Research question
Because of we young generation all like digital products. And most famous digital product now is Iphone. We also interest in a similar product OMINA2. But when we read news, we find out that Iphone’s sales are much better than OMINA2. If you see their hardware, you will find OMINA2 is better than Iphone. And Samsung is Korean brand. It is seems like OMINA2 is more competitive
of 800*800mm2 in cross-sectional area and 1800mm in depth.
V-shaped promoter were located on the test surface 1200mm downstream from the plate edge.
*Measurements
Promoter : the length of the side B, the height H, the attack angle α
B=20mm(fixed) / H=2.5,5,10,20 and 30 mm / α=180,150,120,90,60 and 30 degrees)
2-3. Results & Discussion
When α=90° and H=10 mm is the optimal condition.
area (b) and (c)
Element (b) (c)
Weight% Atomic% Weight% Atomic%
O K 28.36 58.01 26.43 55.50
Fe K 71.64 41.99 47.73 28.71
Mn K - - 25.84 15.80
Totals 100.00 - 100.00 -
표2를 보면 (b)의 부분에서는 망간 성분이 없으므로 이는 XRD와 비교하여 보았을 때 Fe2O3라는 것을 알 수 있으며, 스케일이 떨어진 부분에 대해서 Mn이 포함되어 있으므
of products made by sectioning off extrusions. Source: Courtesy of Kaiser Aluminum.
Types of Extrusion
Figure 15.3 Types of extrusion: (a) indirect; (b) hydrostatic; (c) lateral;
Process Variables in Direct Extrusion
Figure 15.4 Process variables in direct extrusion. The die angle, reduction in cross-section, extrusion speed, billet temperature, and lubrication all affect the extrusion pressure.