The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 1999
Filed:
Nov. 06, 1995
Gerhard Hackl, Kapfenberg, AT;
Gunter Hochortler, Kapfenberg, AT;
Bohler Edelstahl GmbH, Kapfenberg, AT;
Abstract
A process for making and using machine parts which in their function are exposed to severe stress from sliding superficial friction and machine parts produced thereby are described. The parts are made from an iron-based alloy which includes the following elements, in weight %: 0.35 to 1.0, preferably 0.4 to 0.8% C; up to 1.0% Si; up to 1.6%, preferably 0.3 to 1.4% Mn; 0.10 to 0.35, preferably 0.12 to 0.29% N; up to 1.0, preferably up to 0.8% Al; up to 2.8% Co; 14.0 to 25.0, preferably 16.0 to 19.0% Cr; 0.5 to 3.0, preferably 0.8 to 1.5% Mo; up to 3.0, preferably up to 1.5% Ni; 0.04 to 0.4, preferably 0.05 to 0.2% V; up to 3.0% W; up to 0.18% Nb; and up to 0.20% Ti. The total concentration of carbon and nitrogen results in a value of at least 0.5% and at most 1.2%, preferably at least 0.61% and at most 0.95%, with the remainder being iron and metallurgically required admixtures for the production of machine parts. Plunger pistons and piston rings of the above alloy, may optionally contain superficial hard layers, have especially advantageous usage properties.