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Патент USA US2125664

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Aug. 2, 1938.
I
F._BVARME
27,125,664 `
IRON ANNEALING RECEPTACLE'
Filed March 3l, 1957
2 Shee‘bS--Sheei'I
im? film
l
Mmm,
ì E25/Vm ef
Patented Aug. z, 193s
2,125,64 `
M
EFTA
i
-
en, «Grey
937„
‘ t
r
~ i t)
(ci.
_
r
i ai
„t
rolled ina
me
cleo,
snob a
it hat iiitberto i»
ior
d iron
wu to
boites oi caet steel
ata-»io
f
account oi this covering of the receptacle
“ ‘
d tbe lilre,
tailor1 annena
alle oi a tni im
No. 134,175
r' d, 1936
oi
ita total wall thickness is brought to a size which
ie very iavorable ior practical purposes.
e
teriai for the covering is preferably
Nichrotherm,
alloy of highV melting point
which resists scale and corrosion and ensures
rapid heating and cooling of the receptacle. The
auch tbi ir na, in
to tbe
ticies
er.
m result
'a
neavv load due
however.,
tbe
t time bores are comparativelv ireavv
d at eacb traum the large mass ci the
bor bas to be heated up.
addition i ,it to
time presence or ormaen
ere ia a consi erable
»ioation oi ace on tbe
nes at each heating
e resnlt is a ,comparatively lona
it and coo.
‘ mi oi anneaiina and a rapid deterioration of
tbe
nea bones
coattae
vvbich considerably ' increa
the
it ia on account voi there disadvantages that
@it vor com@ time
oi’ refractory metal
nails.
bones have been made
d vvitii comparatively tiiin
Sucio bones however, are e
damaged
during manipulation., for enple, vvhen- being
removed iront the t: eaiing furnace. Moreover,
the refractory metal is very sensitive to thin
ao
tilt
ior the meshes is preferably refractory
4clav or any other suitable substance with good
eal conductivity.
veral constructional examples of the inven
tion are illustrated in the accompanying draw
inae.,
,
‘l
Vi- l. shows an annealing box in axial section.
Fie. Z is a side elevation.
15
Fig. il is a cross section.
_
Flr. ii siio'tvs a iurther construction of an an
nealing bon according to the invention 'in axial
section.
'
Fig. 5 is a side elevation.
20
Fig. o shows an annealing hood or box pro
vided with the protective covering according to _
the invention in longitudinal section.
Fig. 7 is a cross section.
~
a is the annealing receptacle proper of cast
N) 5
dames and tbe‘sulpbur contained therein so that ' steel, wrought iron or of a specially heat re
the length oi life oi the boxes and tbe operating sisting metal. b is a net-like protective covering
'which is made of ordinary wrought iron or pref
costs are detrinientaily aüeoted.
i
erably ci a metal which resists scale and corro
lit iras already been proposed to avoid the ac
tion oi tire neatina gasses on the annealing bores sion, for example, Nichrotherm. The meshes of 05 0
and tbe scaling thereof due to contact vvitii the the net-like protective covering are filled with a
airv by screening the bon with a protecting jacket nre resisting material c of good thermal con
oi beat resisting sheet etal. This irnovvn soreen~ ductivitv.
iin-order to protect the covering on the bot
ing however. again leads to tbicesses oi the
aealing bor vvali winch have a detrimentai Atrim of tine annealing box from damage the bot 35
edect on themanipulation and the operation, tom of the box can be suitably set back as shown
that is, rapid bea
and cooling oi the box. in Figures t and 5, with respect to a supporting
also a protective jaciret oi beat resist
sheet` edge a1 in order to form a cavity in which the
covering is placed. Obviously the provision of
metal is vers,r sensitive to t
dames am` the
sulphur cont ed therein
d therefore will the protective covering according to the inven
lise-li be deetroved in a comparatively snort time. tion is not limited to the ‘annealing receptacles
'in order to avoid these drawbacks and also illustrated but is also applicable to any type of
annealing receptacle.
to obtain the advtaae oi t
walled anneal
receptacies accorg to tbe invention the
l. .an external protective covering for an iron 45
t
Walled receptacle, for eaampie, an’eal
»dit ing boit, an anneag ho
ealing receptacle. Aconsisting of a network
or pot and tire iiire,
is surrounded by a -protective covering in the oi expanded metal and a refractory material of
io
oi a nett/vorn, ior
mi»
oi ended goed thermal conductivity ñlling the meshes of
the network.
'
metal which protects the receptacle
t dam
d. a iron annealing receptacle having an ex
aire. l'libe edect oi
protective covering is
tartiner improved according to the invention by ternal protective covering constructed in the form
-the meshes ci the network being nlied with a
oi a network of expanded metal and a supDOi‘t
material oi nood the
ing edge around the bottom of the container'for
the
conductivity which at
:i e time afiordsreliable protection against
55 ioation of scale and corrosion oi ytire recep
tacle.
'
~
io wv
cove
a depression ln which the protective
may be placed.
55
r'RmDRIcH Bamm.
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