| 1. | The effect of solidification rate on eutectic microstructure of high chromium cast iron
凝固速度对高铬铸铁共晶组织的影响 |
| 2. | The experimentally measured minimum lamellar spacing is 65nm , which is larger than that of 7 . 4nm predicted by tmk model
实验中获得了间距为65nm的精细层片共晶组织。 |
| 3. | Influenced by the alternating current field , except that a little of eutectic iron - phase still is the acicular structure , the most of eutectic iron - phase of the al - 20si - 5fe - mn alloy is refined into tiny particles which is segregated
Al - 20si - 5fe - xti合金通过交流电场作用，共晶组织全部呈细小的颗粒状均匀分布于- al基体上。 |
| 4. | Under the conditions of low stress abrasion , eutectic composition is the optimal composition of high - cr white cast iron . the narrow intercarbide spacing is quite benefical to protect the austenitic matrix
摘要低应力磨料磨损条件下，高铬白口铸铁以共晶成分为宜，在细小的共晶组织中，碳化物间的短小空间对共晶奥氏体起到良好的保护作用。 |
| 5. | Because of the effect of sip porous skeleton , the primary si and the eutectic si were separated on the surface of sip porous skeleton under slow cooling conditions , and there were no typical eutectic microstructures in the al - alloys phase of the composites . 6
处于si相颗粒间隙的过共晶al - si合金液在缓慢冷却凝固时，初晶si和共晶si会附着在si多孔体骨架上析出，在最终的复合材料中没有典型的al - si共晶组织。 |
| 6. | When the undercooling goes beyond the coupled zone , it is found that the ( pb ) dendrites in the acoustically levitated drops can also appear in the top of the drops and the gravitational macrosegregation is effectively suppressed , which may be caused by the ultrasound and complicated fluid flow inside the drops
发现在小过冷范围内，由于超声波的搅拌作用层片共晶组织发生碎断现象；在大过冷情况下，超声波可以有效地抑制宏观偏析的发生。 |
| 7. | It is proved by quantitative analysis that with the content of titanium lower and tungsten higher in the alloy , the proportion of titanium to tungsten lowers little by little in the ( tiw ) c reforcement ; particles are smaller in size and more in quantity in 10vol % composites than in 20vol % one
在前一部分的研究基础之上，分析得出：在本实验条件下，当熔体的熔炼温度较低时，熔体中增强颗粒形成的数量少、尺寸大(黑心大) 、并有大量的共晶组织。 |
| 8. | The amount of nb3si / nb5si3 increases , their morphology tends to be more regular , their distribution becomes more homogeneously with the increasing of withdrawing rate . the microstructure is better oriented along the longitudinal axis of the samples when the withdrawing rate is between 0 . 6 and 6 . 0mm / min . at the same withdrawing rate , the microstructure changes from the beginning part to the ending part of the samples
铌?硅基rmics材料原始铸态组织由初生nb基固溶体和在其间分布的nb基固溶体+硅化铌共晶团组成；随着抽拉速率的增大，定向凝固共晶组织中硅化铌强化相细化、数量增多、分布趋于规则和均匀，定向效果显著；在相同抽拉速率条件下，区熔试样的组织从起始段到终止段发生了改变。 |
| 9. | Influenced by the alternating current field , all of the eutectic microstructure of al - 20si - 5fe - ti alloy changed into very small particles which is well - distributed on the base of a - al . electromagnetic stirring stimulates the forming of equiaxed crystal in al - 20si - 5fe - mn alloy . primary iron - phase is transformed from thick needle into smooth block
电磁搅拌促进al - 20si - 5fe - xmn合金中等轴晶的生成，初生富铁相由原来粗厚的片状物转化成比较圆整的块状，共晶组织中铁相主要以较短的针片状存在。 |
