| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide metal parts of a new composition having an excellent heat resistance and corrosion resistance. <P>SOLUTION: The method of producing the parts from the powdered metal comprises (a) the step of providing a metallic powder containing iron, 0 to 0.6wt% carbon, 0.5 to 5.0wt% silicon, 0.5 to 6.0wt% nickel, 0.5 to 1.5wt% molybdenum, 0 to 0.7wt% manganese, and 12 to 20wt% chromium (the respective weight percentages calculated based on the total weight of the powder), (b) the step of obtaining a green compact by compressing the powders at a pressure of 35 to 65 tsi, and (c) the step of heating the compact to a temperature of 2,100 to 2,400°F for 20 to 90 minutes, such that the resulting microstructure of the compact is either dual phase ferritic and austenitic or single phase ferritic. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
