(19)

(11)

EP 0 912 289 A1

(12)

(43) Date of publication: 06.05.1999 Bulletin 1999/18 (21) Application number: 97928579.0 (22) Date of filing: 11.06.1997

(51) International Patent Classification (IPC):  B23K 20/ 12( . ) C22C 38/ 00( . ) E21B 17/ 00( . ) B28D 1/ 14( . ) C22C 38/ 50( . ) (86) International application number: PCT/SE1997/001013 (87) International publication number: WO 1997/049520 (31.12.1997 Gazette 1998/05)

(84) Designated Contracting States: AT DE FI FR GB IE SE (30) Priority: 24.06.1996 SE 19960002480 (71) Applicant: Sandvik Aktiebolag (publ) 811 81 Sandviken (SE)	(72) Inventor: LUNDELL, Lars-Gunnar S-811 52 Sandviken (SE)