Abstract
The factors affecting the dimensional tolerance of powder injection molding (PIM), such as the selection of the powder and binder, the feedstock homogeneity, the feedstock thermal properties, the feedstock rheologic behavior, the debinding schedule and atmosphere and sintering temperature gradient were discussed. An attempt was made to develop a model to estimate the influence of important variables. The results show that a better understanding of these factors can provide some useful theoretical instructions for large scale production.
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LI Yi-min, HUANG Bai-yun, QU Xuan-hui. Improvement of rheological and shape retention properties of wax-based MIM binder by multi-polymer components[J]. Trans Nonferrous Met Soc China, 1999, 9(1): 22–29.
LI Yi-min, LIU Shao-jun, QU Xuan-hui, et al. Thermal debinding processing of 316L stainless steel powder injection molding compacts[J]. Journal of Materials Processing Technology, 2003, 137: 65–69.
Miura R, Takamori S. Effects of powder characteristics and debinding condition on deformation behavior of injection molded compacts during thermal debinding[A]. Injection Molding of Metals and Ceramics [C]. Princeton, NJ: Metals Industries Federation, 1997. 359–367.
Kulkarni K M. Dimensional precision of MIM parts under production conditions [J]. The International Journal of Powder Metallurgy, 1997, 33(4): 29–41.
LI Yi-min, QU Xuan-hui, HUANG Bai-yun, et al. Rheological properties of metal injection molding binder and feedstock[J]. Trans Nonferrous Met Soc China, 1997, 7(3): 103–107.
Kipphut C M, German R M. Powder selection for shape retention PIM[J]. The International Journal of Powder Metallurgy, 1991, 27(2): 117–124.
Wegmann M R, Olson E, Misiolek W Z. Dimensional control in powder injection molded Fe-2Ni [A]. Advances in Powder Metallurgy and Particular Materials [C]. Princeton, NJ: Metals Industries Federation, 1995. 133–142.
Japka J E. Hydrogen reduction of carbonyl ion powder weight loss relationships and MIM shrinkage [A]. Advances in Powder Metallurgy and Particular Materials [C]. Princeton NJ: Metal Powder Industries Federation, 1993. 143–152.
LI Yi-min, JIANG Feng, ZHAO Li-gang, et al. Critical thickness in binder removal process for injection molded compacts[J]. Materials Science and Engineering, 2003, A362: 292–299.
Peizhen K, John J. Effect of density gradients on dimensional tolerance during binder removal [J]. Journal of the American Ceramic Society, 2000, 83(10): 2536–2543.
WU Jun-lian. The Principle and Application of Surface Physical Chemistry [M]. Zhengjiang: Jiangsu Education Press, 1991, 78–90. (in Chinese)
CHEN Chuan-hui. Surface Physical Chemistry[M]. Beijing: Scientific and Technical Press, 1995, 27–38. (in Chinese)
ZHU Yao, ZHAO Zhen-guo. Interface Chemistry [M]. Beijing: Chemical Industry Press, 1996. 42–50. (in Chinese)
Tien Y, Shun T L. Effect of stearic acid on the injection molding of alumina[J]. Journal of American Ceramic Society, 1995, 78(10): 2746–2752.
Raman R, Slike W. Homogenity of mixed feedstock in PIM [A]. Advances in Powder Metallurgy and Particular Materials [C]. Princeton, NJ: Metal Powder Industries Federation, 1993. 1–16.
Heijman M J G W, Benes N E. Quantitative analysis of the micro structural homogeneity of zirconiatougheded[J]. Materials Research Bulletin, 2002, 37: 141–149.
Sunder V A, German R M. Modeling distortion during thermal debinding[A]. International Conference on the Powder Injection Molding of Metals and Ceramics[C]. PA: Innovative Material Solution Inc and The Pennsylvania State Univ, State College, 2000. 1–5.
Khalil K A, HUANG Bai-yun. Effect of thermo-mechanical properties PIM feedstock on compacts shape retention during process[J]. Trans Nonferrous Met Soc China, 2001, 11(4): 521–524.
Weaver T J, German R M. Achieving real dimensional control of ±0.1% [A]. Advances in Powder Metallurgy and Particular Materials [C]. Princeton, NJ: Metal Powder Industries Federation, 1996. 233–245.
Vetter R, Sunders M J. Wick debinding in powder injection molding [J]. The International Journal of Powder Metallurgy, 1994, 30(1): 115–121.
Zhang H, German R M, Bose A. Wick debinding distortion of injection molded powder compacts [J]. The International Journal of Powder Metallurgy, 1990, 26(3): 217–225.
Gaspervich J R, Drewes R C. Metal injection molding at advanced forming technology[J]. The International Journal of Powder Metallurgy, 1991, 27(2): 169–175.
Phillips M A, Streicher E L. Atmosphere process for the control of the carbon and oxygen contents of injection molded steel parts during debinding [A]. Injection Molding of Metals and Ceramic [C]. Princeton, NJ: Metals Industries Federation, 1997, 371–382.
White G R, German R M. Dimensional control of powder injection molded 316L stainless steel using insitu molding correction [A]. Advances in Powder Metallurgy and Particular Materials [C]. Princeton, NJ: Metal Powder Industries Federation, 1993. 121–132.
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Li, Ym., Lou, J. & Yue, Jl. Analysis and evaluation of effects of processing steps on dimensional tolerance of PIM parts. J Cent. South Univ. Technol. 12 (Suppl 1), 33–38 (2005). https://doi.org/10.1007/s11771-005-0367-4
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DOI: https://doi.org/10.1007/s11771-005-0367-4