8.8 or14014.
In addition, this paper also provides information about heating aggregate, ie flow furnace with
protective atmosphere in which screws were heated, followed after what in technological line, was
automatically done quenching in oil.
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