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试验资料表明,粉未被熔体浸润的浸润角从>90°,变至<90°。出现从不浸润过度为浸润,取决于接触条件 t°(温度)、P(压力)、Cosθ(接触角)等等,存在着一个使浸透深度最大的适宜的粉末尺寸。在所有的粉末尺寸和外压力下,在相同的时间间隔内钢的浸透深度大于铸铁(图7)。φχ003粉末尺寸对钢的过滤影响微弱,在低的外压力下,(P=25毫米水银柱)粒度0.315—0.4毫米的φχ003膏剂出现最大的浸透深度.进一步粗化膏剂粉末使毛细位能减少,其影响大于流体阻力的降抵。在高压力下过滤时,流体的阻力影响显著,故粗粒膏剂的浸透较深。
Experimental data show that the wetting infiltration angle of the powder is changed from> 90 ° to <90 °. The occurrence of infiltration from infiltration to infiltration, depending on the contact conditions t ° (temperature), P (pressure), cos θ (contact angle) and so on, there is a suitable depth of the penetration of the powder size. At all powder sizes and pressures, the depth of penetration of the steel was greater for the same time interval than cast iron (Figure 7). The effect of the size of φχ003 powder on the filtration of the steel was weak, and the maximum penetration depth of φχ003 with particle size of 0.315-0.4 mm (P = 25mmHg) was obtained under low external pressure.Copper powder was further roughened to reduce the capillary position, Its impact is greater than the drop of fluid resistance. Under high pressure filtration, the fluid resistance significant impact, so coarse ointment penetration deeper.