Die for die compacting of powdered material
First Claim
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1. A die for die compacting a powdered material, comprising:
- a die body having a penetrating die cavity to which a plurality of punches are adapted to apply for pressing the powdered material to be supplied to form a compact, the die cavity being provided with a coating composed of a material which is selected from the group consisting of titanium carbide, titanium nitride, alumina, titanium cyanide, hafnium nitride, chromium nitride, tungsten carbide and DLC; and
a die holder having a bore into which the die body is shrink fitted, the die holder being composed of a steel material which has a composition comprising, at ratio by mass, 0.2 to 0.6% carbon;
0.15 to 1.2% silicon;
1.2% or less of manganese;
0.03% or less of phosphorus;
0.03% or less of sulfur;
0.4 to 5.5% chromium;
at least one of 0.25 to 3.5% nickel, 0.2 to 3.0% molybdenum, 1.0 to 10% tungsten, 2.2% or less of vanadium and 3.8 to 4.5% cobalt; and
the balance iron.
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Abstract
Disclosed is a die for compacting a powdered material. The die has a die body having a penetrating die cavity to which a couple of punches are adapted to apply for pressing the powdered material to be supplied to form a compact, and a die holder having a bore into which the die body is shrink fitted. The die cavity is provided with a coating composed of a material which is selected from the group consisting of titanium carbide, titanium nitride, alumina, titanium cyanide, hafnium nitride, chromium nitride, tungsten carbide and DLC, and the die holder is composed of a steel material which is prepared by tempering at a temperature higher than a treatment temperature at which the coating is provided on the die cavity. The die cavity is tapered at a ratio within a range of 1/5,000 to 1/1,000.
10 Citations
12 Claims
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1. A die for die compacting a powdered material, comprising:
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a die body having a penetrating die cavity to which a plurality of punches are adapted to apply for pressing the powdered material to be supplied to form a compact, the die cavity being provided with a coating composed of a material which is selected from the group consisting of titanium carbide, titanium nitride, alumina, titanium cyanide, hafnium nitride, chromium nitride, tungsten carbide and DLC; and
a die holder having a bore into which the die body is shrink fitted, the die holder being composed of a steel material which has a composition comprising, at ratio by mass, 0.2 to 0.6% carbon;
0.15 to 1.2% silicon;
1.2% or less of manganese;
0.03% or less of phosphorus;
0.03% or less of sulfur;
0.4 to 5.5% chromium;
at least one of 0.25 to 3.5% nickel, 0.2 to 3.0% molybdenum, 1.0 to 10% tungsten, 2.2% or less of vanadium and 3.8 to 4.5% cobalt; and
the balance iron.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12)
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10. A die for compacting a powdered material into a compact, comprising:
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a die holder having a bore; and
a die body having a penetrating die cavity to which a plurality of punches are adapted to apply for pressing the powdered material to be supplied to form a compact, wherein the die body is shrink fitted into the bore of the die holder before the die cavity is provided with a coating composed of material which is selected from the group consisting of titanium carbide, titanium nitride, alumina, titanium cyanide, hafnium nitride, chromium nitride, tungsten carbide and DLC, wherein the die holder is composed of a steel which has a composition comprising, at ratio by mass, 0.2 to 0.6% carbon;
0.15 to 1.2% silicon;
1.2% or less of manganese;
0.03% or less of phosphorus;
0.03% or less of sulfur;
0.4 to 5.5% chromium;
at least one of 0.25 to 3.5% nickel, 0.2 to 3.0% molybdenum, 1.0 to 10% tungsten, 2.2% or less of vanadium and 3.8 to 4.5% cobalt; and
the balance iron.
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11. A die assembly for compacting a powdered material, comprising:
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a die unit comprising a die body having a penetrating die cavity being provided with a coating composed of a material which is selected from the group consisting of titanium carbide, titanium nitride, alumina, titanium cyanide, hafnium nitride, chromium nitride, tungsten carbide and DLC, and a die holder having a bore into which the die body is shrink fitted, the die holder being composed of a steel material which has a composition comprising, at ratio by mass, 0.2 to 0.6% carbon;
0.15 to 1.2% silicon;
1.2% or less of manganese;
0.03% or less of phosphorus;
0.03% or less of sulfur;
0.4 to 5.5% chromium;
at least one of 0.25 to 3.5% nickel, 0.2 to 3.0% molybdenum, 1.0 to 10% tungsten, 2.2% or less of vanadium and 3.8 to 4.5% cobalt; and
the balance iron; and
a plurality of punches which are adapted to apply to the die cavity for pressing the powdered material to be supplied into the die cavity to form a compact.
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Specification
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Current AssigneeHitachi Powdered Metals Company Limited (Resonac Holdings Corp.)
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Original AssigneeHitachi Powdered Metals Company Limited (Resonac Holdings Corp.)
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InventorsSugaya, Yoshimi, Iwakiri, Makoto
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Primary Examiner(s)Davis, Robert
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Assistant Examiner(s)NGUYEN, THUKHANH T
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Application NumberUS10/037,062Publication NumberTime in Patent Office991 DaysField of Search425/78, 425/352, 425/353, 425/355, 425/406, 425/410US Class Current425/78CPC Class CodesB22F 3/03 Press-moulding apparatus th...B30B 15/02 Dies; Inserts therefor; Mou...C23C 16/26 Deposition of carbon onlyC23C 16/34 Nitrides C23C16/303 takes p...C23C 16/36 CarbonitridesC23C 16/403 of aluminium, magnesium or ...C23C 30/00 Coating with metallic mater...
