| Experimental Study and Thermodynamical Calculation on the Formation of Eutectic Phase of MnS-RE_2S_3 and(Mn,Ca)S-RE_2S_3 in Sulfur-Containing Free-Cutting Steel |
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| 作者姓名： | 江来珠 崔崑 |
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| 作者单位： | 2nd Department of Mechanical Engineering Huazhong University of Science and Technology，Wuhan 430074，China，2nd Department of Mechanical Engineering，Huazhong University of Science and Technology，Wuhan 430074，China |
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| 基金项目： | The project supported by the National Natural Science Foundation of China |
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| 摘 要： | The free-cutting phase in RE or Ca-RE treated sulfur-containing free-cutting steel is the eutectic phasesof MnS-RE_2S_3 and (Mn,Ca)S-RE_2S_3,respectively.The atomic ratio of RE/S needed to modify all theMnS into the eutectic phase is higher than 1.48 or 1.41-1.37 Ca/S,when RE or Ca-RE is used as the modifiz-er in the sulfur-containing free-cutting steel.Moreover,the thermodynamical calculation shows that theeutectic temperature is lower than the solidifying temperature,which is the key condition for the eutectic phase tokeep globual during solidifying.
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Experimental Study and Thermodynamical Calculation on the Formation of Eutectic Phase of MnS-RE_2S_3 and(Mn,Ca)S-RE_2S_3 in Sulfur-Containing Free-Cutting Steel |
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| Jiang Lai-Zhu Cui Kun.Experimental Study and Thermodynamical Calculation on the Formation of Eutectic Phase of MnS-RE_2S_3 and(Mn,Ca)S-RE_2S_3 in Sulfur-Containing Free-Cutting Steel[J].Journal of Rare Earths,1992(2). |
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| Authors: | Jiang Lai-Zhu Cui Kun |
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| Abstract: | The free-cutting phase in RE or Ca-RE treated sulfur-containing free-cutting steel is the eutectic phases of MnS-RE_2S_3 and (Mn,Ca)S-RE_2S_3,respectively.The atomic ratio of RE/S needed to modify all the MnS into the eutectic phase is higher than 1.48 or 1.41-1.37 Ca/S,when RE or Ca-RE is used as the modifiz- er in the sulfur-containing free-cutting steel.Moreover,the thermodynamical calculation shows that the eutectic temperature is lower than the solidifying temperature,which is the key condition for the eutectic phase to keep globual during solidifying. |
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| Keywords: | Free-cutting steel Eutectic phase Thermodynamical calculation |
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