Ultra-low carbon high-purity industrial pure iron and manufacturing method thereof

Abstract

The invention discloses an ultra-low-carbon (ULC) high-purity industrial pure iron and a production method thereof. The invention is mainly characterized in that: the ULC high-purity industrial pure iron contains chemical elements in weight percentage as follows: C is less than or equal to 0.008 percent, Si is less than or equal to 0.05 percent, Mn is less than or equal to 0.05 percent, S is less than or equal to 0.002 percent, P is less than or equal to 0.005 percent, and Al is less than or equal to 0.055 percent. The materials with the proportions of the above chemical compositions are smelted for dephosphorization and desulfurization in an arc furnace, blown with oxygen for decarbonization by AOD (argon-oxygen decarburization), and desulfurized under high temperature and high alkalinity, and finally cast into steel ingots; therefore, the purity of the steel ingots produced by the method can reach 99.5 to 99.7 percent. The maraging steel trial produced by the pure iron of the invention can reach the best level of the steels in China; the pure iron produced by the method of the invention can also improve the performance of other steels such as 00Ni12Cr5Mo3AlTiVA, and push the research and development of high-purity steels.

Description

technical field [0001] The invention relates to pure iron for iron and steel materials in the field of metallurgy, in particular to novel low-carbon ultra-high-purity industrial pure iron for iron and steel metallurgy in the metallurgical industry. Especially pure iron for high-purity ultra-low carbon, low-sulfur phosphorus, and low-silicon-manganese steels, such as maraging steel and high-purity ultra-low carbon stainless steel. Background technique [0002] At present, my country adopts GB9971 and GB6983 to produce raw material pure iron and industrial pure iron, which are generally used to manufacture electromagnetic components and soft magnetic materials, and are also used to manufacture silicon, manganese, sulfur and phosphorus, which are relatively high, and are generally manufactured by converter or converter + refining outside the furnace, and some Manufactured by AOD furnaces, in recent years Taiyuan Iron and Steel, Baosteel, Wuhan Iron and Steel, Nanjing Steel, etc....

AI Technical Summary

Problems solved by technology

Domestic use of GB9971, GB6983 to produce raw material pure iron and industrial pure iron to produce electrical components and soft magnetic materials can only be used for low-grade components, which cannot be compared with foreign objects. The performance of maraging steel produced with this pure iron is low

At present, my country does not have the production capacity to produce industrial pure iron by electrolysis

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