JP2010142866A - Method for surface treatment of metal component - Google Patents
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- JP2010142866A JP2010142866A JP2008325816A JP2008325816A JP2010142866A JP 2010142866 A JP2010142866 A JP 2010142866A JP 2008325816 A JP2008325816 A JP 2008325816A JP 2008325816 A JP2008325816 A JP 2008325816A JP 2010142866 A JP2010142866 A JP 2010142866A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 31
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004381 surface treatment Methods 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 29
- 238000003466 welding Methods 0.000 claims abstract description 27
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 8
- 229910019589 Cr—Fe Inorganic materials 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 229910000531 Co alloy Inorganic materials 0.000 claims abstract description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 4
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 13
- 229910001297 Zn alloy Inorganic materials 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 8
- 239000010953 base metal Substances 0.000 abstract 1
- 238000007747 plating Methods 0.000 description 15
- 239000010410 layer Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 238000007654 immersion Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000004512 die casting Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910001347 Stellite Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 210000004894 snout Anatomy 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- Coating By Spraying Or Casting (AREA)
Abstract
Description
本発明は、金属部品の表面処理方法、特に、溶融金属中での耐腐食性を要求される金属部品の表面処理方法に関する。 The present invention relates to a surface treatment method for metal parts, and more particularly, to a surface treatment method for metal parts that require corrosion resistance in molten metal.
従来より、溶融亜鉛合金めっき液中あるいは溶融アルミニウム合金めっき液中に配置されるシンクロールや、アルミダイキャストに際して溶融アルミニウムを金型に供給するスリーブには高度な耐腐食性が要求されていた。そこで、本願出願人は、特許文献１に記載されているように、アルミニウム合金めっき浴中での耐腐食性、耐摩耗性に優れた金属部品の表面処理方法を開発した。
本発明の目的は、溶融亜鉛合金液や溶融アルミニウム合金液に対する耐腐食性をさらに改善した金属部品の表面処理方法を提供することにある。 An object of the present invention is to provide a surface treatment method for metal parts, which further improves the corrosion resistance against molten zinc alloy liquid and molten aluminum alloy liquid.
前記目的を達成するため、本発明の一形態である金属部品の表面処理方法は、
金属部品の表面に、コバルト基合金材料からなる粉末にＷ，Ｍｏを加えた金属粉末を、プラズマ粉体溶接にて肉盛りし、ライニング層を形成することを特徴とする。さらに、前記ライニング層の表面をスケーリング処理して金属酸化膜を形成してもよい。コバルト基合金材料としては、Ｃｏ−Ｃｒ−Ｆｅ合金材料又はＣｏ−Ｃｒを主成分とする合金材料を好適に使用することができる。
In order to achieve the above object, a surface treatment method for a metal part according to one aspect of the present invention comprises:
A metal powder obtained by adding W and Mo to a powder made of a cobalt-based alloy material on the surface of a metal part is built up by plasma powder welding to form a lining layer. Further, the surface of the lining layer may be scaled to form a metal oxide film. As the cobalt-based alloy material, a Co—Cr—Fe alloy material or an alloy material mainly composed of Co—Cr can be preferably used.
以上の表面処理を施した金属部品は、溶融亜鉛合金液や溶融アルミニウム合金液に対して体積減や板厚減をほとんど生じることがなく、耐腐食性が極めて良好である実験結果を示した。 The metal parts subjected to the surface treatment described above showed experimental results with very good corrosion resistance with almost no volume reduction or thickness reduction with respect to the molten zinc alloy liquid or molten aluminum alloy liquid.
以下、本発明に係る金属部品の表面処理方法の実施例について添付図面を参照して説明する。 Embodiments of a surface treatment method for metal parts according to the present invention will be described below with reference to the accompanying drawings.
（金属部品、図１及び図２参照）
図１に、アルミダイキャストのための金型１０と、金型１０に溶融アルミニウム合金を供給するためのスリーブ１５を示す。金型１０は固定型１０ａと可動型１０ｂとからなり、矢印Ａ方向に型締めされる。スリーブ１５は一般的にＳＫＤ６１に窒化処理を施したものが使用されている。スリーブ１５には開口１５ａから溶融アルミニウム合金が流し込まれ、溶融アルミニウム合金はプランジャ１６にて金型１０のキャビティに供給される。
(Refer to metal parts, Fig. 1 and Fig. 2)
FIG. 1 shows a
スリーブ１５においては、溶融アルミニウム合金の流し込みを繰り返すことにより、特に開口１５ａの下部であるＢ領域に、溶損、ヒートクラックが発生したり、焼付きなどの問題を生じている。そこで、少なくとも領域Ｂあるいはスリーブ１５の全内周部分に以下に説明する本発明に係る表面処理を施すこととした。
In the
図２に、シンクロール２０を示す。一般に、鋼板に亜鉛合金めっきを施すには、鋼板をスナウトから溶融亜鉛合金めっき浴槽に投入し、めっき浴中で搬送した後にスナップロールによって浴槽から引き上げている。シンクロール２０は、例えばＳＵＳ３１６Ｌからなり、鋼板をめっき浴中で搬送するための部材である。このようなシンクロール２０やスナップロールにあっては溶融亜鉛合金めっき液に対する耐腐食性が要求され、以下に説明する本発明に係る表面処理を施すこととした。シンクロール２０に対しては、ロール表面部分に加えて、軸部分２１やその軸受けにも本発明に係る表面処理を施すことが好ましい。
FIG. 2 shows the
（表面処理の金属材料）
本発明に係る表面処理方法は、前記ＳＫＤ６１やＳＵＳ３１６Ｌなどを母材として、その表面に、コバルト基合金材料からなる粉末にＷ，Ｍｏを加えた金属粉末をプラズマ粉体溶接にて肉盛りし、ライニング層を形成する。得られたライニング層の表面をバーナで加熱するスケーリング処理し、金属酸化膜を形成してもよい。スケーリング処理で形成されるのは、Ｃｏ，Ｗ，Ｍｏなどの酸化膜であり、保護層として機能する。
(Metallic material for surface treatment)
The surface treatment method according to the present invention uses the SKD61, SUS316L or the like as a base material, and on the surface thereof, a metal powder obtained by adding W and Mo to a powder made of a cobalt base alloy material is built up by plasma powder welding, A lining layer is formed. The surface of the obtained lining layer may be scaled by heating with a burner to form a metal oxide film. What is formed by the scaling process is an oxide film such as Co, W, or Mo, which functions as a protective layer.
以下に示す浸漬実験のため、金属粉末の第１例として、３５ｖｏｌ％のＣｏ−Ｃｒ合金に６０ｖｏｌ％のＷ及び５ｖｏｌ％のＭｏを加えて＃１００〜２５０の混合粉末としたものを用意した。金属粉末の第２例として、３５ｖｏｌ％のＣｏ−Ｃｒ−Ｆｅ合金（Ｃｏ：５０ｖｏｌ％、Ｃｒ：３０ｖｏｌ％、Ｆｅ：２０ｖｏｌ％）に６０ｖｏｌ％のＷ及び５ｖｏｌ％のＭｏを加えて＃１００〜２５０の混合粉末としたものを用意した。なお、Ｗは約３０〜８０ｖｏｌ％の範囲で加えることができ、Ｍｏは約１〜２０ｖｏｌ％の範囲で加えることができる。 For the immersion experiment shown below, as a first example of metal powder, a mixed powder of # 100 to 250 was prepared by adding 60 vol% W and 5 vol% Mo to a 35 vol% Co—Cr alloy. As a second example of the metal powder, by adding 60 vol% W and 5 vol% Mo to a 35 vol% Co—Cr—Fe alloy (Co: 50 vol%, Cr: 30 vol%, Fe: 20 vol%) # 100 to 250 A mixed powder was prepared. In addition, W can be added in the range of about 30-80 vol%, and Mo can be added in the range of about 1-20 vol%.
（プラズマ粉体溶接法、図３参照）
ここで、プラズマ粉体溶接法について説明する。プラズマ粉体溶接法は、図３に示すように、溶接トーチ３０の中心孔３１にタングステン電極３２を設け、中心孔３１にアルゴンガスを供給してガスプラズマを発生させる。溶接トーチ３０の先端からはパイロットアークＰａ及びメインアークＭａが噴出する。同時に、溶接トーチ３０の粉末供給孔３３から前記金属粉末を供給する。この金属粉末はメインアークＭａによって溶融し、母材３５の表面に容着し、ライニング層３６が形成される。また、溶接トーチ３０のガス供給孔３４からはシールドガス（通常、アルゴンガス）が供給される。
(Plasma powder welding method, see Fig. 3)
Here, the plasma powder welding method will be described. In the plasma powder welding method, as shown in FIG. 3, a
このようなプラズマ粉体溶接法は、他の溶接法（被覆アーク溶接、ディグ溶接、ミグ溶接、サブマージ溶接、ガス溶接）と比較して、以下の特徴を有している。
（１）母材への溶け込み深さが小さく、希釈率は通常５％以下である。従って、１層で目標の化学成分の肉盛り金属が得られる。
（２）肉盛り材料として粉末を用いるため、材料をワイヤやロッドに形成する必要がなく、一般金属の各種炭化物を主成分とする超硬複合合金の肉盛りも容易に行うことができ、炭化物含有量の調整も自由である。
（３）アルゴンガス中での自動溶接であるため、ブローホールなどの欠陥が少ない。
（４）溶融溶接であるため、母材との結合は冶金結合であり、剥離などの問題はない。
Such a plasma powder welding method has the following characteristics as compared with other welding methods (covered arc welding, dig welding, MIG welding, submerged welding, gas welding).
(1) The penetration depth into the base material is small, and the dilution rate is usually 5% or less. Therefore, a build-up metal having a target chemical component can be obtained in one layer.
(2) Since powder is used as the build-up material, it is not necessary to form the material into wires or rods, and it is possible to easily build up a cemented carbide composite alloy mainly composed of various carbides of general metals. The content can be adjusted freely.
(3) Since it is automatic welding in argon gas, there are few defects such as blow holes.
(4) Since it is fusion welding, the bond with the base material is a metallurgical bond, and there is no problem such as peeling.
（浸漬試験結果、図４〜図７参照）
次に、ＳＳ４００を母材として前記金属材料の第１例及び第２例を用いてそれぞれプラズマ粉体溶接法にてライニング層を形成して試験片とし、溶融亜鉛合金めっき浴中及び溶融アルミニウム合金めっき浴中へ浸漬した。試験片はライニング層を縦４５ｍｍ、横１５ｍｍ、厚さ５ｍｍに切り出したものである。
(Immersion test results, see FIGS. 4 to 7)
Next, using SS400 as a base material, a lining layer is formed by plasma powder welding using the first and second examples of the metal material, respectively, and used as a test piece. It was immersed in a plating bath. The test piece is obtained by cutting a lining layer into a length of 45 mm, a width of 15 mm, and a thickness of 5 mm.
図４は、試験片を５８０℃のＡｌ：５５ｖｏｌ％−Ｚｎ：４５ｖｏｌ％の溶融亜鉛合金めっき浴中へ７日間浸漬したときの体積減を示し、図５は同条件での板厚減を示す。図６は、試験片を６５０℃のＡｌ：９０ｖｏｌ％−Ｓｉ：１０ｖｏｌ％の溶融アルミニウム合金めっき浴中へ７日間浸漬したときの体積減を示し、図７は同条件での板厚減を示す。 FIG. 4 shows the volume reduction when the test piece was immersed in a hot zinc alloy plating bath of Al: 55 vol% -Zn: 45 vol% at 580 ° C. for 7 days, and FIG. 5 shows the plate thickness reduction under the same conditions. . FIG. 6 shows the volume reduction when the test piece is immersed in a 650 ° C. Al: 90 vol% -Si: 10 vol% molten aluminum alloy plating bath for 7 days, and FIG. 7 shows the plate thickness reduction under the same conditions. .
比較のために、従来例として、ステライトＮｏ．１、Ｎｏ．６、Ｎｏ．２１、ＳＵＳ３１６Ｌのいずれも表面処理されていない試験片の浸漬結果も示す。さらに、特許文献１に記載されている表面処理を施した試験片の浸漬結果も示す。具体的には、Ｃｏ−Ｃｒ−Ｆｅ合金材料からなる粉末をプラズマ粉体溶接法にて肉盛りした試験片、及び、Ｃｏ−Ｃｒ−Ｆｅ合金材料にＣｒ3−Ｃ2を加えた金属粉末をプラズマ粉体溶接法にて肉盛りした試験片の浸漬結果も示す。 For comparison, as a conventional example, Stellite No. 1, no. 6, no. No. 21 and SUS316L are also shown the results of immersion of test pieces that were not surface-treated. Furthermore, the immersion result of the test piece which performed the surface treatment described in patent document 1 is also shown. Specifically, a test piece obtained by depositing a powder made of a Co—Cr—Fe alloy material by a plasma powder welding method, and a metal powder obtained by adding Cr 3 —C 2 to a Co—Cr—Fe alloy material The result of immersion of the test piece built up by the plasma powder welding method is also shown.
図４〜図７に明らかなように、本発明例ではいずれも体積減、板厚減は０であり、すぐれた耐腐食性を示した。さらに、前記ライニング層の表面を酸素バーナーで少なくとも６００℃で５分程度スケーリング処理した試験片にあってはより好ましい耐腐食性を示した。 As apparent from FIG. 4 to FIG. 7, in the examples of the present invention, the volume reduction and the plate thickness reduction were 0, indicating excellent corrosion resistance. Further, the test piece obtained by scaling the surface of the lining layer with an oxygen burner at least at 600 ° C. for about 5 minutes showed more preferable corrosion resistance.
（他の実施例）
なお、本発明に係る金属部品の表面処理方法は前記実施例に限定するものではなく、その要旨の範囲内で種々に変更することができる。
(Other examples)
In addition, the surface treatment method for metal parts according to the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist thereof.
特に、プラズマ粉体溶接の材料であるＣｏ−Ｃｒ−Ｆｅ合金材料は、Ｃｏ：５０ｖｏｌ％−Ｃｒ：３０ｖｏｌ％−Ｆｅ：２０ｖｏｌ％の組成以外に種々の組成のものを使用することができる。 In particular, as the Co—Cr—Fe alloy material, which is a material for plasma powder welding, materials having various compositions other than the composition of Co: 50 vol% —Cr: 30 vol% —Fe: 20 vol% can be used.
また、本発明は、前記実施例に示したスリーブやシンクロールのみでなく、溶融亜鉛合金液や溶融アルミニウム合金液に対する耐腐食性を要求される金属部品に幅広く適用することができる。 Further, the present invention can be widely applied not only to the sleeve and the sink roll shown in the above embodiment but also to metal parts that require corrosion resistance against molten zinc alloy liquid and molten aluminum alloy liquid.
１５…スリーブ
２０…シンクロール
３０…溶接トーチ
３５…母材
３６…ライニング層
15 ...
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| JP2017002386A (en) * | 2015-06-16 | 2017-01-05 | 株式会社ディ・ビー・シー・システム研究所 | Molten metal treating device and producing method thereof, and protective film and producing method thereof |
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| JPH01191758A (en) * | 1988-01-28 | 1989-08-01 | Toyota Motor Corp | Co-based alloy for build-up welding |
| JP2001164397A (en) * | 1999-12-10 | 2001-06-19 | Mitsui Eng & Shipbuild Co Ltd | Method for manufacturing high-temperature corrosion resistant material by molten salt electrodeposition method |
| JP2001314971A (en) * | 2000-05-08 | 2001-11-13 | Aiseihaado Kk | Plasma powder welding method and welding powder used therefor |
| JP2007100217A (en) * | 2006-10-27 | 2007-04-19 | Sumitomo Metal Ind Ltd | Roller for conveying hot material |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01191758A (en) * | 1988-01-28 | 1989-08-01 | Toyota Motor Corp | Co-based alloy for build-up welding |
| JP2001164397A (en) * | 1999-12-10 | 2001-06-19 | Mitsui Eng & Shipbuild Co Ltd | Method for manufacturing high-temperature corrosion resistant material by molten salt electrodeposition method |
| JP2001314971A (en) * | 2000-05-08 | 2001-11-13 | Aiseihaado Kk | Plasma powder welding method and welding powder used therefor |
| JP2007100217A (en) * | 2006-10-27 | 2007-04-19 | Sumitomo Metal Ind Ltd | Roller for conveying hot material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017002386A (en) * | 2015-06-16 | 2017-01-05 | 株式会社ディ・ビー・シー・システム研究所 | Molten metal treating device and producing method thereof, and protective film and producing method thereof |
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