After analysing the flight, cooling and undercooled solidification of multistage atomized droplets, this paper adopts Newtonial cooling, highly undercooled heterogeneous nucleation and steadystate continuous growth model to calculate and simulate numerically the thermal history of droplets and effect of main atomization process parameters during multistage atomization. The results indicated that large undercooling occur mainly during later stage of multistage atomization while recalescence and rapid quenching occur mainly during forced cooling stage.

在分析多級霧化過程霧化微滴的飛行冷卻和過冷凝固特點及規(guī)律的基礎(chǔ)上欧美另内潮喷XXXX，本文采用了牛頓冷卻、大過冷非均勻形核及穩(wěn)態(tài)連續(xù)生長模型国产特黄大片美女精品，對純鋁多級霧化過程中微滴熱歷史以及主要霧化工藝參數(shù)對其的影響作用進(jìn)行了數(shù)值分析和計算在线免费性网站，結(jié)果表明：大過冷主要是在多級霧化后期形成的，再輝和急冷則主要發(fā)生在強(qiáng)制冷卻階段国产欧美日韩精品一卡。

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XRD, 29Si, 27AI MAS NMR, the adsorption of nitrogen at low temperature,129Xe NMR, XPS, IR-TPD, NH3-TPD, the high vacuum volumetric analysis and pulse flow microreaction were used to study the difference in structure and property between the US-SSY zeolites obtained by quick and slow cooling after treating SSY zeolite with steam at high temperature.

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Analyzing the dynamic behavior of dislocations in the deformed metal at high temperature and high strain rate, a new theoretical model of dislocation dynamic behavior is put forward to describe the dynamic recrystallisation mechanism of the weld metal.

采用本文首次提出的測量摩擦界面溫度的半自然熱電偶測溫法，并結(jié)合焊接過程中的急冷凝結(jié)組織分析好看的久久黄网站、微區(qū)應(yīng)變速率分析国产无套粉嫩白浆在线观看麻豆，以及摩擦扭矩測量等相關(guān)實驗方法，測定了焊接過程中焊合區(qū)金屬的組織及相應(yīng)的熱變形參數(shù)色库视频91。