Global Patent Index - EP 0649914 A3

EP 0649914 A3 19951025 - An Fe-Mn vibration damping alloy steel and a method for making the same.

Title (en)

An Fe-Mn vibration damping alloy steel and a method for making the same.

Title (de)

Fe-Mn Stahl mit guten Schwingungsdämpfungseigenschaften und Verfahren zu dessen Herstellung.

Title (fr)

Acier de type Fe-Mn présentant d'excellentes propriétés d'amortissement de vibrations et procédure pour sa fabrication.

Publication

EP 0649914 A3 19951025 (EN)

Application

EP 94401992 A 19940907

Priority

KR 930021973 A 19931022

Abstract (en)

[origin: EP0649914A2] An Fe-Mn vibration damping alloy steel having a mixture structure of epsilon , alpha ' and gamma . The alloy steel consists of iron, manganese from 10 to 24 % by weight and limited amounts of impurities. The alloy steel is manufactured by preparing an ingot at a temperature of 1000 DEG C to 1300 DEG C for 12 to 40 hours to homogenize the ingot and hot-rolling the homogenized ingot to produce a rolled alloy bar or plate, performing solid solution treatment on the alloy steel at 900 DEG C to 1100 DEG C for 30 to 60 minutes, cooling the alloy steel by air or water, and cold-rolling the alloy steel at a reduction rate of below 30 % at around room temperature.

IPC 1-7

C22C 38/04

IPC 8 full level

C21D 6/00 (2006.01); C21D 8/00 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01)

CPC (source: EP KR)

C21D 6/005 (2013.01 - EP); C21D 8/005 (2013.01 - EP); C22C 38/04 (2013.01 - EP KR); C21D 2211/00 (2013.01 - EP); C21D 2211/008 (2013.01 - EP)

Citation (search report)

  • [A] WO 9000629 A1 19900125 - FAMCY STEEL CORP [US]
  • [PX] HAN, J.S., PARK, H.R., CHOI, C.S.: "Stress Induced Martensitic Transformation Behaviour of Fe-17Mn Alloy", TAEHAN KUMSOK HAKHOECHI, vol. 32, no. 2, DEP. METALL. ENG., YONSEI UNIV., SEOUL, KOREA, pages 240 - 245
  • [X] TOMOTA, Y., STRUM, M., MORRIS, J.: "The Relationship Between Toughness and Microstructure in Iron-High Manganese Binary Alloys", METALL. TRANS. A, vol. 18A, no. 6, FAC. ENG., IBARAKI UNIV., HITACHI, JP, pages 1073 - 81
  • [X] SCHUMANN, H.: "Crystallography of Martensitic epsilon alpha Lattice Transformation", KRIST. TECH., vol. 11, no. 6, WISSENSCHAFTSBER. WERKSTOFFKD., WILHELM-PIECK-UNIV., ROSTOCK, DDR, pages 663 - 671
  • [X] PATENT ABSTRACTS OF JAPAN vol. 18, no. 30 (C - 1153) 17 January 1994 (1994-01-17)
  • [A] BYCHIKHIN, G.A., GONCHARENKO, I.A., IL'IN, A.N., KALLISTRATOV, D.N., MARKOVA, G.V., SKURIKHIN, M.N.: "Effect of epsilon Phase Content on the Vibration Damping Properties of Powder Metallurgy Iron-Manganese Alloy", POROSHK. METALL. (KIEV), vol. 12, NPO'TULACHERMET', USSR, pages 52 - 55
  • [A] TAKAKI ET AL: "Effects of Austenite Grain Size on epsilon Martensitic Transformation in Fe-15%Mn Alloy", MATER. TRANS., JIM, vol. 34, no. 6, FAC. ENG., KYUSHU UNIV. FUKUOKA, 812, JP, pages 489 - 495

Designated contracting state (EPC)

AT DE FR GB SE

DOCDB simple family (publication)

EP 0649914 A2 19950426; EP 0649914 A3 19951025; EP 0649914 B1 19980304; AT E163687 T1 19980315; DE 69408773 D1 19980409; DE 69408773 T2 19980813; JP 2637371 B2 19970806; JP H07150300 A 19950613; KR 950011633 A 19950515; KR 960006453 B1 19960516

DOCDB simple family (application)

EP 94401992 A 19940907; AT 94401992 T 19940907; DE 69408773 T 19940907; JP 18832294 A 19940810; KR 930021973 A 19931022