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本文利用LEITZ-T.A.S.图象分析仪研究60Si2 Mn汽车弹簧钢的夹杂物形态,其中用不同的稀土加入量对比研究夹杂物的变形系数和夹杂物颗粒大小.研究结果表明:加工变形后,非稀土夹杂物伸长了35. 4%,而稀土夹杂物仅有3.O～14.8%;因而非稀土夹杂物的变形显是稀土夹杂物的2.3～11.5倍.同时还表明:大颗粒夹杂物(14. 0～85.4μ)未加稀土的多,加稀土的少;小颗粒夹杂物(1.4～12.6μ)则完全相反.因此,稀土夹杂物颗粒比非稀土夹杂物颗粒平均变小了22～37%.所以,稀土使钢中夹杂物变形量减少和颗粒变小.本文还对稀土夹杂物数量和稀土夹杂物在钢锭中的分布进行了研究.
In this paper, LEITZ-TAS image analyzer was used to study the inclusions morphology of 60Si2Mn automotive spring steel, and the deformation coefficients of inclusions and the size of inclusions were compared with different rare earth loadings. The results show that after deformation, Inclusions elongation of 35.4%, while the rare earth inclusions only 3.O ~ 14.8%; thus non-rare earth inclusions deformation significantly 2.3 ~ 11.5 times the rare earth inclusions also showed that: large particles inclusions 14. 0 ~ 85.4μ) is not more than rare earth, rare earth and less; small inclusions (1.4 ~ 12.6μ) is exactly the opposite. Therefore, rare earth inclusions particles than non-rare earth inclusions particles become smaller on average 22 ~ 37% .Therefore, rare earths reduce the amount of inclusions in steel and reduce the particles.In this paper, the number of rare earth inclusions and the distribution of rare earth inclusions in the ingot were also studied.