EP2350326B1 - Feuillard d alliage inoxydable à ultra-haute résistance, procédé de fabrication associé et procédé d utilisation associé pour fabriquer une tête de club de golf - Google Patents

Feuillard d alliage inoxydable à ultra-haute résistance, procédé de fabrication associé et procédé d utilisation associé pour fabriquer une tête de club de golf Download PDF

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Publication number
EP2350326B1
EP2350326B1 EP09745252.8A EP09745252A EP2350326B1 EP 2350326 B1 EP2350326 B1 EP 2350326B1 EP 09745252 A EP09745252 A EP 09745252A EP 2350326 B1 EP2350326 B1 EP 2350326B1
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Prior art keywords
strip article
elongated
max
club head
golf club
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EP09745252.8A
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German (de)
English (en)
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EP2350326A1 (fr
Inventor
Theodore Kosa
David E. Wert
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CRS Holdings LLC
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CRS Holdings LLC
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/02—Hardening by precipitation
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

Definitions

  • This invention relates to stainless steel strip material and in particular to a stainless steel strip article having very high tensile strength, a method of making same, and a method of using the strip material for making a golf club head.
  • club heads are typically manufactured using a cast body with a faceplate.
  • the cast body material is typically formed of a precipitation hardenable stainless steel such as 17-4 PH or 15-5 PH stainless steel.
  • Golf clubs are typically manufactured by welding the faceplate to the cast body and then heat treating the entire assembly to develop final properties.
  • the alloys typically used for the cast body of the club have solution temperatures of about 1900°F (1038°C), whereas the known faceplate materials have solution temperatures ranging from 1550°F to 1800°F (843°C to 982°C). This mismatch in heat treating temperatures results in either the club body, or the faceplate material, or possibly both, providing less than optimum properties in the as-heat treated condition after assembly of the club head.
  • the CUSTOM 475 alloy often requires a different manufacturing process altogether, because the alloy cannot be re-solutioned after club head assembly.
  • a stainless steel strip article that is formed from a corrosion resistant alloy comprising, in weight percent, about: C 0.03 max. Mn 1.0 max. Si 0.75 max. P 0.040 max. S 0.020 max. Cr 10.9-11.1 Ni 10.9-11.1 Mo 0.9-1.1 Ti 1.5-1.6 Al 0.25 max. Nb 0.7-0.8 Cu 1 max. B 0.010 max. N 0.030 max. and the balance is iron and usual impurities.
  • the elongated thin strip article provides a room temperature tensile strength of at least 280 ksi (1930.5 MPa) in the solution treated and age hardened condition.
  • a method of making a thin strip article comprises the steps of casting a corrosion resistant alloy having the weight percent composition set forth above to form an ingot.
  • the ingot is hot worked to form an elongated strip material.
  • the strip material is then heat treated under conditions of time and temperature to provide an ultimate tensile strength of at least about 280 ksi (1930.5 MPa) at room temperature.
  • the heat treating step comprises the steps of: heating the elongated strip article at a temperature of 1038-1093°C; and then heating the elongated strip article at a temperature of 482°C to 510°C.
  • a method of making a golf club head includes the step of casting a corrosion resistant alloy having the weight percent composition set forth above to form an ingot.
  • the ingot is hot worked to form an elongated strip article which is then heat treated under conditions of time and temperature to benefit the machinability and processability of the strip material.
  • the strip material is then machined to form a faceplate for a golf club head.
  • the method includes the further step of forming a golf club head body from a corrosion resistant precipitation hardenable steel alloy.
  • the faceplate is bonded to golf club head body.
  • the assembly is then heat treated under conditions of time and temperature sufficient to provide a desired level of hardness and strength in the golf club head body and an ultimate tensile strength of at least about 280 ksi (1930.5 MPa) at room temperature in the faceplate.
  • the heat treating step comprises the steps of: heating the elongated strip article at a temperature of 1038-1093°C; and then heating the elongated strip article at a temperature of 482°C to 510°C.
  • the drawing is a graph of tensile strength as a function of aging temperature.
  • a preferred embodiment of the invention includes an elongated strip article having the following composition in weight percent: C 0.03 max. Mn 1.0 max. Si 0.75 max. P 0.040 max. S 0.020 max. Cr 10.9-11.1 Ni 10.9-11.1 Mo 0.9-1.1 Ti 1.5-1.6 Al 0.25 max. Nb 0.7-0.8 Cu 1 max. B 0.010 max. N 0.030 max. The balance is iron and the usual impurities.
  • the alloy composition is preferably melted using vacuum induction melting (VIM).
  • VIM vacuum induction melting
  • the steel is cast into one or more ingot molds.
  • VAR vacuum arc remelted
  • the alloy is formed into strip by intermediate pressing of the ingot to form a billet and then hot rolling the billet to form elongated strip.
  • the strip material can be formed by hot rolling the ingot from a starting temperature of 1900°F to 2250°F (1038°C to 1232°C).
  • the strip can be provided in the overaged condition by heating at 1100OF to 1350°F (593°C to 732°C) for about 2 to 8 hours and then cooling in air.
  • the strip material is heated at 1900°F to 1950°F (1038°C to 1065°C) for 1 hour, cooled in air, refrigerated at -100°F (-73.3°C) for 8 hours, and then warmed in air to room temperature.
  • the strip material is cold rolled to final or near final thickness prior to being heat treated.
  • the strip material according to this invention can be solution treated in a continuous furnace with times and temperatures adjusted accordingly.
  • the strip material is processed to a thickness of 0.02-0.16 inches (0.5-4 mm), preferably 0.10-0.12 inches (2.5-3.0 mm).
  • the alloy strip according to this invention can be double solution treated with no significant loss in properties, particularly no loss of strength.
  • the stainless steel strip material of this invention can be provided in the solution treated plus refrigerated condition, processed into components, and then re-solutioned, re-refrigerated, and age hardened after being assembled into a golf club head to provide the desired high strength and hardness.
  • the ingot was homogenized at about 2300°F (1260°C) for 16 hours, and then pressed to a 4-in x 8-in (10 cm x 20.3 cm) billet from a starting temperature of about 2000°F (1093°C).
  • the billet was hot rolled to 7.5 in. wide x 0.15 in. thick (19 cm wide x 3.8 mm thick) strip from a starting temperature of about 2250°F (1232°C).
  • the strip was then ground to 0.135 in. (3.4 mm) thick and then cold rolled to 0.1103 in. (2.8 mm) thick.
  • the strip was given an overaging treatment by heating at about 1146°F (619°C) for 5.5 hours. After cooling to room temperature, the strip material was ground to a final thickness of 0.1083 in (2.75 mm).
  • Standard strip tensile blanks were rough cut in the longitudinal and transverse orientations from the overaged strip. Groups of the blanks were solution treated at 1850°F (1010°C), 1900°F (1038°C), 1950°F (1065°C), and 2000°F (1093°C), respectively, for 1 hour and air cooled. The solution treated blanks were deep chilled at -100°F (-73.3°C) for 8 hours and then warmed in air to room temperature. The blanks were then rough machined to provide a gage section about 1 ⁇ 2 inch wide x 2 inches long (1.27 cm wide x 5.08 cm long).
  • Groups of the rough machined blanks from each solution treatment were aged at temperatures ranging from about 900°F (482°C) to about 975°F (524°C) for 4 hours and then air cooled.
  • the test specimens were finish machined after aging and tested at room temperature.
  • Tables 2 - 4 The results of room temperature tensile and hardness testing are presented in Tables 2 - 4 below including the solution treatment temperature (Solution Temp.) and the aging temperature (Age Temp.) in °F (°C), the 0.2% offset yield strength (Y.S.) and ultimate tensile strength (U.T.S.) in ksi (MPa), and the Rockwell C-scale hardness (Hardness) as HRC.
  • ASTM grain size means average grain size as determined in accordance with ASTM Standard Test Procedure E-112.
  • the preferred solution temperature is about 1900°F (1038°C) to about 1950°F (1065°C).
  • the preferred aging temperature is about 900°F to 925°F (482°C to 496°C) in order for the material to provide the desired 280 ksi (1930.5 MPa) U.T.S.
  • a graph of U.T.S. versus solution and aging temperature combinations is shown in the drawing.
  • the data presented in the tables show that a strip article made from the alloy composition described in this application is capable of attaining an U.T.S. 280 ksi (1930.5 MPa) or higher.
  • the strip material is much less heavily alloyed than other stainless compositions capable of that strength level, resulting in a lower alloy cost.
  • the strip material is capable of being solution heat treated more than once without sacrificing strength or toughness properties.
  • the strip material of this invention is preferably solution heat treated at a temperature in range of 1900-1950°F (1038-1065°C), making golf club faceplates of this composition fully compatible with the solution treating temperature for the precipitation hardenable stainless casting alloys most often used for the body of golf club head. Therefore, the faceplate and the club head body can be solution treated and age hardened in the assembled configuration to develop maximum hardness and strength, not only in the body of the club head, but also in the faceplate which makes contact with a golf ball.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Golf Clubs (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Claims (12)

  1. Feuillard fin et allongé, formé d'un alliage résistant à la corrosion, comprenant en pourcentage pondéral : C 0,03 max. Mn 1,0 max. Si 0,75 max. P 0,040 max. S 0,020 max. Cr 10,9-11,1 Ni 10,9-11,1 Mo 0,9-1,1 Ti 1,5-1,6 Al 0,25 max. Nb 0,7-0,8 Cu 1 max. B 0,010 max. N 0,030 max.
    le reste étant du fer et des impuretés habituelles, ledit feuillard fin et allongé présentant une résistance à la traction à température ambiante d'au moins 1930,5 MPa dans un état mis en solution et durci par vieillissement.
  2. Feuillard allongé selon la revendication 1, dans lequel le feuillard a une épaisseur comprise entre 0,5 et 4 mm.
  3. Feuillard allongé selon la revendication 1 ou 2, dans lequel l'alliage a une granulométrie moyenne inférieure à 7-8 ASTM.
  4. Feuillard allongé selon l'une quelconque des revendications 1 à 3, ayant une dureté de 53-54 HRC.
  5. Procédé de fabrication du feuillard fin et allongé selon la revendication 1, comprenant les étapes suivantes :
    moulage de l'alliage résistant à la corrosion afin de former un lingot ;
    usinage mécanique dudit lingot afin de former un feuillard allongé ; puis traitement thermique dudit feuillard allongé dans des conditions temporelles et thermiques permettant de fournir une résistance à la traction finale d'au moins 1930,5 MPa à température ambiante, ladite étape de traitement thermique comprenant les étapes suivantes :
    chauffage du feuillard allongé à une température comprise entre 1038 et 1093°C ; puis
    chauffage du feuillard allongé à une température comprise entre 482°C et 510°C.
  6. Procédé selon la revendication 5, dans lequel la première étape de chauffage comprend le chauffage de l'alliage à une température comprise entre 1038 et 1065°C.
  7. Procédé selon l'une quelconque des revendications 5 ou 6, dans lequel l'étape d'usinage mécanique du lingot comprend les étapes suivantes :
    compression du lingot pour former une billette ; puis
    laminage à chaud de la billette pour former le feuillard allongé.
  8. Procédé selon l'une quelconque des revendications 5 ou 6, dans lequel l'étape d'usinage mécanique du lingot comprend le laminage à chaud du lingot pour former le feuillard allongé.
  9. Procédé selon la revendication 7 ou 8, dans lequel l'étape d'usinage mécanique du lingot comprend le laminage à froid du feuillard fin et allongé afin de réduire son épaisseur à une dimension finale ou quasi-finale.
  10. Procédé selon la revendication 8 ou 9, dans lequel l'étape de laminage à chaud comprend le chauffage de la billette à 1038-1232°C.
  11. Procédé de fabrication d'une tête de club de golf, comprenant les étapes suivantes :
    préparation d'un feuillard fin et allongé conformément au procédé de l'une quelconque des revendications 5 à 10 ;
    découpe dudit feuillard allongé afin de former une face pour une tête de club de golf ;
    formage du corps de tête de club de golf à partir d'un alliage d'acier durcissable par précipitation et résistant à la corrosion ;
    collage de ladite face audit corps de tête de club de golf afin de former un ensemble de tête de club de golf ; puis
    traitement thermique dudit ensemble de tête de club de golf dans des conditions temporelles et thermiques permettant de fournir une dureté et une solidité à l'ensemble de tête de club de golf , ainsi qu'une résistance à la traction finale d'au moins 1930,5 MPa à température ambiante dans ladite face, ladite étape de traitement thermique comprenant les étapes suivantes :
    chauffage du feuillard allongé à une température comprise entre 1038 et 1093°C ; puis
    chauffage du feuillard allongé à une température comprise entre 482°C et 510°C.
  12. Procédé selon la revendication 11, dans laquelle l'étape de traitement thermique du feuillard fin et allongé comprend l'étape de survieillissement du feuillard fin et allongé à 593-732°C.
EP09745252.8A 2008-10-31 2009-10-30 Feuillard d alliage inoxydable à ultra-haute résistance, procédé de fabrication associé et procédé d utilisation associé pour fabriquer une tête de club de golf Active EP2350326B1 (fr)

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Application Number Priority Date Filing Date Title
US11003408P 2008-10-31 2008-10-31
PCT/US2009/062745 WO2010051440A1 (fr) 2008-10-31 2009-10-30 Feuillard d’alliage inoxydable à ultra-haute résistance, procédé de fabrication associé et procédé d’utilisation associé pour fabriquer une tête de club de golf

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EP2350326A1 EP2350326A1 (fr) 2011-08-03
EP2350326B1 true EP2350326B1 (fr) 2013-05-01

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US (2) US20100108203A1 (fr)
EP (1) EP2350326B1 (fr)
JP (1) JP5464214B2 (fr)
CN (1) CN102203300B (fr)
ES (1) ES2421431T3 (fr)
TW (1) TWI417402B (fr)
WO (1) WO2010051440A1 (fr)

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US20140161658A1 (en) * 2012-12-06 2014-06-12 Crs Holdings, Inc. High Strength Precipitation Hardenable Stainless Steel
JP2014113268A (ja) * 2012-12-07 2014-06-26 Bridgestone Sports Co Ltd ゴルフクラブヘッド
US10695620B2 (en) * 2013-11-05 2020-06-30 Karsten Manufacturing Corporation Club heads with bounded face to body yield strength ratio and related methods
US11446553B2 (en) 2013-11-05 2022-09-20 Karsten Manufacturing Corporation Club heads with bounded face to body yield strength ratio and related methods
TWI648083B (zh) * 2016-08-18 2019-01-21 美商卡斯登製造公司 局部熱處理之方法與設備
GB2568435B (en) * 2016-09-16 2022-11-09 Karsten Mfg Corp Multi-process hardening method
US11692232B2 (en) 2018-09-05 2023-07-04 Gregory Vartanov High strength precipitation hardening stainless steel alloy and article made therefrom
US20210316194A1 (en) * 2020-04-08 2021-10-14 Acushnet Company Striking face of a golf club head
CN111500954B (zh) * 2020-04-29 2021-07-13 天津航天机电设备研究所 一种高强镁合金大型薄壁铸件热处理工艺

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CN102203300A (zh) 2011-09-28
ES2421431T3 (es) 2013-09-02
JP5464214B2 (ja) 2014-04-09
JP2012507632A (ja) 2012-03-29
CN102203300B (zh) 2013-08-07
US20130220491A1 (en) 2013-08-29
TWI417402B (zh) 2013-12-01
WO2010051440A1 (fr) 2010-05-06
TW201024430A (en) 2010-07-01
EP2350326A1 (fr) 2011-08-03
US20100108203A1 (en) 2010-05-06

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