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United States Patent | 5,720,830 |
Wragg , et al. | February 24, 1998 |
A method of making an engineering ferrous metal comprising the steps of adding to liquid engineering ferrous metal solid alloy carbide particles and thereafter permitting the ferrous metal to solidify. The alloy carbide particles are coated with iron or an iron alloy to allow wetting to occur between the powder and the liquid ferrous metal and the particles have a density which matches that of the ferrous metal to provide a uniform distribution of the carbide particles in the ferrous metal. A roll may be made having at least a shell made of metal by such a method by centrifugal casting or electroslag remelting.
Application Number | Filing Date | Patent Number | Issue Date | ||
436395 | May., 1995 | ||||
Nov 19, 1992 [GB] | 9224271.8 | |||
Jul 23, 1993 [GB] | 9315356.7 | |||
Current U.S. Class: | 148/326 ; 148/328; 148/539; 148/540; 148/541; 148/542; 148/543; 75/10.25; 75/10.6; 75/566 |
Current International Class: | B22F 1/02 (20060101); C22C 1/05 (20060101); C22C 1/10 (20060101); C21C 7/00 (20060101); C22C 038/04 (); C22C 038/08 (); C22C 038/00 () |
Field of Search: | 75/10.59,10.6,10.61,566,10.25,312 148/543,542,538,540,329,324,321,326,328 |
3885956 | May 1975 | Obst et al. |
5023145 | June 1991 | Lomax et al. |
58-213813 | Dec., 1983 | JP | |||
WO93/03192 | Feb., 1993 | WO | |||