【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 stainles
【机 构】
：
State Key Laboratory for Powder Metallurgy
论文部分内容阅读
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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