60Si2MnA弹簧钢中夹杂物热力学分析
首发时间:2015-06-24
摘要:本文通过利用FactSage热力学软件计算了CaO-Al2O3-SiO2-MgO系夹杂物中各组分对四元系低熔点区域的影响以及60Si2MnA硅锰脱氧弹簧钢获得良好变形能力的夹杂物时钢液的条件。计算结果表明:对于60Si2MnA硅锰脱氧弹簧钢,随着夹杂物中MgO、Al2O3和CaO含量的增加,该四元系夹杂物低熔点区域先增大后变小,当MgO含量为10~15%,Al2O3含量为20%左右,CaO含量为40~50%,SiO2含量为40%以上,CaO/SiO2控制在1.2以下时,可获得低熔点塑性氧化夹杂;同时,为获得CaO-Al2O3-SiO2-10%MgO系低熔点夹杂物,钢中[O]和[Al]应分别控制在10~25ppm和10~20ppm。
关键词: 60Si2MnA弹簧钢 夹杂物 塑性化 热力学
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Thermodynamics of oxide inclusions in 60Si2MnA spring steel
Abstract:The effects of oxide components on the lowing melting point zone of CaO-Al2O3-SiO2-MgO system and the molten steel conditions in equilibrium with the lowing melting point inclusions in 60Si2MnA Si-Mn deoxided spring steel were calculated by thermodynamic software FactSage. The results show that the lowing melting point zone of CaO-Al2O3-SiO2-MgO system increases first and decreases later with the addition of MgO, Al2O3 and CaO. The lager lowing melting point zone and plastic inclusions are achieved at 10~15% MgO content, 20% Al2O3 content, 40~50% CaO content, above 40% SiO2 content and CaO/SiO2 weight ratio below 1.2. Meanwhile, in order to obtain lowing melting point inclusions of CaO-Al2O3-SiO2-10%MgO system, the [O] and [Al] contents should be controlled within the ranges of 10~25ppm and 10~20ppm,respectively.
Keywords: 60Si2MnA spring steel oxide inclusions plastification thermodynamics
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