摘要本课题主要研究通过控制炉渣成分,冶炼温度等变量来炼制含Ti合金钢,并通过显微组织观察,成分分析等来确定含Ti热作模具钢的最佳实验室冶炼条件。结果表明:
(1) 渣系:理论计算两组渣系并没有太大的脱磷效果的区别,但是经过夹杂物组织分析发现,B组渣系(50%BaO,20%CaO,10%Fe2O3,10% Al2O3,10%CaF2)的脱磷效果要优于A组渣系(40%BaO,30%CaO,10%Fe2O3,10% Al2O3,10%CaF2)。87635
(2) 冶炼温度:温度低于1600℃(1873K)时,脱磷效果随着冶炼温度提高而提高;但当温度超过1600℃时,随着冶炼温度的提高,脱磷效果反而有所降低。温度在1600℃获得最高脱磷率为43。9%。并且当温度在1600℃时,钢中的偏析和夹杂物也较少。在其他条件不变的情况下,冶炼温度越高,钢的维氏硬度值越低。 毕业论文关键词:含Ti热作模具钢;冶炼温度;炉渣组成;钢锭成分;脱磷
Abstract This topic main research by controlling the slag composition, smelting temperature variables to refining containing Ti hot-work die steel, and finally confirmed best laboratory containing Ti steel smelting condition by microstructure observation and component analysis 。The results showed that:
1:slag composition:Slag series: theoretical calculation found the effect of two groups of slag composition is not much difference, but after inclusion group analysis found that the group B(50%BaO, 20%CaO, 10%Fe2O3, 10% Al2O3, 10%CaF2) of dephosphorization effect is superior to group A (40%BaO, 30%CaO, 10%Fe2O3, 10%Al2O3, 10%CaF2)。
2: smelting temperature: When temperature is below 1600 ℃ (1873K), dephosphorization effect as the smelting temperature increase and improve; But when the temperature exceeds 1600 ℃, with the improvement of smelting temperature, dephosphorization effect decreases instead。 In 1600℃ system got the highest dephosphorization rate was 43。7。Celsius 。And when the temperature at 1600℃ , less segregation and inclusions in steel。 Smelting in the case of other conditions unchanged, the higher the temperature, the lower the vickers hardness value of the steel。
Key words:Containing Ti hot-work die steel ;smelting temperature; slag composition; ingot composition; dephosphorization