Compound sleeve roll and method for producing same comprising ch

Details Compound sleeve roll and method for producing same comprising ch Compound sleeve roll and method for producing same comprising ch

1993-12-21

1995-04-04

Walsh, Donald P.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428553, 492 28, 419 8, 419 11, 419 14, 419 28, 419 49, B22F 704

Patent

active

054036704

ABSTRACT:
The crack-resistant compound sleeve roll having a shell portion made of a sintered alloy and a core portion made of steel is produced by (a) charging an alloy powder consisting essentially, by weight, of 1.0-3.5% of C, 2% or less of Si, 2% or less of Mn, 10% or less of Cr, 3.0-15.0% of W, 2.0-10.0% of Mo and 1.0-15.0% of V, the balance being substantially Fe and inevitable impurities, into a metal capsule disposed around a roll core; (b) after evacuation and sealing, subjecting the alloy powder to a HIP (hot isostatic pressing) treatment at 1100.degree.-1300.degree. C. to form a shell portion; (c) after removing the metal capsule, subjecting the sintered shell portion to a heat treatment having hardening at 1140.degree.-1220.degree. C. and annealing at 540.degree.-620.degree. C.; and (d) chamfering edge portions of the roll on both axial ends thereof such that a boundary of the shell portion and the core portion exists in a chamfered surface.

REFERENCES:
patent: 3718956 (1973-03-01), Sekimoto et al.
patent: 5053284 (1991-10-01), Noda et al.
patent: 5106576 (1992-04-01), Noda et al.

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