1) segregation
[英][,seɡrɪ'ɡeɪʃn] [美]['sɛgrɪ'geʃən]
共晶偏析
1.
Effect of Microsegregation on Mechanical Properties of ZL205A Casting Aluminum Alloy;
显微共晶偏析对ZL205A合金力学性能的影响
2) in-situ monotectic composite
偏晶共生
3) microsegregation
枝晶偏析
1.
With the help of high temperature-gradient directional solidification equipment (HGDS), the microstructure and microsegregation of Ni-base single crystal superalloy CMSX-2 solidified at the cooling rates from below 1 K/s to 20 K/s were investigated.
实验发现采用高梯度定向凝固技术可以得到具有超细枝晶组织的单晶高温合金材料，枝晶偏析在低速生长时随冷却速率的增加而增加，而在高速生长时形成的超细枝晶组织中，枝晶偏析随冷却速率的增加而减小。
2.
The dendritic arm spacings and microsegregations of directionally solidified superalloy DZ22 at various solidification rates have been studied with the help of a ZMLMC directional solidification equipment.
采用新研制的超高梯度定向凝固装置，研究了不同凝固速率下定向凝固高温合金ＤＺ２２的枝晶臂间距和枝晶偏析。
4) dendrite segregation
枝晶偏析
1.
The results show that FGH95 alloy ingot exists serious dendrite segregation,dendrite segregation is eliminated when microstructure and composition are homogenized after 1170 ℃×20h or isothermal compression of 70% at 1150 ℃.
结果表明:FGH95合金铸锭存在严重的枝晶偏析,经1170℃×20h均匀化处理或在1150℃等温压缩70%后,合金铸锭的组织和成分达到均匀化,铸锭内的枝晶偏析得以消除,并且1150℃等温压缩70%工艺比1170℃×20h工艺所得的组织更加细小,晶粒平均尺寸约为85。
2.
In view of generality and importance of effects of dendrite segregation on structures and properties of casted alloy materials, accurate mathematical models of diffusion homogenization of dendrite segregation must be set up,thus parameters of physico-metallurgical quality control can be found.
鉴于枝晶偏析对熔铸材料组织和性能影响的普遍性与重要性，需要建立准确的枝晶偏析扩散均匀化数学模型，以便找出冶金质量控制参数。
3.
The results show that there were dendrite segregation,shrinkage and non-normal coarse bainite microstructure defects in the workpiece,which indicated that the metallurgical quality of the raw materials of the gear shaft was poor and these defects still had not been eliminated after forging.
结果表明:工件内部存在枝晶偏析、类孔隙性缩松等缺陷和非正常粗大的贝氏体网状组织,说明该齿轮轴原材料冶金质量差,虽然经过锻造但仍没有被消除,同时非正常组织的存在导致材料组织不均匀性进一步加大,这些都会大大恶化钢材的工艺性能和机械性能,结合裂纹形态可以认为该齿轮轴裂纹的产生主要由原材料缺陷等因素造成。
5) grain boundary segregation
晶界偏析
1.
Based on the theory of grain boundary segregation, the impurity phosphorus in 225Cr1Mo steel which is widely used for hydrogenation reactors was chosen to study the kinetics of temper embrittlement.
基于晶界偏析理论,以广泛应用于加氢反应器的材料2 25Cr 1Mo钢为研究对象,以2 25Cr 1Mo钢中杂质元素P的晶界偏析为基础,研究加氢反应器回火脆化动力学,建立加氢反应器长期使用过程中产生回火脆化动力学模型(混合模型),为在役加氢反应器材料损伤的研究以及寿命预测提供理论基础。
2.
The characteristics of grain boundary segregation of Mg in Al alloy and its effects on the grain boundary properties have been simulated by computer based on the embedded atom method.
结果表明 ,Mg的晶界偏析具有自发性 ,并且降低基体的电荷密度和空位形成能 ,从而导致晶界脆化。
3.
The model of grain boundary segregation and intergranular fracture for a trinary alloy was proposed in this paper.
提出了一个三元合金晶界偏析与沿晶断裂模型，并将该模型与准化学理论相结合，研究了高强铝合金Mg、H晶界偏析对沿晶断裂功的影响。
6) dendritic segregation
枝晶偏析
1.
The results show that the addition of micro rare earth elements to low alloy tool steel can decreases relative content of gross carbide, improve the dispersion, refine the austenite grain and reduce the dendritic segregation of chromium.
结果表明：微量稀土的加入，可减少粗大碳化物的相对量，改善其分布状况，细化奥氏体晶粒，减少铬的枝晶偏析。
补充资料：颗粒偏析
分子式：
CAS号：
性质：又称颗粒偏析。松散状物料中的粗细颗粒发生分离而各自聚集的现象。在运输、卸料和堆放等过程中，由于松散状物料中不同颗粒之间的密度、比表面积和表面光滑度等的差别，当物料卸入料仓时，粗细颗粒就开始分层，细粉集中在卸料口的中央，粗粒则滚到周边。从而造成偏析现象。由于颗粒偏析，破坏了泥料的混合均匀性，并影响成形操作和坯体、制品的结构，降低了耐火制品的质量。为了减少粒度偏析现象，可采用按粒度分级贮存，多料仓配料，保持料仓内物料在2/3容积以上，增加注料口，以减少加料时料仓内的分层现象。
CAS号：
性质：又称颗粒偏析。松散状物料中的粗细颗粒发生分离而各自聚集的现象。在运输、卸料和堆放等过程中，由于松散状物料中不同颗粒之间的密度、比表面积和表面光滑度等的差别，当物料卸入料仓时，粗细颗粒就开始分层，细粉集中在卸料口的中央，粗粒则滚到周边。从而造成偏析现象。由于颗粒偏析，破坏了泥料的混合均匀性，并影响成形操作和坯体、制品的结构，降低了耐火制品的质量。为了减少粒度偏析现象，可采用按粒度分级贮存，多料仓配料，保持料仓内物料在2/3容积以上，增加注料口，以减少加料时料仓内的分层现象。
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参考词条