混合粉の粉末射出成形法により作製した18Ni系マルエージング鋼の焼結と強度に及ぼすTi添加量の影響 Effects of the Amount of Ti Addition on Sintering and Strength of 18Ni Maraging Steel Obtained by Powder Injection Molding Process Using a Mixture of Elemental Powders
The 18Ni maraging steel is prepared by powder injection molding (PIM) process using a mixture of elemental powders with much attention to the effects of the amount of Ti addition on the flexure strength. Titanium, one of the components of the maraging steel makes it possible to precipitate the Ni<SUB>3</SUB>Ti particles and to accelerate the precipitation of Ni<SUB>3</SUB>Mo in a martensitic matrix of the steel on aging. X-ray diffraction confirms that the homogeneous alloying of all elements was completed at a relatively low temperature of 1473K, nevertheless sintering temperatures over 1563K were needed to obtain the PIM compacts with more than 95% for the relative density. The high density and strength in the PIM maraging steel is obtained at the Ti addition of 1.0 mass%.
粉体および粉末冶金 53(10), 805-808, 2006-10-15
Japan Society of Powder and Powder Metallurgy