发明名称 |
METHOD OF OBTAINING SPHEROIDAL GRAPHITE CAST IRON. |
摘要 |
<p>Cast Fe contg. spheroidal graphte is p graphite is produced by charging the bottom of a ladle with a 1:10-20 mixt. of Mg of particle size 0.05-0.3 pref. 0.1-0.145mm and ferro-Si of particle size 0.05-2.0 pref. 0.1-1.0mm; adding pieces of steel scrap; and filling the ladle with molten Fe. The mixt. added may also contain magnesite of particle size 0.05-1.0mm the mixt. comprising (in wt.%): Mg 5-9, magnesite 10-50 and ferro-Si the balance. The steel scrap pieces are pref. added in an amt. up to 1%, on the amt. of Fe added, to cover the particle mixt. The molten Fe is poured in at 1300-1460 deg.C, the compsn. of the Fe being: 3.0-3.5% C, 1.0-2.0% Si, 0.2-0.5% Mn, 0.03-0.05% P, 0.02-0.1% S and 0.12-0.20% Cr. In a typical process in which 5t. of molten Fe are modified at 1380 deg.C, the process takes 4-5 mins; the fall in temp. is 30-40 deg.C. (not claimed).</p> |
申请公布号 |
EP0395767(A1) |
申请公布日期 |
1990.11.07 |
申请号 |
EP19890902696 |
申请日期 |
1988.11.04 |
申请人 |
NAUCHNO-PROIZVODSTVENNOE OBIEDINENIE PO TEKHNOLOGII MASHINOSTROENIA "TSNIITMASH" |
发明人 |
ALEXANDROV, NIKOLAI NIKITIEVICH;KOVALEVICH, EVGENY VLADIMIROVICH;PESTOV, EVGENY STEPANOVICH;MAGAZNOV, VYACHESLAV DMITRIEVICH;SLJUSAR, ANATOLY NIKOLAEVICH;KAZACHENKO, NIKOLAI SERGEEVICH |
分类号 |
B22D1/00;C21C1/10;C22C33/10 |
主分类号 |
B22D1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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