| Rheological, mechanical and corrosive properties of injection molded 17-4PH stainless steel |
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| 引用本文： | 李益民,K.A.Khalil,黄伯云. Rheological, mechanical and corrosive properties of injection molded 17-4PH stainless steel[J]. 中国有色金属学会会刊, 2004, 14(5): 934-939 |
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| 作者姓名： | 李益民 K.A.Khalil 黄伯云 |
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| 作者单位： | StateKeyLaboratoryforPowderMetallurgy,CentralSouthUniversity,Changsha410083,China |
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| 基金项目： | 国家高技术研究发展计划(863计划)，教育部霍英东教育基金，the Chinese National Excellent Dissertation Foundation |
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| 摘 要： | The feedstock based on the binder 65％PW-30％ EVA-5％SA has the best general rheological properties for the 17-4PH stainless steel powder. The 17-4PH stainless steel compacts sintered at 1380℃ for 90 min have the best mechanical properties and the good microstructure with homogeneously distributed pore structure and the moderate-sized grains. Whereas the compacts sintered for 60 min and 120 min show an inadequate and an over-sintered microstructure respectively. The compacts sintered at 1380℃ for 90 min have the density of 7.70 g/cm^3 , the strength of 1 275 MPa, the elongation of 5％, and hardness of HRC36. With the increase of sintering temperature, the density, strength and hardness increase, while the elongation decreases. The 17-4PH stainless steel has good corrosion resistance, showing an activation-passivation polarization curve. But the passivation potential range is narrow and the spot corrosion potential is low, indicating a low anti-spot corrosive properties.
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| 关 键 词： | 不锈钢 流变学 机械性能 耐腐蚀性 注模工艺 17-4PH |
Rheological,mechanical and corrosive properties of injection molded 17-4PH stainless steel |
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| K.A.Khalil. Rheological,mechanical and corrosive properties of injection molded 17-4PH stainless steel[J]. Transactions of Nonferrous Metals Society of China, 2004, 14(5): 934-939 |
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| Authors: | K.A.Khalil |
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| Abstract: | The feedstock based on the binder 65 % PW-30 % EVA-5 % SA has the best general rheological properties for the 17-4PH stainless steel powder. The 17 4PH stainless steel compacts sintered at 1 380 ℃ for 90 min have the best mechanical properties and the good microstructure with homogeneously distributed pore structure and the moderate-sized grains. Whereas the compacts sintered for 60 min and 120 min show an inadequate and an over sintered microstructure respectively. The compacts sintered at 1380 ℃ for 90 min have the density of 7. 70 g/cm3 , the strength of 1 275 MPa, the elongation of 5%, and hardness of HRC36. With the increase of sintering temperature, the density, strength and hardness increase, while the elongation decreases. The 17-4PH stainless steel has good corrosion resistance, showing an activation passivation polarization curve. But the passivation potential range is narrow and the spot corrosion potential is low, indicating a low anti-spot corrosive properties. |
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| Keywords: | metal injection molding(MIM) rheological properties mechanical properties corrosive resistance 17-4PH stainless steel |
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