Method of producing workpiece and workpiece thereof
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United States of America Patent
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May 8, 2018
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app pub date -
Oct 26, 2012
filing date -
Jul 31, 2012
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Abstract
A method of producing a workpiece includes: providing a first powder, with a hardness of the first powder being less than 250 HV, and with a mean particle size of the first powder being less than 20 μm; mixing the first powder and a second powder to form a mixed powder, with the mixed powder including carbon, chromium, iron, and elements selected from the group consisting of molybdenum, nickel, copper, niobium, vanadium, tungsten, silicon, cobalt, and manganese; adding a binder and water to the mixed powder; applying a spray drying process to granulate the mixed powder to form a spray-dried powder; applying a dry pressing process to the spray-dried powder to form a green part; applying a debinding process to the green part to form a debound body; and sintering the debound body into a workpiece having a hardness of higher than 250 HV.
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