B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
B28B 17/00 (2006.01) B23D 57/02 (2006.01) B27B 17/02 (2006.01) C21D 8/06 (2006.01) C22F 1/10 (2006.01)
Patent
CA 2113532
A B S T R A C T This method serves for the production of a slideway-type guide for driven chains, eg cutting-chains. A running surface made of wear-resistant hard alloy is applied to the slideway of the guide. A blank in bar form with a dentritic structure, made from said alloy, is produced to form the running surface, a suction casting process being used in particular for this purpose. The blank is treated with high pressure at a high temperature. This method is known as hot isostatic pressing. This is followed by an annealing process over a number of hours, at the end of which the structure of the alloy is so altered that the previously acicular and to-some- extent skeletally-joined carbides are dispersed and converted to rounded, to some extent spheroidal bodies which are densely and evenly distributed throughout the alloy. The alloy thereby becomes highly wear-resistant. The bars are then shaped so as to fit onto the slideway, and are bonded rigidly thereto.
Bartmann Udo
Stehle Hans Peter
Fetherstonhaugh & Co.
Stihl Andreas
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