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Enhanced Properties of Extra-fine Nickel Steels for PM Gears
Stephenson Thomas F.,Korotkin Maria,Metcalfe Shawn 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Highly compressible Ni-Mo steels are attractive materials for PM due to high sinter density and ease of processing. Extra-fine Ni admixed PM steels have demonstrated improved mechanical properties and rolling contact fatigue resistance due to a more uniform microstructure and increased Ni diffusion during sintering. Sinter densities of single press single sinter XF Ni-Mo steels can approach at moderate compaction pressures. Leaner alloys based on extra-fine Ni powder are possible depending on the performance requirements of the PM steel part. Extra-fine Ni steels are particularly attractive for the growing market of high performance PM gears and sprockets.
Extra-fine Ni Powder for Diamond Tool Binder Applications
Stephenson Thomas F.,Korotkin Maria,Metcalfe Shawn 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
A new extra-fine grade Ni powder (XF Ni) has demonstrated increased sintering activity in Co-Fe-Ni binders for diamond tool applications. XF Ni has the advantage of significantly lower cost than XF Co. Up to 30% of XF Co was substituted with XF Ni while maintaining comparable apparent hardness and transverse rupture strength to pure Co binders. Ni substantially increased the diffusion of Fe. Diamond tool producers can take advantage of the improved sintering properties of XF Ni powder to substantially lower material costs.