公开(公告)号：SE366728B

公开(公告)日：1974-05-06

申请号：SE1205372

申请日：1972-09-19

Applicant: ASEA AB

Inventor： ADLERBORN J ,  ISAKSSON S ,  LARKER H

IPC: C04B35/56 ,  C04B35/563 ,  C04B35/58 ,  C04B35/583 ,  C04B35/645

公开(公告)号：SE363957B

公开(公告)日：1974-02-04

申请号：SE778172

申请日：1972-06-13

Applicant: ASEA AB

Inventor： ISAKSSON S ,  LARKER H ,  LINDBERG M

IPC: F27B17/00 ,  B22F3/15 ,  H05B3/62

Abstract: In a cylindrical elongated furnace for treating material at high temperature in a gaseous atmosphere under high pressure, the furnace chamber is insulated from the walls of the pressure chamber by at least three tubular parts arranged one inside the other with insulating parts. At least one ring is provided attached to one of the tubular parts and having a downwardly and inwardly sloping similar part secured to the inside of this part and directed towards, but terminating short of, the opposed part.

公开(公告)号：SE357213B

公开(公告)日：1973-06-18

申请号：SE1313871

申请日：1971-10-18

Applicant: ASEA AB

Inventor： ISAKSSON S

IPC: B22F3/14 ,  B22F3/15 ,  B30B11/00 ,  C22C33/02 ,  F27B17/00 ,  B22F3/04

Abstract: In a procedure in which a body formed of an iron-based alloy is manufactured from powder by isostatic compression, the powder is placed in a flexible container and subjected to isostatic pressure and heat. The isostatic hot pressing is carried out at two temperatures, at one of which the iron-based alloy is at least 25 percent in alpha -phase and at the other of which the iron-based alloy is in gamma -phase. If the treatment at the temperature for gamma -phase is carried out first, the body is cooled below the temperature level at which it is at least 25 percent in alpha -phase to prevent retention of the gamma -phase and then raised to the temperature at which it is at least 25 percent in alpha -phase.