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:
May. 23, 1978
Filed:
Oct. 26, 1976
Applicant:
Inventors:
Jan Robert Tengzelius, Viken, SW;
Per Folke Lindskog, 263 00 Hoganas, SW;
Lars-Erik Svensson, 263 00 Hoganas, SW;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
75 / ; 75 / ; 75 / ; 75251 ; 75252 ;
Abstract
A phosphorus steel powder for manufacturing sintered details having an extremely small tendency to brittleness ruptures consists of iron or steel powder substantially free from phosphorus, mixed with a phosphorus powder containing in all less than 4% impurities which are at the sintering temperature more easily oxidized than the main components iron and phosphorus. The iron-ferrophosphorus mixture is heated with or without the addition of oil in reducing atmosphere to a temperature of between 65.degree. and 900.degree. C for a period of 15 minutes to 2 hours to improve the protection against segregation.