【摘要】 研究了水雾化铁粉,316L不锈钢粉及五种在不锈钢粉中分别加入10%WC、10%TiC、10%NbC、10%Al2O3、10%Si3N4的复合粉的直热式温压规律;探讨了相同电流对不同粉末材料压坯的密度和电阻的影响及在不同粉末中产生的热效应,并对其进行了初步理论分析。结果表明:与冷(室温)压相比,采用直热式温压技术可使铁粉、316L不锈钢粉及其五种复合粉压坯的相对密度提高大于0.76%,电阻降低大于21.3%,且颗粒间产生焊接,促进了压坯致密化;而加入10%陶瓷粉末的不锈钢复合材料则受电流影响不大。更多还原

【Abstract】 A series of experiments are conducted respectively on water atomization Fe powder, 316L stainless steel powder, and five kind of mixed powders prepared by adding 10%WC, 10%TiC, 10%NbC, 10%Al₂O₃, 10%Si₃N₄ respectively into 316L stainless steel powders, of which the function law of warn-compaction by using directly electric Jole heating technology have been investigated. The influences of identical current on blank densities, resistances and heating effects are explored. Preliminarily theoretical analyses are also carried out. The results show that the electric Jole heat warm-compaction of Fe powder, 316L stainless steel powder and those with 10% carbides additions can increase green densities by more than 0.76% and decrease the electric resistances by more than 21.3%. Moreover, inter-particle contact resistance favors welding at the particle interfaces, which accelerates densification during compaction. While the current has little effect on 316L stainless steel powder with 10% ceramic powder additions.更多还原