Патент USA US2125664код для вставки
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.