- 更多网络例句与缩孔金属相关的网络例句 [注：此内容来源于网络，仅供参考]
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Flange height and lip thickness are limited to the drawing ratio of the sheet metal in the convectional hole flanging process. Necking or fracture tends to occur before the required flange height being achieved which is unfavorable for subsequent assembly operations.
般金属板材在进行孔凸缘冲压成形时，凸缘高度和轴壁厚度通常受材料伸长率的限制，往往在未达所需凸缘高度前，板材即发生颈缩或破裂的现象，不利后续组装加工。
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It is proposed that the runner location should be first to be selected to ensure molten metal filling along the die wall in order to reduce melt flow resistance and then ingate should be located in the heavy section of the workpiece to which the melt would be filled at the beginning. As a result, the applied pressure could be transmitted fluently to avoid shrinkage cavity and to ensure castings quality.
指出浇道位置的选择首先要保证金属液沿着型壁顺序充填，以减少金属液的流动阻力；内浇道应使液态金属从制件厚壁处开始充填，以利压力的传递，消除缩孔，保证制件的质量。
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We also propose form the viewpoint of micromechanics the condition of instability of the microstructure of porous materials and apply it to the analysis of the internal void-necking fracture process.
同时本文还从细观力学的角度出发建立了含微孔材料连续介质微结构的失稳条件，并以此为基础对延性金属材料的微孔内颈缩断裂进行了分析。
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The hybrid mesoporous materials, PW11/SBA-15, were synthesized using tetraethoxysilane and lacunary polyoxometalate Na7PW11O39 (PW11) by a co-condensation approach in the presence of triblock copolymer EO20PO70EO20 (P123) as a template.
采用三嵌段共聚物EO20PO20(P123)为模板剂，正硅酸乙酯和缺位Keggin型多金属氧酸盐Na7PW11O39(PW11)为无机前驱体，由共缩合法一步合成了PW11/SBA-15介孔杂化材料。
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It has been found that its formation is caused by shrinkage cavity descending below thermal insulating sinkhead of ingot mould and silicate inclusion separating the metal of rail web.
通过低倍金相和扫描电镜观察及能谱分析，得出50kg／m钢轨轨腰分层缺陷是由于钢锭头部缩孔降到钢锭本体截口以下，硅酸盐夹杂物破坏钢轨轨腰金属连续性造成的。
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In addition, the forming reasons of entrapping poles and prejudicial shrinkage existing in the TiAl based alloy valves poured in permanent mould during the centrifugal casting process have been discussed.
此外，针对金属型离心浇铸Ti-48Al-2Cr-2Nb 合金汽车排气阀内部的常见缺陷，探讨了离心力场下排气阀内部卷入性气孔和偏中心线缩松的产生机理。
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Crack reasons for this are: the heating temperature is too high as a result of quenching or cooling in a hurry, the quality of thermal stress and metal volume changes in the organization of the anti-stress than the breaking strength of steel; the work of the original surface defects (such as surface micro-cracks or scratches) or the internal defect of steel (such as slag, serious non-metallic inclusions, white point, the residual cavity, etc.) formed in the quenching stress concentration; serious Decarburization and carbide surface segregation; parts after quenching Back lack of timely or tempering fire; processes in front of the stress caused by excessive cold red, forging folding, turning deep marks, sharp edges and corners, such as the oil groove.
造成这种裂纹的原因有：由于淬火加热温度过高或冷却太急，热应力和金属质量体积变化时的组织应力大于钢材的抗断裂强度；工作表面的原有缺陷或是钢材内部缺陷（如夹渣、严重的非金属夹杂物、白点、缩孔残余等）在淬火时形成应力集中；严重的表面脱碳和碳化物偏析；零件淬火后回火不足或未及时回火；前面工序造成的冷冲应力过大、锻造折叠、深的车削刀痕、油沟尖锐棱角等。
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Using the software, the velocity profile and temperature distribution when the molten metal filling a sheathing board casting with original gating system were numerically simulated, and the mechanism of shrinkage formation was analyzed.
将三维模拟软件应用于球磨机衬板件，采用工厂原有工艺方案，对金属液充填衬板件时的流场及温度场进行了数值模拟，分析了铸件中产生缩孔缺陷的原因。
- 更多网络解释与缩孔金属相关的网络解释 [注：此内容来源于网络，仅供参考]
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nugget：熔核
铸件在冷凝过程中收缩而产生的孔洞,形状不规则,孔壁粗糙,一般位于铸件的热节处. 压焊时,熔化金属在凝固过程中收缩而产生的、残留在熔核中的孔穴,亦称缩孔. 注:熔核(nugget)是电阻点焊、凸焊或缝焊时,在焊件贴合面上金属凝固后形成的金属核.