Is the so-called "mountains multiply
and streams double back no doubt, There is a way out". In the late
twentieth Century, the powder metallurgy technology, which developed in Sweden,
has brought a new turning point for Damascus steel.
From 1992 to 1995, the Swedish Erasteel in
powder injection forming steel production process, increase the parting a
powder equipment, so that two kinds of steel powder by the sub equipment
according to layers of lined up for the next step of high temperature and high
pressure welding process, the formation of parallel lines of powder metallurgy
Damascus steel. Modern steelmaking technology can make chemical elements to
achieve the best ratio, but this technology is not perfect. Traditional method
of steelmaking in the steelmaking furnace to molten steel by blowing argon
treatment, vacuum degassing, desulphurization, directly into the sort of metal
to the ratio of the required a variety of elements, and then enter the by
refractory bricks or cement refractory made of ladle, by ladle into the mold
cooling to obtain ingot.
In this process, the steel-making furnace
in various chemical elements distribution is the most homogeneous ideal state,
and after entering the ladle, temperature began to decrease, at this time of
molten steel in the same components will happen aggregation, until into the
mold to cool completely, aggregation phenomenon is more serious, strict
composition is far less than the in furnace even when the. There is a saying
that "the furnace is gold, the bag is silver, cooling is the stone",
that is, the meaning of.
In theory, the use of powder metallurgy to
produce Damascus steel, you can choose the world's two kinds of steel fusion,
but the actual operation is also a grasp of. The choice of the original steel
generally consider the following factors:
Performance complementation -- the
composition match should be satisfied with a particular application; heat
treatment parameters - two kinds of steel should have the same or similar heat
treatment process parameters;
Thermal effect - two steel due to the same
or similar thermal effect, in order to ensure the forging and heat treatment
does not affect the performance of the steel; corrosion patterns of two types
of steel elements in at least one has enough differences to ensure the
clearness of the lines.
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