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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) Application No.: 1253/MUM/2004 A
(22) Date of filing of Application: 22/11/2004 (43) Publication Date: 09/06/2006
(54) Title of the invention: A PROCESS FOR THE MANUFACTURE OF COMMERCIAL GRADE
NODULAR/SEMI NODULAR CAST IRON ALLOY
(51) International classification : C22C 1/00
(31) Priority Document No : NIL
(32) Priority Date : NIL
(33) Name of priority country : NIL
(86) International Application No : NIL
and Filing Date : NIL
(87) International Publication No : NIL
(61) Patent of addition to :
Application No
NIL
(62)
Filed on : N.A.
Divisional to Application No : NIL
Filed on : N.A.
(71) Name of Applicant:
S.B.RESHELLERS PVT.LTD.
Address of the Applicant:
PLOT NO. D5 & D15, M.I.D.C.
INDUSTRIAL ESTATE, SHIROLI,
KOLHAPUR 416 122,
MAHARASHTRA, INDIA.
(72) Name of the Inventor:
ANANT SHRINIVAS HULGOL
Filed U/S 5(2) before The Patents
(Amendment) Act, 2005: NO
(57) Abstract: A process for manufacturing nodular, semi nodular ductile/ cast iron alloy compriswing the following steps:-
B.de-sulphurising of the molten iron metal taken from cupola arc furnace, induction furnace or rotary furnace, if required,
treating for reducing the sulphur contents of the molten metal to around 0.025%-0.035%, preferably by treating the
molten metal with soda ash (Sodium carbonate-approximately 1% by weight of the molten metal, and separating the
floating slag so formed);
B.taking nodulariser alloy consisting of magnesium (Mg) 8% to 10% preferably 9.5%, silicon (Si) 43% to 48% preferably
44.50%, calcium (Ca) 0.8 to 2.5% preferably 2.20%, Rare Earths (RE) 0.8 to 2.5% preferably 2.00%, aluminium (A1) upto
1.2% preferably 0.60%, Iron (Fe) balance, in the pocket of the ladle, from 1 to 2% by weight of the molten metal; C. covering
the above said alloy with incoulant Ferro Silicon and iron chipping, turning and the like;
C. pouring the molten metal, mainly consisting: Carbon-3.2 to 3.5%, Si-1.4 to 2%, Mn-0.2 to 0.9%, S-0.01 to 0.2%, Fe
balance, at temperature between 1225C to 1550C, preferably between 1300C to 1500C, in the said ladle resulting to a
self mixing violent reaction, forming ductile/ cast iron alloy having spheroidal or spherulital graphite structure,
improved mechanical properties with excellent weldability which is suitable for producing large size section having
higher section thickness, such as shells of sugar mill rollers and the like.
Drawing: 06 Sheets.
Total Pages: 37.
Fig. Nil
The Patent Office Journal 09/06/2006 10919