The results show that the main causes of fracture is composition segregation and low strength resut from no quenching and tempering treatment 结果表明,产生断裂的主要原因是材料内部成分偏析及未按要求对材料进行调质处理导致材料的强度较低。
It emphasised the application of la - icp - ms in bulk analsysis and micro - zone analysis such as depth analysis , inclusion analysis and segregation analysis in metallurgical materials 着重介绍了整体分析和深度分析、表面夹杂物分析、偏析分析等微区分析方面的应用进展情况。
As the number of ag atoms increase , the average distance between the closest atoms in the cu13 - nagn clusters increased monotonously , and the average binding energy of the ground - states decreased monotonously 在cu _ ( 13 - n ) ag _ n团簇中并不表现出明显的偏析现象。原子间的平均距离单调增加,团簇的结合能单调减小。
Xps depth measurement suggested that the films were compositionally homogeneous along the growth direction ; that the interdiffusion between znsxse1 - x and ito was not serious in this deposition process ; and a sharp interface had developed Xps深度剖析显示所制备的薄膜,其内部成分均匀,无偏析和凝聚,界面清晰而陡峭,扩散不严重。
The research development of channel segregation ( freckle ) during solidification in multi - component systems is discussed , including the freckle characteristic , influencing factor and physical feature 摘要对多组元复杂体系(尤其是高温合金体系)在凝固过程中形成的通道偏析即黑斑的研究现状进行了评述,包括黑斑的存在方式、影响因素和物理特征等。
Spray deposition is a new kind of near - net shape metal forming technology which is used to manufacture rapid solidification advanced materials with the characteristics of uniform composition , high density , low oxygen tension and small degree of segregation 喷射沉积技术是制备快速凝固高性能材料的新型金属近成形技术,沉积坯件具有成分均匀、组织细化、致密度高、含氧量低、偏析程度小等特征。
Analysis which was based on the fracture mode of mould in wire - cutting processing , and the results show that the partial - quenched of mould , the non - uniformity of blank temperature and the carbide segregation inside the material are the main reasons of deformation and cracking 摘要通过分析在线切割加工中模具的破坏形式表明:模具不完全淬火、坯料温度的不均匀分布、材料内部的碳化物偏析是模具变形与开裂的主要原因。
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。
It was reported in this paper that in the aes analysis of aluminum alloy ingots by the photoelectric direct reading spectrometer , segregation of alloying elements , especially silicon in the alloy was observed , leading to deviation of analytical results obtained from different site of excitation 摘要在用光电直读光谱仪分析铭合金时,在不同激发点所取得的合金元素的测定结果,特别是硅的刚定值,之间存在明显偏差,并证实系由合金的偏析所引起。
In this paper , it is proposed as a new mechanism that when a solidifying billet is in the stirring zone during continuous casting of steel , a thin steel shell is formed in front of the freezing interface , which results in a white band with a negative segregation followed by a positive one 作者提出了一个新的机制来解释白亮带的形成原因,即正在凝固的连铸钢坯位于搅拌区时,在凝固前沿形成一个薄壳,由此导致先发生负偏析,紧随其后又发生正偏析的白亮带。