Si, Mn, P添加高強度溶融亜鉛めっき鋼板の合金化特性および耐パウダリング性に及ぼす内部酸化の影響
Si, Mn, P添加高強度溶融亜鉛めっき鋼板の合金化特性および耐パウダリング性に及ぼす内部酸化の影響
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内氧化对Si、Mn、P添加高强镀锌钢板合金化性能及抗粉化性能的影响
DOI：
10.4139/sfj.58.183
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
栄史 藤田
中科院分区：
文献类型：
--
作者：
善継 鈴木;芳春 杉本;栄史 藤田
0.3mass%Si-1mass%Mn-0.07mass%P超低碳热轧钢在热处理过程中，Si、Mn、P等易氧化元素发生内氧化，在钢表面形成贫层。冷轧钢经再结晶退火处理后，Si和Mn的选择性表面氧化量得到明显抑制，热镀锌钢的合金化速度加快，与低碳钢相当。结果表明，合金化热镀锌钢的合金化温度降低，合金化热镀锌钢的抗粉化性能显著提高，合金化热镀锌钢的合金化热镀锌行为加快，抗粉化性能提高的原因是：1）抑制了Si和Mn选择性表面氧化的量，该氧化是Fe-Zn合金化反应的障碍。2）抑制了溶质P的量，该溶质P延迟了Fe-Zn合金化反应，降低合金化温度可以抑制高温下形成的不利于抗粉化性能的Γ相和Γ1相。
During the heat treatment of 0.3mass%Si-1mass%Mn-0.07mass%P ultra low carbon hot-rolled steel, readily oxidizable elements such as Si, Mn and P were internally oxidized and a depletion layer of these elements was formed at the steel surface region. The amounts of Si and Mn selective surface oxidation of the cold-rolled steel were remarkably suppressed after recrystallization annealing.By this heat treatment of the hot-rolled steel, the galvannealing rate of the galvanized steel was accelerated to a rate equivalent to that of mild steel. As a result, the galvannealing temperature of the galvannealed steel could be lowered and the anti-powdering properties of the galvannealed steel were remarkably improved.The reasons for acceleration of the galvannealing behavior and the improvement of the anti-powdering properties, were considered as follows :1) The amount of Si and Mn selective surface oxidation, which acted as a barrier for the Fe-Zn galvannealing reaction, was suppressed.2) The amount of solute P, which delays the Fe-Zn galvannealing reaction, was reduced.3) The reduction of galvannealing temperature brings about the suppression of the Γ and Γ1 phases formed at the higher temperature, those unfavorable for anti-powdering properties.