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空心管坯熱頂電磁連鑄工藝的研究
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TG146.4

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國家自然科學(xué)基金-上海寶鋼“鋼鐵聯(lián)合研究基金”資助項(xiàng)目(50270417)


Research on Hot-top Electromagnetic Continuous Casting of Hollow Billets
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    摘要:

    根據(jù)空心管坯的特點(diǎn),提出了熱頂技術(shù)和冷坩堝技術(shù)相結(jié)合的空心管坯電磁連續(xù)鑄造的工藝思想。采用低熔點(diǎn)的Sn-4.5% Pb(質(zhì)量分?jǐn)?shù),下同)合金進(jìn)行了模擬試驗(yàn),成功制備了φ60 mm?5 mm的空心管坯。研究了熱頂和冷坩堝式外結(jié)晶器對(duì)鑄型內(nèi)磁場分布的影響,分析了電磁場對(duì)空心管坯質(zhì)量的影響。結(jié)果表明:采用帶屏蔽罩的熱頂和冷坩堝式外結(jié)晶器,優(yōu)化了鑄型內(nèi)的磁場分布;當(dāng)施加功率為12 kW、頻率為2 500 Hz的中頻電磁場時(shí),得到了表面光滑、宏觀凝固組織中具有高等軸晶比率的高質(zhì)量空心管坯。

    Abstract:

    According to the characteristics of hollow billets, a hot-top electromagnetic continuous casting process is proposed, based on a combination of the hot-top technique and a cold crucible. Sn-4.5%Pb (wt%) was used as the experimental material to study the effect of hot-top and cold crucible outer mould on the distribution of electromagnetic field. The effect of the electromagnetic field on the quality of hollow billets was analyzed. The results indicated that use of the hot-top with screen and cold crucible outer mould, while imposing an electro- magnetic field of 12 kW with the frequency of 2 500, can improve the distribution of electromagnetic field in the mold. In this ways high quality hollow billets can be obtained, whose solidification macrostructure consists of equiaxed grains of high ratio and a smoother surface.

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李丘林,李廷舉,金俊澤.空心管坯熱頂電磁連鑄工藝的研究[J].稀有金屬材料與工程,2004,33(4):429~431.[Li Qiulin, Li Tingju, Jin Junze. Research on Hot-top Electromagnetic Continuous Casting of Hollow Billets[J]. Rare Metal Materials and Engineering,2004,33(4):429~431.]
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  • 最后修改日期:2003-07-28
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