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M I M |
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Metal injection molding (MIM) is a technology that combines the strengths of conventional powder metallurgy and plastic injection molding. It is the most cost-effective process in making small parts with complicated shapes. The debound and sintered parts could gain more than 95% density of conventional metal working parts.MIM Technology is suitable for small mechanical parts that require high complexity, high precision, high mechanical property and high productivity.
| Comparison of propertise between MIM and other processes |
| Character |
Machining |
P/M |
Invesatment
Casting |
MIM |
| Density |
100% |
< 95% |
100% |
> 95% |
| Mechanical Properties |
good |
fair |
fair |
good |
| Accuracy |
high |
high |
fair |
fair |
| Complexity |
high |
low |
fair |
high |
| Surface Roughness |
fine |
coarse |
fair |
fine |
| Plating Quality |
good |
poor |
good |
good |
| Productivity |
low |
high |
fair |
high |
| Production Cost |
high |
low |
fair |
fair |
| MIM
Process Advantage & Characteristic |
※ Cost Down |
| ※ A Variety of shape and design |
| ※ High Precision Control |
| ※ Applicable on various mixture of Alloy and special Metal |
| ※ Applicable on product with high complexity and high Precision |
| ※ High density and Strength |
| ※ Flexible Design |
| ※ Good surface finish for Polishing |
| Comparison of shaping capabilities between MIM and investment casting |
| Properties |
MIM |
Invesatment Casting |
| Min. Wall Thickness |
0.4 mm |
2 mm |
| Max. Wall Thickness |
10 mm |
Unlimited |
| Min. Bore Diameter |
0.4 mm |
2 mm |
| Tolerance at 14 mm Diameter |
+/- 0.06 mm |
+/- 0.2 mm |
| Surface Roughness Ra |
1 um |
5 um |
| Typical material composition and properties |
| Properties |
Fe-8% Ni |
Fe-50 Ni |
Fe-50 Co |
4650 * |
316L |
440C |
| g/cm3 |
7.6 |
7.7 |
7.7 |
7.5 |
> 7.6 |
> 7.5 |
Tensile Strength
( MPa ) |
450 |
455 |
205 |
1500 |
500 |
1600 |
Elongation
( % ) |
25 |
30 |
< 1.0 |
2 |
40 |
2 |
| Hardness |
Rb80 |
Rb50 |
Rb80 |
Max.HRc 55 |
HRb 70 |
Max.HRc 55 |
| C |
< 0.15 |
< 0.05 |
< 0.05 |
0.5 |
0.03 |
1 |
| Ni |
8 |
50 |
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2 |
11 |
0.6 |
| Mo |
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0.5 |
2.2 |
0.75 |
| Cr |
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17 |
17 |
| Cr |
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| Others |
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Co50 |
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1.4 Mn |
1.0 Mn |
| Fe |
Bal |
Bal |
Bal |
Bal |
Bal |
Bal |
* Heat treated
| Typical material composition and properties |
| Properties |
17-4PH* |
M2* |
Cu |
KOVAR |
Alloy-42 |
| g/cm3 |
7.6 |
>8.0 |
8.3 |
7.8 |
7.8 |
Tensile Strength
( MPa ) |
1200 |
1800 |
190 |
450 |
450 |
Elongation
( % ) |
4 |
0.5 |
25 |
25 |
25 |
| Hardness |
Max.HRc 38 |
Max.HRc 62 |
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HRb 50 |
HRb 50 |
| C |
< 0.05 |
0.9 |
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< 0.05 |
< 0.05 |
| Ni |
4 |
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29 |
42 |
| Mo |
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0.5 |
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| Cr |
17 |
4 |
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| Cr |
4 |
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| Others |
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2.0V |
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Co17 |
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| Fe |
Bal |
Bal |
Bal |
Bal |
Bal |
* Heat treated
| Dimemsional Tolerances for MIM |
| Dimemsion |
Standard Tolerance ( mm ) |
| 50.0 |
+/- 0.250 |
| 25.0 |
+/- 0.125 |
| 12.0 |
+/- 0.05 |
| 6.0 |
+/- 0.04 |
| 3.0 |
+/- 0.03 |
| 1.0 |
+/- 0.03 |
Sintering Alignment
【Back】 |
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© Copyright 2007 |
Taiwan
Sintered Metals Co., Ltd. |
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Taiwan Sintered
Metals Co., Ltd. |
(T):886-2-2268-2837 (F): 886-2-2269-4804 |
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All rights reserved. |
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1Fl., No. 25-1, Tzyh Chyang St., TuCheng
Dist., |
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New Taipei City, Taiwan, R.O.C. |
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E-Mail:sales@tsm.com.tw |
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