Patent ID: 11891682
Assignee: THE JAPAN STEEL WORKS, LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. An iron-based sintered alloy which is used in a die and a cutter blade for a pelletizer of a resin extruder, the iron-based sintered alloy having a composition comprising, in terms of percent by mass, Ti: 18.4 to 24.6%, Mo: 2.8 to 6.6%, C: 4.7 to 7.0%, Cr: 7.5 to 10.0%, Ni: 4.5 to 6.5%, Co: 1.5 to 4.5%, Al: 0.6 to 1.0%, the balance being Fe and unavoidable impurities, and the iron-based sintered alloy having a structure in which hard particles are dispersed in a matrix,
wherein a coefficient of friction after passing through a conforming stage is 0.12 or less in a friction test in water by a cutter blade-on-disk method simulating a die and a cutter blade,
the maximum circle equivalent diameter of the hard particles is a predetermined value of 26.77 μm to 10 μm, and
the hard particles have a fine and relatively uniform shape and are homogenously dispersed over the whole matrix.