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HIGH STRENGTH FLAKE GRAPHITE IRON USING RARE EARTH ELEMENT AND PREPARATION METHOD THEREOF 发明申请

2023-02-17 1220 423K 0

专利信息

申请日期 2025-07-12 申请号 KR1020120008330
公开(公告)号 KR1020130087213A 公开(公告)日 2013-08-06
公开国别 KR 申请人省市代码 全国
申请人 DOOSAN INFRACORE CO LTD
简介 PURPOSE : High-strength flake graphite iron using rare-earth elements and a manufacturing method thereof are provided to obtain stable structure, excellent fluidity, high tensile strength, and high hardness by precisely controlling a ratio of sulfur and the rare-earth elements.CONSTITUTION : A manufacturing method of high-strength flake graphite iron using rare-earth elements is as follows : a step of melting iron materials containing 3.3-3.4 wt.% of C, 2.0-2.2 wt.% of Si, 0.6-0.8 wt.% of Mn, 0.04 wt.% or less of P, and the rest of Fe in a furnace to manufacture molten iron; a step of adding 0.15-0.2 wt.% of S and 0.01-0.03 wt.% of the rare-earth elements to the molten iron; a step of adding Sr-based inoculants to the molten iron tapped to a ladle; and a step of injecting the molten iron to a mold (500).COPYRIGHT KIPO 2013


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