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Recent study on the subject is an indirect approach: in order to compute the Gabor coefficients, one needs to find an auxiliary bi-orthogonal window function γ.
      
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The present paper is the first part of a study on the improvement of the quality of ball-

本文是提高滚珠轴承钢质量研究工作的第一部分。研究了碱性电弧炉内不同脱氧制度和浇铸条件对于钢中非金属夹杂物类型和数量的影响设及冶炼和浇铸过程中夹杂物的变化。试验结果指出,采用下列操作制度可以显著改善滚珠钢中非金属夹杂物: 扒氧化渣后用硅锰合金预脱氧,然后用电石直接造电石渣,保持40分钟以上,还原后期用硅铁粉或电石继续进行扩散脱氧,出钢前炉渣必须变白,采用先出渣后出钢的办法,使渣钢在盛钢桶内得到很好的混合,进一步改善钢中非金属夹杂物。加铝量应在0.5公斤/吨以上。结果证实,使用焦油处理过的优质盛钢桶内衬砝和汤道砝可以减少外来夹杂物。钢中氮化钛的来源是铁合金中含钛,所以在冶炼优质滚珠钢时应该选用不含钛的铁合金。

In the prsent paper some of the results of our studies on the formation of cube texture in an iron silicon alloy with silicon content of 3.25% are described. It is found that cube texture in this alloy can be developed either by the process of secondary recrystallization or simply by the process of primary recrystallization. In case of the formation of cube texture by the former process no nucleation process is involved. Nuclei of the (100) [001] orientation are already present after the completion of...

In the prsent paper some of the results of our studies on the formation of cube texture in an iron silicon alloy with silicon content of 3.25% are described. It is found that cube texture in this alloy can be developed either by the process of secondary recrystallization or simply by the process of primary recrystallization. In case of the formation of cube texture by the former process no nucleation process is involved. Nuclei of the (100) [001] orientation are already present after the completion of primary recrystallization, and are surrounded, for most cases, by grains having (110) [001] orientations. Exaggerated growth of cube-oriented grains takes place when the normal growth of other grains are restricted. In case of the formation of a cube texture by primary recrystallization, a spread of cold-rolled cube texture must be present after the last step of cold rolling. Upon final annealing at a low temperature, a recrystallized cube texture by the process of "recrystallization-in-situ" is obtained. The cube texture may be further concentrated with an increase of final annealing temperature.

铁硅合金(含硅3.25%)的样品,经过不同的冷轧和中间退火程序,在最后高温退火时,可以通过二次再结晶,或者一次再结晶形成集中的立方织构。通过二次再结晶形成立方织构时,并不包括重新形核的过程。(100)取向的二次再结晶“晶核”,在一次再结晶完成后,就已经存在。通过一次再结晶形成的立方织构,由于样品在冷轧后,得到了较强的加工立方织构,退火时通过同位再结晶,就得到了再结晶立方织构。

Previous studies on aluminum and aluminum-copper alloys have shown that the change of energy loss (△E) under fatigue loading can be divided into two stages. The first stage corresponds to the pinning of dislocations and the rise of △E in the second stage is associated with the occurrence of localized slip regions in the specimen. In order to confirm this viewpoint, torsional fatigue experiments were carried out on aluminum-magnesium alloys containing 0.52, 0.91, 3.46 and 5.15% of magnesium, and the area...

Previous studies on aluminum and aluminum-copper alloys have shown that the change of energy loss (△E) under fatigue loading can be divided into two stages. The first stage corresponds to the pinning of dislocations and the rise of △E in the second stage is associated with the occurrence of localized slip regions in the specimen. In order to confirm this viewpoint, torsional fatigue experiments were carried out on aluminum-magnesium alloys containing 0.52, 0.91, 3.46 and 5.15% of magnesium, and the area of the hysteresis loop (stress versus strain) after various stress cycles N was determined, from which the energy loss △E in each cycle was calculated. Results of metallographic observations on the specimen surface after various stress cycles show that for all the alloys used, the change of slip marks exhibits two distinctly different stages. In the first stage, several systems of fine and straight slip lines are often observed, and the slip lines are found to be distributed uniformly over a grain. In the second stage, some of these slip lines are thickened up to form localized slip regions. In general, such localized slip regions occur earlier in alloys with lower magnesium contents (0.52, 0.91%) and under higher applied maximum torsion strains.

过去关于铝和铝铜合金的研究工作指出,在疲劳载荷过程中的能量消耗(△E)所发生的变化可以分成两个不同的阶段。第一阶段相当于位错的被钉札,在第二阶段里△E的再上升则表示已有粗滑移区出现。为了进一步验证这种看法,在本文中用含镁量为0.52,0.91,3.46和5.15%的铝合金进行了扭转疲劳试验,测定了经过各种应力循环数N以后的滞后迴线的面积,从而算出在每次循环中的能量消耗△E。在疲劳载荷经过不同循环数后,试样表面进行金相观测的结果指出,对于所用的合金而言,滑移痕迹的变化都表现出两个明显不同的阶段。在第一阶段里,常常观察到几组细而直的滑移线均匀分布在一个晶粒内。在第二阶段里,某一组滑移线变得集中而粗化成簇。一般而言,在镁含量较低(0.52,0.91%)的合金里,以及当扭应变较大时,粗滑移区出现得较早。 将所观察到的△E-N曲线的变化与粗滑移区的出现做了比较,并且考虑到在疲劳载荷过程中第一阶段和第二阶段的△E可能发生重迭的情况,指出了试样里出现粗滑移区可以引起△E在疲劳后期的再上升。这与过去关于铝和铝铜合金所得结果相合。 本文还讨论了位错在疲劳载荷第一阶段里被溶质原子气团所钉札的状态与粗滑移区的随后形成的联系。

 
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