| 硅和磷对铁素体可锻铸铁回火脆性的影响 |
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| 引用本文： | 张利华,陈永民.硅和磷对铁素体可锻铸铁回火脆性的影响[J].昆明理工大学学报(理工版),1991(6). |
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| 作者姓名： | 张利华 陈永民 |
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| 作者单位： | 昆明工学院基础部，云南省政协 |
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| 摘 要： | 本文对不同的硅、磷含量及不同的热处理条件下的铁素体可锻铸铁试样,测试了其冲击韧性和显微硬度,根据其变化规律阐明了硅和磷对铁素体可锻铁回火脆性的影响.同时利用扫描电镜、电子探针等显微分析方法研究了具有回火脆性试样的显微组织,以及因冷却速度变化引起硅、磷的晶界偏析与回火脆性的关系;并对试验过程中发现具有回火脆性试样中部分铁素体晶界变为“双晶界”这一特殊现象,作了比较深入的探讨.
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| 关 键 词： | 可锻铸铁 回火脆性 晶界偏析 |
Effect of Silicon and Phosphorous on the Temper Brittleness of Ferritic Malleable Cast Ieon |
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| Zhang Lihua.Effect of Silicon and Phosphorous on the Temper Brittleness of Ferritic Malleable Cast Ieon[J].Journal of Kunming University of Science and Technology(Natural Science Edition),1991(6). |
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| Authors: | Zhang Lihua |
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| Affiliation: | Zhang Lihua (Department of Basic Sciences)
Chen Yongming (Yunnan Province C.P.P.C.C.) |
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| Abstract: | In this paper,the Charpy impact and microhardness have been measured of ferritic malleable cast iron samples with different content of silicon and phosphorous and different heat treatment.According to its change regulation,the effect of silicon and phosphorous on the temper brittleness is stated.At the same time,the microstru- cture of the embrittled samples has been studied with the aid of SEM and EMPA, and the relationship between grain-boundary segregation of silicon,phosphrous and temper brittleness caused by cooling rate change has been analysed.The phenomenon in the course of experiments is discovered and analysed in details,in which the str- ucture of ferritic grain boundaries is changed,and some boundaries are turned into dualgrain of embrittled samples. |
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