EP 1304393 A1 20030423 - PISTON RING EXCELLENT IN RESISTANCE TO SCUFFING, CRACKING AND FATIGUE AND METHOD FOR PRODUCING THE SAME, AND COMBINATION OF PISTON RING AND CYLINDER BLOCK
Title (en)
PISTON RING EXCELLENT IN RESISTANCE TO SCUFFING, CRACKING AND FATIGUE AND METHOD FOR PRODUCING THE SAME, AND COMBINATION OF PISTON RING AND CYLINDER BLOCK
Title (de)
KOLBENRING MIT AUSGEZEICHNETER BESTÄNDIGKEIT GEGEN REIBUNG, RISSBILDUNG UND ERMÜDUNG UND HERSTELLUNGSVERFAHREN DAFÜR UND KOMBINATION VON KOLBENRIING UND ZYLINDERBLOCK
Title (fr)
SEGMENT DE PISTON PRESENTANT UNE RESISTANCE ELEVEE A L'EROSION, A LA FISSURATION ET A LA FATIGUE, PROCEDE PERMETTANT DE PRODUIRE CE SEGMENT ET COMBINAISON SEGMENT DE PISTON ET BLOC-CYLINDRES
Publication
Application
Priority
- JP 0106127 W 20010716
- JP 2000216255 A 20000717
Abstract (en)
A piston ring having improved scuffing resistance, cracking resistance and fatigue resistance, consists of a high-chromium martensitic stainless steel and a sliding nitriding layer formed on the surface of said steel. The stainless steel consists of C: 0.3 to 1.0%; Cr: 14.0 to 21.0%, N: 0.05 to 0.50%, at least one of Mo, V, W and Nb: 0.03 to 3.0% in total, Si: 0.1 to 1.0%, Mn 0.1 to 1.0%, P: 0.05% or less, S: 0.05% or less, the balance being Fe and unavoidable impurities. The sliding nitriding layer comprises on its surface hard particles mainly consisting of nitrides in a range of from 0.2 to 2.0 mu m of average particle size, 7 mu m or less of the longest diameter, and from 5 to 30% in area ratio. <IMAGE>
IPC 1-7
IPC 8 full level
F02F 5/00 (2006.01); C21D 8/06 (2006.01); C21D 9/40 (2006.01); C21D 9/52 (2006.01); C22C 38/00 (2006.01); C22C 38/18 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/60 (2006.01); C23C 8/26 (2006.01); F16J 9/26 (2006.01)
CPC (source: EP KR US)
C21D 8/065 (2013.01 - EP US); C21D 9/40 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/18 (2013.01 - EP KR US); C22C 38/22 (2013.01 - EP US); C22C 38/24 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C23C 8/26 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB
DOCDB simple family (publication)
EP 1304393 A1 20030423; EP 1304393 A4 20050803; EP 1304393 B1 20060809; AR 029730 A1 20030710; BR 0112573 A 20030701; BR 0112573 B1 20090113; CN 1210427 C 20050713; CN 1458983 A 20031126; DE 60122164 D1 20060921; DE 60122164 T2 20071011; JP 2002030394 A 20020131; JP 4724275 B2 20110713; KR 100507424 B1 20050810; KR 20030025275 A 20030328; TW 521093 B 20030221; US 2004040631 A1 20040304; US 2007187002 A1 20070816; WO 0206546 A1 20020124
DOCDB simple family (application)
EP 01949987 A 20010716; AR P010103377 A 20010716; BR 0112573 A 20010716; CN 01815763 A 20010716; DE 60122164 T 20010716; JP 0106127 W 20010716; JP 2000216255 A 20000717; KR 20037000751 A 20030117; TW 90117357 A 20010716; US 33332603 A 20030617; US 65701507 A 20070124