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Hot Swaging of Sintered Iron

IP.com Disclosure Number: IPCOM000098847D
Original Publication Date: 1958-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Hermann, KE: AUTHOR [+3]

Abstract

Recent tests indicate that the hot swaging of iron phosphorous powdered metal tends to form a material comparable to low alloy steel. The tests were run with iron alloys containing phosphorous ranging from .0 to .6 percent of phosphorous. The best results were noted from a Plast iron B212 which is carbon free, reduced iron powder and contains .005 percent of phosphorous. Bars were pressed to a density of 6.4 g/cc in a 4x.50x.375 inch die and sintered at 2050 degrees F in dissociated ammonia for a half hour. Holding rods for use during swaging were welded to each bar which was then reheated at 2100 degrees F in an exothermic atmosphere for twenty minutes. Bar #1 was hot swaged at 2100 degrees F to a .50 inch round and cooled in water, annealed at 1500 degrees F for twenty minutes and air cooled and then cold swaged to .

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Hot Swaging of Sintered Iron

Recent tests indicate that the hot swaging of iron phosphorous powdered metal tends to form a material comparable to low alloy steel. The tests were run with iron alloys containing phosphorous ranging from .0 to .6 percent of phosphorous. The best results were noted from a Plast iron B212 which is carbon free, reduced iron powder and contains .005 percent of phosphorous. Bars were pressed to a density of 6.4 g/cc in a 4x.50x.375 inch die and sintered at 2050 degrees F in dissociated ammonia for a half hour. Holding rods for use during swaging were welded to each bar which was then reheated at 2100 degrees F in an exothermic atmosphere for twenty minutes. Bar #1 was hot swaged at 2100 degrees F to a .50 inch round and cooled in water, annealed at 1500 degrees F for twenty minutes and air cooled and then cold swaged to .375 inch round. Bar #2 was hot swaged from 2100 degrees F to .50 inch round and cooled in water, reheated to 1800 degrees F and hot swaged to a .375 inch round. Bar #3 was hot swaged to 2100 degrees F to a .50 inch round and cooled in water and then cold swaged to a
.375 inch round. Two tensile specimens were prepared from each bar, one in each case being annealed at 1680 degrees F for a half hour in dissociated ammonia. Following are the results of tensile and yield strength and hardness tests and percent of elongation. As Machined Test Bars

Bar RB Hardness ensile Strength % Elongation
1. 107 147,500 P S I 1.85
2. 87 84...