WO2006059459A1 - タングステン基焼結合金製ウェート及びその製造方法並びに振動発生装置用振動子 - Google Patents
タングステン基焼結合金製ウェート及びその製造方法並びに振動発生装置用振動子 Download PDFInfo
- Publication number
- WO2006059459A1 WO2006059459A1 PCT/JP2005/020428 JP2005020428W WO2006059459A1 WO 2006059459 A1 WO2006059459 A1 WO 2006059459A1 JP 2005020428 W JP2005020428 W JP 2005020428W WO 2006059459 A1 WO2006059459 A1 WO 2006059459A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sintered alloy
- tungsten
- mass
- based sintered
- weight
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Definitions
- Weight of tungsten-based sintered alloy, manufacturing method thereof, and vibrator for vibration generating apparatus Weight of tungsten-based sintered alloy, manufacturing method thereof, and vibrator for vibration generating apparatus
- the present invention relates to a weight made of a sintered tanta-based sintered alloy suitable for use in, for example, an eccentric weight for generating vibration for calling in a portable communication device, a balance weight for anti-vibration, and other weights. It relates to a manufacturing method.
- W_Ni_Cu, W_Ni_Fe, W_Ni_Mo_Fe, and W_Ni_Mo_Co based alloys are known.
- Ni plating treatment and coating treatment are usually applied to impart corrosion resistance to eccentric weights using these alloys.
- Patent Document 1 proposes, for example, the one disclosed in Patent Document 1 as this type of tungsten-based sintered alloy weight.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-129164
- the present invention does not rely on Ni plating for anti-oxidation or coating processing technology, and even without these treatments, the tandasten group has desired oxidation resistance and does not corrode.
- An object is to provide a sintered alloy weight.
- Ni 0.5-7 mass%
- Mo is 0.5.
- Ni 0.5-7 mass%
- Mo is 0.5.
- the invention of claim 3 is a tungsten-based sintered alloy weight characterized in that the inevitable impurity of claim 1 or 2 does not contain 1% by mass or more of Cu force. .
- the invention according to claim 4 is a method of using a binder phase forming component, W and raw materials of inevitable impurities so as to have the tungsten-based sintered alloy weight composition according to any one of claims 1 to 3.
- a method for producing a tungsten-based sintered alloy weight comprising mixing, dispersing, forming a green compact by pressing, and sintering the green compact in a hydrogen atmosphere.
- This is a method for producing a weight of a tanda-sten-based sintered alloy, characterized in that chromium carbide is blended as a raw material for the phase forming component Cr.
- the invention according to claim 5 is a method for producing the tungsten-based sintered alloy weight according to any one of claims 1 to 3, or the tungsten-based sintered alloy weight according to claim 4.
- the vibration generator vibrator is made of a tungsten-based sintered alloy weight obtained by the above-described method, and has a groove portion through which the rotation shaft of the motor is passed.
- a vibrator for a vibration generator characterized by being integrally coupled to a shaft.
- Cr is contained in the range of 0.:! To 1.0% by mass and is uniformly diffused in the dispersed phase of W_Mo.
- Combined gold weight Can be given corrosion resistance. For this reason, it is possible to provide a tungsten-based sintered alloy weight that does not corrode even if these treatments are not performed, regardless of the Ni plating and coating treatment technology for preventing corrosion.
- the tungsten-based sintered alloy weight has a high specific gravity of 17 to 19 and can be reduced in size, for example, for a mobile phone that is required to be thin.
- Fe is contained in an amount of 0.5 to 3.0% by mass, and is solid-solved in the Ni component to form a Ni_Fe_Mo bonded phase.
- the strength of the manufactured weight can be improved.
- the Cr component is diffused in the Ni_Fe_Mo bonded phase, and corrosion resistance can be imparted to the tungsten-based sintered alloy weight.
- Cr has the property of being easily oxidized, as a tungsten-based sintered alloy weight, it becomes an electrochemical passive state, so that oxidation can be minimized. For this reason, as described in claims 1 to 3, a compound other than chromium carbide or a simple substance may be blended as a raw material.
- the tungsten-based sintered alloy sheet contains 0.1 to 1.0 mass% of Cr, and is a dispersion of W_Mo. It has corrosion resistance because it diffuses uniformly in the phase and Ni_Fe_Mo bonded phase.
- the vibrator for a vibration generator of the invention described in claim 5 is susceptible to peeling of Ni plating for corrosion prevention due to impact during caulking, but the occurrence of corrosion regardless of the presence of Ni plating or the like. Can be prevented.
- FIG. 1 is a flow diagram of a process for producing a tungsten-based sintered alloy weight shown as an embodiment of the present invention.
- FIG. 2 shows a state in which a vibration generator for a vibration generating device made of a tungsten-based sintered alloy weight is coupled to a rotating shaft of an electric motor (a motor incorporated in a mobile phone) by caulking. It is a perspective view shown.
- the weight of the tungsten-based sintered alloy according to the present embodiment includes a raw material blending (SP1) step of blending W powder, Ni powder and the like, and ball mill milling and the like of this raw material.
- a wet mixing (SP2) step a pressure forming (SP3) step for pressing the raw material dispersed by the wet mixing to obtain a formed body, and a pre-sintering (SP4) step for pre-sintering the formed body. Further, it is manufactured through a main sintering (SP5) process in which the powder is completely sintered.
- W powder as a dispersed phase forming component, Ni powder, Mo powder, Cr C powder and optionally Fe powder etc. as a binder phase forming component are blended as raw materials. .
- this W powder one having an average particle diameter of 0.5 to 5 ⁇ mm is used in order to obtain appropriate moldability and sinterability.
- the binder phase forming component a powder having an average particle size comparable to that of W powder is used.
- each component after the main sintering (SP5) step is as follows: Ni is 0.5 to 7% by mass, Mo is 0.5 to 4% by mass, and ⁇ is 0. ! ⁇ 1.0 mass%, and if necessary, mix each powder so that Fe may be 0.5-3.0 mass%, and the specific gravity of the tungsten-based sintered alloy weight will be 17-: 19.
- S5 main sintering
- This Cr C is decomposed in the subsequent pre-sintering (SP4) step and main sintering (SP5) step, and at the same time, diffuses into the dispersed phase and the binder phase, and dissolves without being oxidized.
- tungsten-based sintered alloy weight forms an electrochemical passivation film on the surface of the tungsten-based sintered alloy weight. For this reason, tungsten-based sintered alloy weights have the desired corrosion resistance with minimal oxidation. Therefore, compounds other than Cr C or simple substances may be used as raw materials.
- the powder blended in the raw material blending step (SP1) is put into a ball mill and wet mixed for 48 hours using an organic solvent such as acetone.
- an organic solvent such as acetone.
- the uniformly dispersed powder is filled into a pressing die and molded at a pressure of 19 X 60 X 10 5 Pa (2000 kg / cm 2 ).
- a green compact having a substantially fan-shaped cross section with an arc radius of several mm as shown in FIG. 2 and the entire fan-shaped portion being the eccentric load portion 11 is obtained.
- a groove 13 is formed at the center of the outer peripheral circular arc that draws the fan-like shape of the eccentric load portion 11, and side walls that bulge from the eccentric load portion 11 and form both side edges of the groove 13 on both sides of the groove 13. 14 are continuously provided.
- the green compact is sintered in a hydrogen atmosphere at a temperature of 900 ° C for 3 hours.
- the pre-sintered green compact is further sintered in a hydrogen atmosphere at a temperature of 1400 ° C to 1550 ° C for 1 hour.
- the green compact is sintered in a hydrogen atmosphere, so that the oxidizable Cr component is also sintered in a reducing atmosphere. Suppresses the generation of chromium oxide. In addition, oxidation of other binder phase forming components is prevented, and corrosion resistance is imparted to the tungsten-based sintered alloy weight.
- the tungsten-based sintered alloy weight 10 shown in FIG. 2 (however, the shape in which the crimped portion 14c is not formed) is obtained. And this weight 10 has specific gravity, bending strength ( X 10 7 Pa (kgf / mm 2 )) and ductility (%) etc. are evaluated (SP6) and then handled as a finished product.
- the remaining caulking portion 14c on the groove 13 side is caulked and deformed from the opening 15 side to the bottom side of the groove 13 by a rectangular parallelepiped caulking punch (not shown).
- the caulking portion 14c is deformed by caulking so that the rotating shaft 12 of a stainless steel motor such as SUS420 can be fitted.
- the tungsten-based sintered alloy weight 10 is integrally coupled to the rotary shaft 12, and is used for the vibration generating device attached to the motor incorporated in the mobile phone (mobile communication device) shown in FIG. It becomes a vibrator.
- a product manufactured from the raw material blending (SP1) process through the main sintering (SP5) process and handled as a finished product in the above evaluation (SP6) has a specific gravity of 17 to 19:
- As a binder phase forming component Ni is contained in an amount of 0.5 to 7% by mass, Mo is contained in an amount of 0.5 to 4% by mass, Cr is contained in an amount of 0:! W and unavoidable impurities.
- the binder phase-forming component further contains Fe in an amount of 0.5 to 3.0% by mass, and the balance is W as a dispersed phase-forming component and inevitable impurities.
- Cu may be contained as long as it is less than 1% by mass, but it is preferably not contained.
- the tungsten-based sintered-bonded gold weight containing the Cu component is prone to corrosion, and particularly when the content is 1% by mass or more, significant oxidation occurs due to the presence of free Cu. And corrosive development makes it remarkably susceptible to corrosion. On the other hand, if it is less than 1% by mass, the amount of free Cu deposited on the surface of the weight due to the solid solution in the Ni—Fe_Mo bonded phase is extremely small, and the effect on the oxidation resistance is small.
- the weight of the tungsten-based sintered alloy has a specific gravity of 17.0 to 19.0. Since it is high, it is reduced in size, and can be adapted to, for example, a mobile phone that is required to be thin.
- the Ni component is an indispensable binder phase for providing the liquid phase necessary for the sintering of W powder and for improving the grain boundary diffusion coefficient of W. Forming component.
- the Ni component is specified in the above range because if it is less than 0.5% by mass, the W sintered alloy will not be densified, the specific gravity will be reduced, and the strength will be increased by the presence of residual vacancies. It is because it falls extremely.
- the Mo component has the property of being completely dissolved in the W component as the dispersed phase forming component, and improves the strength of the dispersed phase forming component.
- the Mo component is specified in the above range because the effect of improving the strength is small if it is less than 0.5% by mass. If it exceeds 4% by mass, the sinterability is hindered and the sintering temperature is remarkably increased. As a result, the sintering becomes insufficient, and the presence of undiffused Mo immediately deteriorates the strength of the alloy.
- the Cr component has the property of uniformly diffusing into the W-Mo dispersed phase forming component or Ni-Fe-Mo bonded phase forming component, thereby forming a Cr film that is totally passivated. And improve the oxidation resistance of tungsten-based sintered alloy weights in an oxidizing atmosphere or wet environment.
- this Cr component is specified in the above range is that if it is less than 0.1% by mass, the oxidation resistance is not sufficiently exhibited. If it exceeds 1.0% by mass, it will exceed 10% by mass together with other binder phase forming components that are not only inferior in sinterability, but W as a dispersed phase forming component will be less than 90% by mass. 17.0-: 19.0 High specific gravity tungsten-based fired bonded gold weight cannot be obtained. In addition, the thermal decomposition of Cr C takes time and
- the tungsten-based sintered alloy In addition to being inferior in fruit, if Cr C remains, the tungsten-based sintered alloy
- the strength characteristics of the sheet will be reduced.
- the Fe component is dissolved in the N content to improve the strength of the binder phase forming component.
- This Fe component is limited as described above. If the amount is less than 0.5% by mass, the effect of improving the strength is insufficient. This is because the strength is impaired.
- the caulking portion 14c of the vibration generating vibrator 10 has a load that is applied during caulking deformation even if it is subjected to treatment such as corrosion prevention Ni plating.
- treatment such as corrosion prevention Ni plating.
- the vibrator is made of the above-described composition, the occurrence of corrosion is prevented.
- Ni powder, Mo powder, Cr C powder and Fe powder as binder phase forming components and W powder as dispersed phase forming components are shown in Table 1 for each component (mass%) and specific gravity after main sintering.
- Each raw material was blended so that the ratio was! ⁇ 3.
- each of Examples 2 and 3 was blended with three raw materials (corresponding to Examples 2-1, 2-2, 2-3, 3-1, 3-2, 3-3).
- Ni powder Incol 23 manufactured by Inco Corporation with an average particle size of 5 ⁇ m was used.
- Mo powder Mo-1 manufactured by Nippon Shin Metal Co., Ltd. with an average particle size of 10 ⁇ was used.
- Cr C powder use Cr C powder made by Nippon Shin Metals Co., Ltd.
- Fe powder use Fe powder made by Inco with a particle size of 2 ⁇ m.
- W powder W-4 manufactured by Nippon Shin Metal Co., Ltd. having a particle size of 4 ⁇ m was used. [More SP 1]
- this molded body was pre-sintered.
- Example 1 A sintered body of Example 2 sintered at 1440 ° C is referred to as Example 2-1, a sintered body at 1460 ° C is referred to as Example 2-2, and a sintered body at 1480 ° C is referred to as Example. 2—3 .
- the molded body of Example 3 was sintered at 1440 ° C as Example 3-1, and the sintered body at 1460 ° C was set as Example 3-2 and sintered at 1480 ° C. This was taken as Example 3-3.
- a tungsten-based sintered alloy weight was obtained in the same manner as in Example 1 except that the Ni powder as a binder phase forming component was combined at 3% by mass and the Cu powder at 2% by mass. Similarly, the increased mass (g) due to oxidation was determined and shown in Table 2.
- the tandastene group has a desired oxidation resistance and does not corrode without depending on Ni plating for oxidation prevention or coating treatment technology, and without these treatments.
- a sintered alloy weight can be provided.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004351109A JP2006161076A (ja) | 2004-12-03 | 2004-12-03 | タングステン基焼結合金製ウェート及びその製造方法並びに振動発生装置用振動子 |
JP2004-351109 | 2004-12-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006059459A1 true WO2006059459A1 (ja) | 2006-06-08 |
Family
ID=36564896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/020428 WO2006059459A1 (ja) | 2004-12-03 | 2005-11-08 | タングステン基焼結合金製ウェート及びその製造方法並びに振動発生装置用振動子 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP2006161076A (ja) |
TW (1) | TW200622008A (ja) |
WO (1) | WO2006059459A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1983588A3 (en) * | 2007-04-18 | 2009-10-07 | Mitsumi Electric Co., Ltd. | Driving device having suitable stationary member as material |
US7732982B2 (en) | 2007-04-19 | 2010-06-08 | Mitsumi Electric Co., Ltd. | Driving device capable of reducing height thereof |
US7759634B2 (en) | 2007-04-24 | 2010-07-20 | Mitsumi Electric Co., Ltd. | Position detecting device capable of improving detection accuracy |
US7956513B2 (en) | 2007-04-20 | 2011-06-07 | Mitsumi Electric Co., Ltd. | Method of driving a driving device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101074746B1 (ko) | 2009-07-23 | 2011-10-19 | 안의현 | 진동모터의 진동자 제조방법 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07166287A (ja) * | 1993-09-01 | 1995-06-27 | N K K Seimitsu Kk | 耐食性に優れた焼結タングステン合金 |
JP2003064440A (ja) * | 2001-08-20 | 2003-03-05 | Mitsubishi Material Cmi Kk | 高比重高強度タングステン焼結合金製ウェート |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000126905A (ja) * | 1998-10-23 | 2000-05-09 | Mitsubishi Materials Corp | 耐欠損性にすぐれた表面被覆炭化タングステン基超硬合金製切削工具 |
JP3721510B2 (ja) * | 2001-03-14 | 2005-11-30 | 冨士ダイス株式会社 | 光学ガラスの熱間成形用金型およびその周辺部材に適した焼結合金 |
-
2004
- 2004-12-03 JP JP2004351109A patent/JP2006161076A/ja active Pending
-
2005
- 2005-11-08 WO PCT/JP2005/020428 patent/WO2006059459A1/ja active Application Filing
- 2005-11-21 TW TW094140821A patent/TW200622008A/zh unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07166287A (ja) * | 1993-09-01 | 1995-06-27 | N K K Seimitsu Kk | 耐食性に優れた焼結タングステン合金 |
JP2003064440A (ja) * | 2001-08-20 | 2003-03-05 | Mitsubishi Material Cmi Kk | 高比重高強度タングステン焼結合金製ウェート |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1983588A3 (en) * | 2007-04-18 | 2009-10-07 | Mitsumi Electric Co., Ltd. | Driving device having suitable stationary member as material |
US7755252B2 (en) | 2007-04-18 | 2010-07-13 | Mitsumi Electric Co., Ltd. | Driving device having suitable stationary member as material |
US7732982B2 (en) | 2007-04-19 | 2010-06-08 | Mitsumi Electric Co., Ltd. | Driving device capable of reducing height thereof |
US7956513B2 (en) | 2007-04-20 | 2011-06-07 | Mitsumi Electric Co., Ltd. | Method of driving a driving device |
US7759634B2 (en) | 2007-04-24 | 2010-07-20 | Mitsumi Electric Co., Ltd. | Position detecting device capable of improving detection accuracy |
Also Published As
Publication number | Publication date |
---|---|
TW200622008A (en) | 2006-07-01 |
JP2006161076A (ja) | 2006-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2006059459A1 (ja) | タングステン基焼結合金製ウェート及びその製造方法並びに振動発生装置用振動子 | |
JP4769287B2 (ja) | 粉末冶金用青銅粉末およびその製造方法 | |
JP4941236B2 (ja) | 焼結助剤及び焼結用アルミニウム含有銅系合金粉末並びに該焼結用アルミニウム含有銅系合金粉末を焼結してなる焼結体 | |
WO2004029313A1 (ja) | 高硬度・高強度で強靭なナノ結晶金属バルク材及びその製造方法 | |
JP2001240933A (ja) | 銅系摺動材料、その製造方法およびすべり軸受材料、その製造方法 | |
JP2002356704A (ja) | 耐摩耗性硬質相形成用合金粉末およびそれを用いた耐摩耗性焼結合金の製造方法 | |
EP1284300B1 (en) | Wear resistant sintered member and process of manufacture therefor | |
JPS62502813A (ja) | 高い電気特性及び機械特性を有する新規な合金、その製造方法並びに特に電気、電子及び関連分野におけるその使用 | |
JP3675378B2 (ja) | 高比重高強度タングステン焼結合金製ウェート | |
TW490337B (en) | Metal sintered body and production method thereof | |
JP3212225B2 (ja) | 小型振動発生装置用振動子 | |
JPS6148572B2 (ja) | ||
EP1582603B1 (en) | Iron base sintered alloy, iron base sintered alloy member, method for production thereof, and oil pump rotor | |
JP2007045918A (ja) | 自己潤滑性焼結体の原料粉末とその製造方法、自己潤滑性焼結体の製造方法 | |
JP4068627B2 (ja) | 高温用摺動合金 | |
JP3644499B2 (ja) | 高比重高強度タングステン基焼結合金製ウェート | |
JP7248027B2 (ja) | 焼結合金及びその製造方法 | |
JP3195506B2 (ja) | タングステン重合金の表面処理方法 | |
JP3205987B2 (ja) | タングステン基焼結合金部品 | |
JPH045745B2 (ja) | ||
JPH1161314A (ja) | 高加締め把持力および高強度を有する小型振動発生装置用振動子 | |
JP2009091609A (ja) | 焼結複合摺動部品およびその製造方法 | |
JP2573375B2 (ja) | 焼結部品の製造方法 | |
JP3415290B2 (ja) | 小型無線呼び出し機の振動発生装置用振動子の製造方法 | |
JP2004353006A (ja) | タングステン基焼結合金製ウェート |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KM KN KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 05806147 Country of ref document: EP Kind code of ref document: A1 |