WO2012169163A1 - 金属部品の表面処理方法 - Google Patents
金属部品の表面処理方法 Download PDFInfo
- Publication number
- WO2012169163A1 WO2012169163A1 PCT/JP2012/003630 JP2012003630W WO2012169163A1 WO 2012169163 A1 WO2012169163 A1 WO 2012169163A1 JP 2012003630 W JP2012003630 W JP 2012003630W WO 2012169163 A1 WO2012169163 A1 WO 2012169163A1
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- WO
- WIPO (PCT)
- Prior art keywords
- metal part
- pseudo
- plating
- polishing
- treatment method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/04—Heavy metals
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
Definitions
- the present invention relates to a surface treatment method for metal parts used in a disk drive of a personal computer.
- barrel media generally ceramic
- barrel media may pierce the material surface and remain as it is.
- electroless Ni-P plating treatment and other coating treatments are generally performed to completely cover the product surface, and the effect is great.
- heat treatment in a reducing atmosphere after barrel polishing reduces the oxide remaining on the surface to leave iron, and keeps the diffusion temperature to diffuse iron and base metal fragments into the base material.
- the problem to be solved is that the electroless Ni-P plating process and other coating processes are superior in terms of quality, but they are expensive, and a pseudo-plated layer may be formed in the heat treatment after barrel polishing. In other words, the same quality as plating and other coating treatments could not be obtained.
- the present invention chemically polishes the surface of a metal part formed in a predetermined shape in order to form a pseudo plating layer on the surface of the metal part and to obtain the same quality as plating or other coating treatment.
- a polishing step for electrolytic polishing and a heat treatment pseudo plating step for forming a pseudo plating layer by heat-treating the metal part by heating at a temperature equal to or higher than a solution temperature in a reducing atmosphere after the polishing step are provided.
- the metal component surface treatment method of the present invention has the above-described configuration, a pseudo plating layer is formed on the surface of the metal component, and a quality equivalent to the electroless Ni-P plating treatment and other coating treatments can be obtained. . Quality equivalent to electroless Ni-P plating treatment and other coating treatments can be obtained at low cost. Adhesion of contaminants (inclusions) scattered from the outside can be suppressed by the same quality as the electroless Ni-P plating process and other coating processes.
- Example 1 It is process drawing of the surface treatment method of metal parts.
- Example 1 It is a photograph which shows the comparison with barrel polishing and chemical polishing.
- Example 1 It is a photograph showing a comparison with and without heat treatment.
- Example 1 It is a photograph which shows a comparison of surface untreated, plating treatment, and pseudo plating treatment.
- Example 1 It is the graph which compared the number of contaminations of a plated product, a pseudo-plated product, and an untreated product.
- Example 1 It is the graph which compared the number of contaminations of a plated product, a pseudo-plated product, and an untreated product.
- FIG. 1 is a process diagram of a surface treatment method for metal parts.
- a stainless steel pressing / machining step S1 As shown in FIG. 1, in the surface treatment method for metal parts according to Example 1 of the present invention, a stainless steel pressing / machining step S1, a barrel polishing step S2 as a pretreatment step, a chemical polishing step S3 as a polishing step, and A heat treatment pseudo plating step S4 is provided.
- the barrel polishing step S2 can be omitted.
- a stainless steel part used for a disk drive for example, a stainless steel base plate used for a head suspension of a hard disk drive is used as a metal part, and the press working is performed. is doing. This process may include other machining.
- the base plate is made of, for example, stainless steel (Fe—Cr—Ni system) having a thickness of about 200 ⁇ m.
- the base plate is fixed by laser welding in a state of being superimposed on the base of the load beam. It has a short cylindrical boss formed by pressing. The boss portion is inserted into the mounting hole of the actuator arm and fixed by ball caulking.
- a barrel polishing apparatus is used, and barrel polishing of the base plate is performed as a pretreatment.
- granular abrasives such as iron, plastic, or plastic including stainless steel powder are used.
- the shape of the abrasive is not limited, but for example, an abrasive having a polyhedral shape or a burette shape is used.
- the barrel polishing device has a cylindrical polishing tank. Inside the polishing tank, a base plate is placed as a large number of objects to be polished, and an abrasive, water and additives as necessary are accommodated. Then, the polishing tank is rotated by a motor.
- This rotation causes the base plate to be polished by the abrasive, thereby removing surface irregularities and cut burrs.
- the polished base plate may have fine debris of the abrasive material or debris of the base material attached or pierced on the surface. Therefore, these processes are performed in the next chemical polishing step S3.
- the surface is polished by a chemical reaction with a metal part using an acidic chemical (chemical solution).
- the surface of the base plate which is a metal part formed in a predetermined shape, is scraped off by 0.5 ⁇ m or more by chemical polishing. By this scraping off, the abrasive sticking remaining in the barrel polishing step S2 is removed.
- This removal modifies the surface of the base plate to a high cleanliness level.
- a surface with many irregularities such as a fractured surface can be smoothed, the adhesion of contamination during processing can be greatly reduced.
- the base plate is heated in a reducing atmosphere to form a pseudo plating layer on the surface.
- the reducing atmosphere for example, a hydrogen atmosphere is used, and heat treatment is performed at a temperature higher than the solution temperature, for example, 850 ° C. or higher, preferably around 1040 ° C. to avoid sensitization, and then cooled.
- the heat treatment is set according to the target metal part.
- the heat treatment is performed in relation to temperature and time, and the temperature may be raised to shorten the treatment time, or the temperature may be lowered to lengthen the treatment time.
- Such heat treatment after chemical polishing reduces the surface oxides and promotes the smoothing of the surface of the base plate by the diffusion phenomenon.
- the minute contaminants that remain without being removed by chemical polishing are also wrapped in the base material, so that they fall out of the heat-treated member, and the contamination is drastically reduced.
- the surface equivalent to the electroless Ni-P plating process and other coating processes can be obtained by the pseudo plating layer.
- FIG. 2 is a photograph showing a comparison between barrel polishing and chemical polishing.
- FIG. 3 is a photograph showing a comparison with and without heat treatment.
- FIG. 4 is a photograph showing a comparison of a surface untreated product, a plated product, and a pseudo-plated product.
- the surface untreated product indicates the surface of a stainless steel material by press working.
- the plated product shows the surface of electroless Ni—P.
- the pseudo-plated product indicates a surface obtained by heat treatment after chemical polishing.
- the surface untreated product has a very rough surface and contains minute dust.
- FIG. 5 is a graph comparing the number of contaminants of a plated product, a pseudo-plated product, and an untreated product.
- the number of contaminations of the plated product and the pseudo-plated product was the same, and was much reduced compared with the number of contaminations of the untreated product.
- the surface of the stainless steel base plate formed in a predetermined shape is scraped off by 0.5 ⁇ m or more by chemical polishing, and after the chemical polishing step S3.
- the base plate is heat-treated in a reducing atmosphere by heating at a solution temperature or higher, for example, 850 ° C. or higher, preferably around 1040 ° C. to form a pseudo plating layer on the surface.
- the oxide on the surface is reduced, and smoothing of the surface of the base plate is promoted by the diffusion phenomenon. Contamination is drastically reduced by enveloping the minute contamination that remains without being removed by chemical polishing.
- the surface equivalent to the electroless Ni-P plating process and other coating processes can be obtained by the pseudo plating layer.
- the same quality as the electroless Ni-P plating treatment and other coating treatments can reliably suppress the contamination (inclusions) scattered from the outside to the base plate.
- a barrel polishing step S2 for pre-processing the base plate by barrel polishing was provided before the chemical polishing step S3.
- the metal part is the base plate of the head suspension, but the present invention can be applied to other metal parts that require the same quality as the plating process and other coating processes.
- the polishing step only needs to be able to form a pseudo plating layer by subsequent heat treatment, and depending on the metal part, electrolytic polishing may be used instead of chemical polishing.
- the scraping is not limited to 0.5 ⁇ m or more, and can be increased or decreased.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- ing And Chemical Polishing (AREA)
- Chemically Coating (AREA)
- Electroplating Methods And Accessories (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
図1は、金属部品の表面処理方法の工程図である。
[バレル研磨と化学研磨との比較]
図2は、バレル研磨と化学研磨との比較を示す写真である。
[熱処理]
図3は、熱処理あり、なしの比較を示す写真である。
[擬似メッキ層]
図4は、表面未処理品、メッキ処理品、擬似メッキ処理品の比較を示す写真である。表面未処理品は、プレス加工によるステンレス材の表面を示す。メッキ処理品は、無電解Ni-Pの表面を示す。擬似メッキ処理品は、化学研磨後の熱処理による表面を示す。
[コンタミの数]
図5は、メッキ品、擬似メッキ品、処理なし品のコンタミの数を比較したグラフである。
[実施例1の効果]
本発明実施例1の金属部品の表面処理方法は、所定形状に形成されたステンレス鋼製のベース・プレートの表面を化学研磨により0.5μm以上削り落とす化学研磨工程S3と、化学研磨工程S3後にベース・プレートを還元雰囲気中で溶体化温度以上、例えば850℃以上、望ましくは1040℃前後での加熱により熱処理して表面に擬似メッキ層を形成する。
[その他]
上記実施例では、金属部品を、ヘッド・サスペンションのベース・プレートとしたが、メッキ処理やその他の被覆処理と同等の品質を必要とするその他の金属部品にも適用することができる。
S2 バレル研磨工程(前処理工程)
S3 化学研磨工程(研磨工程)
S4 熱処理擬似メッキ工程
Claims (5)
- 所定形状に形成された金属部品の表面を化学研磨又は電解研磨する研磨工程と、
前記研磨工程後に前記金属部品を還元雰囲気中で溶体化温度以上の加熱により熱処理して表面に擬似メッキ層を形成する熱処理擬似メッキ工程と、
を備えたことを特徴とする金属部品の表面処理方法。 - 請求項1又は2記載の金属部品の表面処理方法であって、
前記研磨工程は、前記金属部品の表面を0.5μm以上削り落とす、
ことを特徴とする金属部品の表面処理方法。 - 請求項1又は2記載の金属部品の表面処理方法であって、
前記熱処理擬似メッキ工程は、前記還元雰囲気中で850℃以上の加熱で溶体化させ前記擬似メッキ層を形成する、
ことを特徴とする金属部品の表面処理方法。 - 請求項1~3の何れかに記載の金属部品の表面処理方法であって、
前記研磨工程の前に前記金属部品をバレル研磨で前処理する前処理工程を備えた、
ことを特徴とする金属部品の表面処理方法。 - 請求項1~4のずれかに記載の金属部品の表面処理方法であって、
前記金属部品は、ディスク・ドライブに供されるステンレス鋼製の部品である、
ことを特徴とする金属部品の表面処理方法。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013519379A JP5957451B2 (ja) | 2011-06-06 | 2012-06-01 | 金属部品の表面処理方法 |
| CN201280027721.0A CN103597121A (zh) | 2011-06-06 | 2012-06-01 | 金属部件的表面处理方法 |
| US14/119,644 US9489978B2 (en) | 2011-06-06 | 2012-06-01 | Method of surface-treating metal component |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011126772 | 2011-06-06 | ||
| JP2011-126772 | 2011-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012169163A1 true WO2012169163A1 (ja) | 2012-12-13 |
Family
ID=47295748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/003630 Ceased WO2012169163A1 (ja) | 2011-06-06 | 2012-06-01 | 金属部品の表面処理方法 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9489978B2 (ja) |
| JP (1) | JP5957451B2 (ja) |
| CN (1) | CN103597121A (ja) |
| WO (1) | WO2012169163A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103642398A (zh) * | 2013-11-28 | 2014-03-19 | 上海航天精密机械研究所 | 不锈钢材料抛光液及其用途 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03180500A (ja) * | 1989-12-07 | 1991-08-06 | Fujitsu Ltd | ステンレス鋼製の真空容器内壁の表面処理方法 |
| JP3563037B2 (ja) * | 2001-02-28 | 2004-09-08 | 日本アイ・ビー・エム株式会社 | 鉄系部品の製造方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5629680A (en) * | 1979-08-21 | 1981-03-25 | Nippon Steel Corp | Surface treatment in annealing line |
| JP4245457B2 (ja) * | 2003-10-29 | 2009-03-25 | 住友電工スチールワイヤー株式会社 | ステンレス鋼線、ばね、及びばねの製造方法 |
| JP5306894B2 (ja) * | 2009-05-08 | 2013-10-02 | 日本発條株式会社 | ディスク装置用サスペンションのベースプレートと、ベースプレートの製造方法 |
-
2012
- 2012-06-01 JP JP2013519379A patent/JP5957451B2/ja active Active
- 2012-06-01 WO PCT/JP2012/003630 patent/WO2012169163A1/ja not_active Ceased
- 2012-06-01 US US14/119,644 patent/US9489978B2/en active Active
- 2012-06-01 CN CN201280027721.0A patent/CN103597121A/zh active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03180500A (ja) * | 1989-12-07 | 1991-08-06 | Fujitsu Ltd | ステンレス鋼製の真空容器内壁の表面処理方法 |
| JP3563037B2 (ja) * | 2001-02-28 | 2004-09-08 | 日本アイ・ビー・エム株式会社 | 鉄系部品の製造方法 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103642398A (zh) * | 2013-11-28 | 2014-03-19 | 上海航天精密机械研究所 | 不锈钢材料抛光液及其用途 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103597121A (zh) | 2014-02-19 |
| JP5957451B2 (ja) | 2016-07-27 |
| JPWO2012169163A1 (ja) | 2015-02-23 |
| US20140150931A1 (en) | 2014-06-05 |
| US9489978B2 (en) | 2016-11-08 |
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