JPH07268648A - Composite surface treatment of metallic material - Google Patents
Composite surface treatment of metallic materialInfo
- Publication number
- JPH07268648A JPH07268648A JP6479894A JP6479894A JPH07268648A JP H07268648 A JPH07268648 A JP H07268648A JP 6479894 A JP6479894 A JP 6479894A JP 6479894 A JP6479894 A JP 6479894A JP H07268648 A JPH07268648 A JP H07268648A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- welding
- filling layer
- carbide
- based alloy
- 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.)
- Granted
Links
Landscapes
- Coating With Molten Metal (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属材料の複合表面処
理方法で耐腐食性、耐摩耗性を要求される一般金属部品
に適用され、特に、耐腐食性、耐摩耗性が必要とされる
連続亜鉛めっき装置の被処理材（鋼板）をめっき浴中で
搬送するためのロールのスリーブや軸受に対する複合表
面処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to general metal parts which are required to have corrosion resistance and wear resistance in a composite surface treatment method for metal materials, and in particular, corrosion resistance and wear resistance are required. The present invention relates to a composite surface treatment method for a sleeve or bearing of a roll for transporting a material to be treated (steel plate) of a continuous galvanizing apparatus in a plating bath.
【０００２】[0002]
【従来の技術】鋼板に亜鉛めっきを施すには、鋼板をス
ナウトから溶融亜鉛浴槽に投入し、めっき浴中でガイド
ロールの周囲を搬送しつつ、スナップロールによって浴
槽から引き上げていた。ところで、ガイドロールのスリ
ーブ及び軸受は、溶融亜鉛による侵食が発生しないこ
と、摩耗（主に付着したドロスによる）が少ないという
性能を要求されている。そこで、従来では、これらの部
品には、ＳＵＳ３１６Ｌ（日本工業規格）等のステンレ
ス鋼を使用するか、これらの材料の表面にＣｏ基合金を
肉盛溶接あるいは溶射していた。しかし、従来の表面処
理では耐腐食性に関して満足するものの、耐摩耗性は不
十分であり、６〜１５日間の寿命であった。2. Description of the Related Art In order to galvanize a steel sheet, the steel sheet is put into a molten zinc bath from a snout and conveyed around a guide roll in the plating bath while being pulled up from the bath by a snap roll. By the way, the sleeves and bearings of the guide rolls are required to be free from erosion due to molten zinc and to have little wear (mainly due to attached dross). Therefore, conventionally, stainless steel such as SUS316L (Japanese Industrial Standard) is used for these parts, or a Co-based alloy is overlay welded or sprayed on the surface of these materials. However, although the conventional surface treatment satisfies the corrosion resistance, the abrasion resistance is insufficient and the life is 6 to 15 days.
【０００３】また、ＷＣ系の金属を溶接あるいは溶射す
ることも採用されたが、この方法ではＷＣの厚い層を形
成することができず、長寿命につながらないこと、溶接
法ではＷＣが均一に分散されず、摩耗むらが生じた。Welding or thermal spraying of WC-based metal has also been adopted, but this method cannot form a thick layer of WC and does not lead to a long life, and the WC is uniformly dispersed by the welding method. However, uneven wear occurred.
【０００４】[0004]
【発明の目的、構成、作用、効果】そこで、本発明の目
的は、溶融金属に対する耐腐食性に優れていることは勿
論のこと、耐摩耗性も良好な金属材料の複合表面処理方
法を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a composite surface treatment method for a metal material which is excellent not only in corrosion resistance against molten metal but also in wear resistance. To do.
【０００５】以上の目的を達成するため、本発明に係る
金属材料の複合表面処理方法は、金属材料の表面に溶接
又は溶射によってＣｏ基合金からなる下盛層を形成し、
この下盛層の表面に熱間静水圧法によって、Ｃｏ基合金
と約１０〜９０ｖｏｌ％のタングステンカーバイト、ク
ロムカーバイト、チタンカーバイト、ニオブカーバイト
の少なくとも１種類を含む上盛層を形成することを特徴
とする。In order to achieve the above object, the method of composite surface treatment of a metallic material according to the present invention comprises forming an underlayer made of a Co-based alloy on the surface of the metallic material by welding or thermal spraying,
An upper layer containing a Co-based alloy and at least one of tungsten carbide, chromium carbide, titanium carbide and niobium carbide is formed on the surface of the lower layer by a hot isostatic method. It is characterized by doing.
【０００６】溶接には、ガス、アーク、プラズマを用い
た種々の方法があり、ワイヤ、粉末に形成された溶接材
料を溶融させて金属材料表面に肉盛りを行う。特に、プ
ラズマ粉体溶接法とは、移行性プラズマアーク（Plasma
Transferred Arc）を利用した溶接法であり、電気アー
クによって溶接トーチ内にアルゴンガスのプラズマを発
生させ、ここに粉末を供給して溶融し、さらにプラズマ
アークにより母材表面に溶接を行う。熱間静水圧法（Ho
t Isostatic Pressing）とは、高圧加熱容器に被処理品
を装填し、高温加熱下で不活性の圧媒ガス（通常、アル
ゴンガスを使用する）によって等方的に超高圧を加え、
金属−金属（粉末）の拡散接合を行う。There are various methods of welding using gas, arc, and plasma. The welding material formed into a wire or powder is melted to build up the surface of the metal material. In particular, the plasma powder welding method is a transferable plasma arc (Plasma
Transferred Arc) is a welding method in which plasma of argon gas is generated in the welding torch by an electric arc, powder is supplied to the plasma and melted, and further welding is performed on the base material surface by the plasma arc. Hot hydrostatic pressure method (Ho
t Isostatic Pressing) is to load the article to be processed in a high-pressure heating container, and apply isotropic ultra-high pressure with an inert pressure medium gas (usually using argon gas) under high temperature heating,
Diffusion bonding of metal-metal (powder) is performed.
【０００７】一般に、溶接では硬さに限界があり、溶射
では厚さに限界がある。本発明では、Ｃｏ基合金を溶接
又は溶射によって形成した下盛層の表面に、Ｃｏ基合金
とＷＣ，ＣｒＣ，ＴｉＣ，ＮｂＣの少なくとも１種類と
が冶金結合された上盛層を熱間静水圧法によって形成し
たため、溶融亜鉛、アルミニュウム等に対する耐腐食性
に優れていることは勿論、下盛層及び上盛層が全体とし
て約８００〜１６００Ｈｖの硬度がクラックの発生なし
で得られ、亜鉛めっきのドロスの硬度は６８０Ｈｖであ
るため、耐摩耗性も十分に備え、従来品の３倍以上の寿
命を維持することができる。Generally, there is a limit in hardness in welding and a limit in thickness in thermal spraying. In the present invention, a hot overlaying layer in which a Co-based alloy and at least one of WC, CrC, TiC, and NbC are metallurgically bonded to the surface of the underlaying layer formed by welding or spraying a Co-based alloy is formed by hot isostatic pressing. Since it is formed by the method, it has excellent corrosion resistance to molten zinc, aluminum, etc., and the lower layer and the upper layer as a whole have a hardness of about 800 to 1600 Hv without cracks, and are excellent in galvanization. Since the dross has a hardness of 680 Hv, it has sufficient wear resistance and can maintain a life three times or more that of conventional products.
【０００８】特に、Ｃｏ基合金にＳｉ，Ｂを含有させれ
ば、熱間静水圧処理で下盛層が溶融し、金属材料と下盛
層との間のみならず、下盛層と上盛層との間も冶金結合
となる。In particular, when the Co-based alloy contains Si and B, the underlaying layer is melted by the hot isostatic pressure treatment, so that not only between the metal material and the underlaying layer but also the underlaying layer and the overlaying layer. A metallurgical bond is also formed between the layers.
【０００９】本発明において、下盛層は金属材料と上盛
層との媒体として働き、なおかつ、金属材料と上盛層の
熱膨張の緩和作用がある。従って、本発明で複合表面処
理された金属部品は、使用中にライニング層（下盛層、
上盛層）が圧力で剥離したりするおそれがない。In the present invention, the lower layer functions as a medium between the metallic material and the upper layer, and also has the effect of relaxing the thermal expansion of the metallic material and the upper layer. Therefore, the composite surface-treated metal component of the present invention has a lining layer (underlay layer,
There is no risk of the upper layer) peeling due to pressure.
【００１０】[0010]
【実施例】以下、本発明に係る金属材料の複合表面処理
方法の実施例について添付図面を参照して説明する。EXAMPLES Examples of the composite surface treatment method for metallic materials according to the present invention will be described below with reference to the accompanying drawings.
【００１１】（連続亜鉛めっき装置）図１は鋼板に対す
る連続亜鉛めっき装置を示し、主に、溶融亜鉛浴槽１と
スナウト２とガイドロール３と一対のスナップロール
４，４とで構成されている。スナウト２は鋼板Ｓを溶融
亜鉛浴槽１に連続的に投入するためのもので、窒素等の
不活性ガスが充填されている。ガイドロール３及びスナ
ップロール４，４はそれぞれ支軸５，６，６を備え、図
示しない駆動源に連結され、矢印方向に定速で回転駆動
される。なお、この連続亜鉛めっき装置には、図示しな
いが、他に、インゴット投入装置、ドロス回収装置、ロ
ール３，４，４の架台等が設けられている。(Continuous Galvanizing Apparatus) FIG. 1 shows a continuous galvanizing apparatus for steel sheets, which is mainly composed of a molten zinc bath 1, a snout 2, a guide roll 3 and a pair of snap rolls 4, 4. The snout 2 is for continuously charging the steel plate S into the molten zinc bath 1, and is filled with an inert gas such as nitrogen. The guide roll 3 and the snap rolls 4 and 4 are provided with support shafts 5, 6 and 6, respectively, and are connected to a drive source (not shown), and are rotationally driven at a constant speed in the arrow direction. In addition, although not shown, the continuous galvanizing apparatus is provided with an ingot feeding device, a dross collecting device, a stand for the rolls 3, 4, 4 and the like.
【００１２】（実施品）ところで、本発明者らは、前記
ガイドロール３の支軸５を被覆するスリーブ７と（図２
参照）とその軸受８（図３参照）に、耐腐食性、耐摩耗
性向上のために以下に説明する表面ライニング層７ａ，
８ａを形成した。図２、図３において付された数値は各
部分の寸法（単位ｍｍ）である。(Practical product) By the way, the present inventors have developed a sleeve 7 (see FIG. 2) for covering the support shaft 5 of the guide roll 3.
(See FIG. 3) and its bearing 8 (see FIG. 3), a surface lining layer 7a, which will be described below, for improving corrosion resistance and wear resistance.
8a was formed. The numerical values given in FIGS. 2 and 3 are the dimensions (unit: mm) of each part.
【００１３】ライニング層７ａ，８ａは、それぞれの母
材表面にプラズマ粉体溶接法によってＣｏ基合金からな
る下盛層を形成して厚さ３ｍｍに研削し、この下盛層表
面に熱間静水圧法によってＣｏ基合金とタングステンカ
ーバイトからなる厚さ５ｍｍの上盛層を形成した。スリ
ーブ７及び軸受８の材料はいずれもＳＵＳ３１６Ｌ（日
本工業規格）である。下盛層は粒度＃１００〜３５０の
Ｃｏ基合金を材料とし、上盛層は粒度＃３５０のＣｏ基
合金と粒度＃３２５のタングステンカーバイト４０ｖｏ
ｌ％との混合物を材料とした。As for the lining layers 7a and 8a, a base layer made of a Co-based alloy is formed on the surface of each base material by a plasma powder welding method and ground to a thickness of 3 mm. A 5 mm-thick overlay layer composed of a Co-based alloy and tungsten carbide was formed by a hydraulic method. The material of the sleeve 7 and the bearing 8 is SUS316L (Japanese Industrial Standard). The lower layer is made of a Co-based alloy having a grain size of # 100 to 350, and the upper layer is made of a Co-based alloy having a grain size of # 350 and a tungsten carbide having a grain size of 325 40 vo.
A mixture with 1% was used as a material.
【００１４】各材料の化学成分は第１表に示すとおりで
ある。The chemical composition of each material is shown in Table 1.
【００１５】[0015]
【表１】 [Table 1]
【００１６】ここで、プラズマ粉体溶接法と熱間静水圧
法について説明する。 （プラズマ粉体溶接法）プラズマ粉体溶接法は、図４に
示すように、溶接トーチ１０の中心孔１１にタングステ
ン電極１２を設け、中心孔１１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１０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１０の粉末供給孔１３からＣ
ｏ基合金粉末を供給する。この粉末はメインアークＭａ
によって溶融し、母材１５の表面に溶着し、肉盛層１５
ａになる。また、溶接トーチ１０のガス供給孔１４から
はシールドガス（通常、アルゴンガス）が供給される。Here, the plasma powder welding method and the hot isostatic pressing method will be described. (Plasma powder welding method) In the plasma powder welding method, as shown in FIG. 4, a tungsten electrode 12 is provided in a center hole 11 of a welding torch 10, and argon gas is supplied to the center hole 11 to generate a gas plasma. . Pilot arc Pa and main arc Ma are ejected from the tip of welding torch 10. At the same time, from the powder supply hole 13 of the welding torch 10 to C
Supply o-based alloy powder. This powder is the main arc Ma
Melts and is welded to the surface of the base material 15 to form the overlay layer 15.
It becomes a. A shield gas (usually argon gas) is supplied from the gas supply hole 14 of the welding torch 10.
【００１７】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、ティグ溶接、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金
属が得られる。 （２）肉盛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、一般金属の他各種炭化
物を主成分とする超硬複合合金の肉盛も容易に行うこと
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
ホール等の欠陥が少ない。 （４）溶融溶接であるため、母材との結合は冶金結合で
あり、剥離等の問題はない。Such plasma powder welding method has the following features as compared with other welding methods (covered arc welding, TIG welding, MIG welding, submerged welding, gas welding). (1) The penetration depth into the base metal is small, and the dilution rate is usually 5
% Or less. Therefore, the build-up metal having the target chemical composition 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 a wire or rod, and it is possible to easily build up a cemented carbide composite alloy whose main component is various carbides in addition to general metals. The carbide content can also be adjusted freely. (3) Since it is automatic welding in argon gas, there are few defects such as blowholes. (4) Since it is fusion welding, the bond with the base material is metallurgical bond, and there is no problem such as peeling.
【００１８】プラズマ粉体溶接法で使用される材料の主
要成分は、例えば、２８Ｃｒ−３Ｗ−１Ｃ−Ｃｏ（硬度
４５０Ｈｖ）、３０Ｃｒ−８Ｗ−１．５Ｃ−Ｃｏ（硬度
５５０Ｈｖ）、３０Ｃｒ−１０Ｗ−２．５Ｃ−Ｃｏ（硬
度６５０Ｈｖ）である。The main components of the material used in the plasma powder welding method are, for example, 28Cr-3W-1C-Co (hardness 450Hv), 30Cr-8W-1.5C-Co (hardness 550Hv), 30Cr-10W-. It is 2.5C-Co (hardness 650Hv).
【００１９】（熱間静水圧法）次に、熱間静水圧法は、
図５に示す装置を使用して処理される。この熱間静水圧
装置は、概略、本体部２０と、プレスフレーム２５と、
ガス供給部３０と、搬送部３５と、加熱電源制御部４０
とで構成されている。本体部２０は、被処理品を収容す
るために圧力容器２１の内部にＭｏヒータ２２を設け、
加熱炉を構成している。プレスフレーム２５は、圧力容
器２１内のガス圧を保持するためのもので、鋼板積層構
造になっている。ガス供給部３０は、Ａｒ圧媒ガスを圧
力容器２１に加圧注入し、処理後回収するためのもの
で、ガス圧縮機３１、圧力調整器３２、ガス集合装置３
３、真空ポンプ３４等によって構成されている。搬送部
３５は被処理品を圧力容器２１に送り込み、処理後取り
出すためのものである。(Hot hydrostatic pressure method) Next, the hot hydrostatic pressure method is as follows.
It is processed using the apparatus shown in FIG. This hot hydrostatic pressure device roughly includes a main body portion 20, a press frame 25,
Gas supply unit 30, transfer unit 35, and heating power supply control unit 40
It consists of and. The main body portion 20 is provided with a Mo heater 22 inside a pressure vessel 21 for accommodating an object to be processed,
It constitutes a heating furnace. The press frame 25 is for holding the gas pressure in the pressure vessel 21, and has a steel plate laminated structure. The gas supply unit 30 is for injecting Ar pressure medium gas into the pressure vessel 21 under pressure, recovering after processing, and includes a gas compressor 31, a pressure regulator 32, and a gas collecting apparatus 3.
3, a vacuum pump 34 and the like. The carrying section 35 is for sending the article to be processed into the pressure vessel 21 and taking it out after processing.
【００２０】この熱間静水圧法では、被処理品を圧力容
器２１に収容すると共に材料粉末を投入し、加圧加熱処
理を行う。加圧及び加熱の条件は図６に示すとおりであ
る。In this hot hydrostatic pressure method, the article to be treated is housed in the pressure vessel 21 and the material powder is added to carry out the pressure heating treatment. Pressurization and heating conditions are as shown in FIG.
【００２１】（実施品の性能）以上の如きプラズマ粉体
溶接法及び熱間静水圧法で複合表面処理されたスリーブ
７及び軸受８の性能について説明する。(Performance of Implemented Product) The performance of the sleeve 7 and the bearing 8 which have been subjected to the composite surface treatment by the plasma powder welding method and the hot isostatic pressure method as described above will be described.
【００２２】肉盛層のミクロ組織を顕微鏡写真をとって
見たところ、未溶解のＷＣが均一に分散した組織を示し
た（写真の添付は省略する）。肉盛層の深さ方向硬度は
図７に示すように分布し、７５０Ｈｖ程度の均一な分布
を示した。プラズマ粉体溶接法単独では７００Ｈｖ程度
が限界であり、クラックの発生のおそれもある。しか
し、熱間静水圧法を併用することにより、８００〜１６
００Ｈｖの硬度が得られ、クラックの発生もない。但
し、本実施品ではドロスの硬度６８０Ｈｖに対応させて
約７５０Ｈｖの硬度が得られるようにした。肉盛層の厚
さに関しては、下盛層は約０．５〜３ｍｍ、上盛層は約
２〜１５ｍｍが適当である。When the microstructure of the build-up layer was observed by taking a micrograph, it showed a structure in which undissolved WC was uniformly dispersed (attachment of the photo is omitted). The hardness in the depth direction of the overlay was distributed as shown in FIG. 7, showing a uniform distribution of about 750 Hv. The plasma powder welding method alone has a limit of about 700 Hv, which may cause cracks. However, by using the hot isostatic method together,
A hardness of 00 Hv is obtained, and no crack is generated. However, in this embodiment, a hardness of about 750 Hv was obtained corresponding to the dross hardness of 680 Hv. Regarding the thickness of the overlay layer, it is suitable that the lower overlay layer is about 0.5 to 3 mm and the upper overlay layer is about 2 to 15 mm.
【００２３】耐摩耗性に関しては、図８に示すように、
回転台５０の上面にエメリーペーパー５１を貼り付けた
ピンオンデスク摩耗試験によって評価した。試験片５２
は前述の方法で形成された肉盛層を備えている。試験条
件は第２表に示すとおりである。Regarding wear resistance, as shown in FIG.
It was evaluated by a pin-on-desk wear test in which an emery paper 51 was attached to the upper surface of the rotary table 50. Test piece 52
Has a built-up layer formed by the method described above. The test conditions are as shown in Table 2.
【００２４】[0024]
【表２】 [Table 2]
【００２５】ピンオンデスク摩耗試験の結果は図９に示
すとおりである。線Ａ，Ｂは従来の肉盛溶接法にて製作
した試験片の結果であり、ＡのステライトＮｏ．６とは
２８Ｃｒ−３Ｗ−１Ｃ−Ｃｏを主要成分とするＣｏ基合
金である。線Ｃは本実施品の結果であり、線Ｄの超硬合
金に匹敵する耐摩耗性を示した。The results of the pin-on-desk wear test are shown in FIG. Lines A and B are the results of the test piece manufactured by the conventional overlay welding method. 6 is a Co-based alloy containing 28Cr-3W-1C-Co as a main component. Line C is the result of the product of the present embodiment, and showed wear resistance comparable to that of the cemented carbide of line D.
【００２６】次に、Ｚｎ耐腐食性に関しては、図１０に
示すように、溶融亜鉛を満たしたるつぼ５５に肉盛層の
みからなる試験片５９を浸漬し、このるつぼ５５を断熱
容器５６内にセットしてヒータ５７で加熱した。試験条
件は第３表に示すとおりであり、試験後の板厚減及び断
面ミクロ組織の観察（電子顕微鏡による）に基づくＺｎ
の拡散量によって評価した。Next, regarding Zn corrosion resistance, as shown in FIG. 10, a test piece 59 consisting of only the overlay layer is immersed in a crucible 55 filled with molten zinc, and the crucible 55 is placed in a heat insulating container 56. It was set and heated by the heater 57. The test conditions are shown in Table 3, and Zn based on the reduction of the plate thickness and the observation of the cross-sectional microstructure (by an electron microscope) after the test
It was evaluated by the amount of diffusion.
【００２７】[0027]
【表３】 [Table 3]
【００２８】Ｚｎ浸漬結果を第４表に示す。第４表から
明らかなように、全ての試験片で板厚減は認められなか
った。しかし、断面ミクロ組織の観察によれば、Ｚｎの
拡散層厚に違いが認められた。本実施品であるＷＣ複合
合金は、従来の肉盛溶接を行ったステライトＮｏ．６、
ＣｒＣ合金に比べて、Ｚｎ拡散層厚が１０μｍと小さ
く、優れたＺｎ耐腐食性を示した。The results of immersion in Zn are shown in Table 4. As is clear from Table 4, no plate thickness reduction was observed in any of the test pieces. However, the observation of the cross-sectional microstructure revealed a difference in the thickness of the Zn diffusion layer. The WC composite alloy of this embodiment is Stellite No. which has been subjected to conventional overlay welding. 6,
Compared with the CrC alloy, the Zn diffusion layer thickness was as small as 10 μm, and excellent Zn corrosion resistance was exhibited.
【００２９】[0029]
【表４】 [Table 4]
【００３０】（実機使用実績）次に、前記スリーブ７、
軸受８を図１に示した連続亜鉛めっき装置に使用した実
機使用実績を説明する。実機使用条件は第５表に示すと
おりである。なお、ここで使用されたスリーブ及び軸受
は下盛層が３ｍｍの厚さ、上盛層が５ｍｍの厚さであ
る。(Results of actual use) Next, the sleeve 7,
The actual use results of the bearing 8 used in the continuous galvanizing apparatus shown in FIG. 1 will be described. The actual machine usage conditions are as shown in Table 5. In the sleeve and the bearing used here, the lower overlay layer has a thickness of 3 mm and the upper overlay layer has a thickness of 5 mm.
【００３１】[0031]
【表５】 [Table 5]
【００３２】以下の第６表に実機使用結果を示す。比較
品１，２はそれぞれ従来の肉盛溶接によって肉盛層を形
成したもので、１６日間の使用によって筋状の摩耗が発
生し、寿命となった。これに対して、実施品は２０日間
の使用によっても筋状の摩耗は認められず、軸受は４０
日以上、スリーブは１２０日以上の使用が可能であっ
た。Table 6 below shows the results of actual use. Comparative products 1 and 2 each had a build-up layer formed by conventional build-up welding, and after being used for 16 days, streak-like wear occurred and the life was reached. On the other hand, in the case of the implemented product, no streaky wear was observed even after 20 days of use, and the bearing had 40
The sleeve could be used for more than 120 days and for more than 120 days.
【００３３】[0033]
【表６】 [Table 6]
【００３４】ところで、前記熱間静水圧法による上盛層
の形成に使用する材料であるが、Ｃｏ基合金と混合され
るタングステンカーバイトの混合比は約１０〜９０ｖｏ
ｌ％の範囲が好ましい。１０ｖｏｌ％を下回ると耐摩耗
性が低下し、９０ｖｏｌ％を上回るとクラックが発生す
るおそれがある。By the way, the material used for forming the overlay layer by the hot isostatic pressure method, the mixing ratio of the tungsten carbide mixed with the Co-based alloy is about 10 to 90 vo.
A range of 1% is preferred. If it is less than 10 vol%, the wear resistance is lowered, and if it exceeds 90 vol%, cracks may occur.
【００３５】また、熱間静水圧法による上盛層の形成に
Ｃｏ基合金と混合して使用する材料としては、前記タン
グステンカーバイトの他にクロムカーバイト、チタンカ
ーバイト、ニオブカーバイトを使用することができ、少
なくともこれらの材料を１種類であるいは任意の割合
で、例えば、炭化物の混合比としては、約５０ｖｏｌ％
のＴｉＣと３０ｖｏｌ％のＷＣ、又は約４０ｖｏｌ％の
ＷＣと２０ｖｏｌ％のＴｉＣと２０ｖｏｌ％のＮｂＣ、
の割合で混合して使用可能である。In addition to the above tungsten carbide, chromium carbide, titanium carbide, and niobium carbide are used as the material mixed with the Co-based alloy for forming the overlay layer by the hot isostatic pressing method. At least one of these materials may be used alone or in any ratio, for example, as a mixing ratio of carbides, about 50 vol%.
TiC and 30 vol% WC, or about 40 vol% WC and 20 vol% TiC and 20 vol% NbC,
It is possible to mix and use it in the ratio of.
【００３６】なお、本発明に係る金属材料の複合表面処
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可能である。特に、下盛層の形
成はプラズマ粉体溶接法以外にガス、アーク等を用いた
種々の肉盛溶接法あるいは肉盛溶射によって形成しても
よい。さらに、本発明の適用部品はガイドロール３のス
リーブ７や軸受８に限定することなく、スナップロール
４の部品等であってもよい。あるいは、溶融亜鉛めっき
浴中ロール部品以外にも、耐腐食性、耐摩耗性を要求さ
れる金属部品に広く本発明を適用できる。The composite surface treatment method for a metal material according to the present invention is not limited to the above-mentioned embodiment, but can be variously modified within the scope of the invention. In particular, the lower layer may be formed by various overlay welding methods using gas, arc or the like or overlay welding other than the plasma powder welding method. Further, the parts to which the present invention is applied are not limited to the sleeve 7 and the bearing 8 of the guide roll 3 and may be parts of the snap roll 4 or the like. Alternatively, the present invention can be widely applied to metal parts requiring corrosion resistance and wear resistance other than roll parts in a hot dip galvanizing bath.
【００３７】また、プラズマ粉体溶接法の溶接条件、熱
間静水圧法の処理条件は、金属部品の大きさ、形状に合
わせて種々の条件を採用できる。さらに、金属材料とし
ては３１６Ｌ以外に、オーステナイト系、フェライト系
のステンレスでも良好な効果を得ることができる。これ
らの使い分けは、使用条件を考慮して決められる。例え
ば、Ｚｎ浴中で使用する場合、高温脆性が小さいオース
テナイト系、フェライト系が良好であり、フェライト系
はオーステナイト系に比較して熱膨張率が小さく、熱間
静水圧による拡散層が健全に保たれ、フェライト系は好
ましい材料である。勿論これら以外の材料であってもよ
い。As the welding conditions of the plasma powder welding method and the processing conditions of the hot hydrostatic pressure method, various conditions can be adopted according to the size and shape of the metal part. In addition to 316L, austenitic and ferritic stainless steels can be used as the metallic material to obtain good effects. The proper use of these is determined in consideration of usage conditions. For example, when used in a Zn bath, austenitic and ferritic materials, which have low high-temperature brittleness, are good. Ferritic materials have a smaller coefficient of thermal expansion than austenitic materials, and the diffusion layer due to hot isostatic pressure is kept healthy. Flapping is the preferred material. Of course, materials other than these may be used.
【図１】連続亜鉛めっき装置を示す概略構成図。FIG. 1 is a schematic configuration diagram showing a continuous galvanizing apparatus.
【図２】本発明を適用したスリーブを示す断面図。FIG. 2 is a sectional view showing a sleeve to which the present invention is applied.
【図３】本発明を適用した軸受を示し、（Ａ）は正面
図、（Ｂ）は側面図。FIG. 3 shows a bearing to which the present invention is applied, (A) is a front view, and (B) is a side view.
【図４】プラズマ溶接トーチを示す断面図。FIG. 4 is a sectional view showing a plasma welding torch.
【図５】熱間静水圧装置を示す概略構成図。FIG. 5 is a schematic configuration diagram showing a hot hydrostatic device.
【図６】熱間静水圧法の処理条件を示すチャート図。FIG. 6 is a chart showing processing conditions of the hot isostatic method.
【図７】実施品の肉盛層硬度を示すチャート図。FIG. 7 is a chart showing the hardness of a hardfacing layer of a practical product.
【図８】ピンオンデスク摩耗試験機を示す概略構成図。FIG. 8 is a schematic configuration diagram showing a pin-on-desk wear tester.
【図９】実施品の摩耗試験結果を示すチャート図。FIG. 9 is a chart showing the results of the wear test of the implemented products.
【図１０】実施品の腐食試験装置を示す概略構成図。FIG. 10 is a schematic configuration diagram showing a corrosion test apparatus of an implemented product.
７…スリーブ ７ａ…ライニング層 ８…軸受 ８ａ…ライニング層 7 ... Sleeve 7a ... Lining layer 8 ... Bearing 8a ... Lining layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 辰巳 佳宏 兵庫県尼崎市常光寺１丁目９番１号 大阪 富士工業株式会社内 (72)発明者 上田 実 兵庫県姫路市林田町下伊勢970番地 金属 技研株式会社姫路工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshihiro Tatsumi, Inventor Yoshihiro Tatsumi 1-9-1, Jokoji, Amagasaki City, Hyogo Prefecture, Osaka Fuji Kogyo Co., Ltd. (72) Minor Ueda, 970 Shimoise, Shimoda-cho, Himeji-shi, Hyogo Pref. Himeji Factory Co., Ltd.
Claims (4)
てＣｏ基合金からなる下盛層を形成し、 前記下盛層の表面に、熱間静水圧法によって、Ｃｏ基合
金と約１０〜９０ｖｏｌ％のタングステンカーバイト、
クロムカーバイト、チタンカーバイト、ニオブカーバイ
トの少なくとも１種類を含む上盛層を形成すること、 を特徴とする金属材料の複合表面処理方法。1. A lower layer made of a Co-based alloy is formed on the surface of a metal material by welding or thermal spraying, and a Co-based alloy and about 10 to 90 vol are formed on the surface of the lower layer by a hot hydrostatic pressure method. % Tungsten carbide,
A composite surface treatment method for a metal material, comprising forming an overlay layer containing at least one of chromium carbide, titanium carbide and niobium carbide.
あり、前記上盛層は厚みが約２〜１５ｍｍであることを
特徴とする請求項１記載の金属材料の複合表面処理方
法。2. The composite surface treatment of a metal material according to claim 1, wherein the lower layer has a thickness of about 0.5 to 3 mm, and the upper layer has a thickness of about 2 to 15 mm. Method.
形成することを特徴とする請求項１又は請求項２記載の
金属材料の複合表面処理方法。3. The composite surface treatment method for a metal material according to claim 1, wherein the lower layer is formed by plasma powder welding.
させたことを特徴とする請求項１、請求項２又は請求項
３記載の金属材料の複合表面処理方法。4. The composite surface treatment method for a metal material according to claim 1, 2 or 3, wherein the Co-based alloy contains silicon and boron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06479894A JP3291116B2 (en) | 1994-04-01 | 1994-04-01 | Composite surface treatment method for metal materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06479894A JP3291116B2 (en) | 1994-04-01 | 1994-04-01 | Composite surface treatment method for metal materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07268648A true JPH07268648A (en) | 1995-10-17 |
| JP3291116B2 JP3291116B2 (en) | 2002-06-10 |
Family
ID=13268629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06479894A Expired - Lifetime JP3291116B2 (en) | 1994-04-01 | 1994-04-01 | Composite surface treatment method for metal materials |
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| Country | Link |
|---|---|
| JP (1) | JP3291116B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000266055A (en) * | 1999-03-18 | 2000-09-26 | Kinzoku Giken Kk | Corrosion- and abrasion-resistant sliding member and manufacturing of the same |
| JP2003247084A (en) * | 2002-02-25 | 2003-09-05 | Ebara Corp | Coated member having corrosion resistance and wear resistance |
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1994
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000266055A (en) * | 1999-03-18 | 2000-09-26 | Kinzoku Giken Kk | Corrosion- and abrasion-resistant sliding member and manufacturing of the same |
| JP2003247084A (en) * | 2002-02-25 | 2003-09-05 | Ebara Corp | Coated member having corrosion resistance and wear resistance |
| JP2003340511A (en) * | 2002-05-27 | 2003-12-02 | Sumitomo Metal Ind Ltd | Conveyor roller for high temperature material |
| JP2012501382A (en) * | 2008-09-01 | 2012-01-19 | バント−ツィンク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Guide roll rotating bearing for metal molten bath |
| JP2010077466A (en) * | 2008-09-24 | 2010-04-08 | Fujico Co Ltd | Roll bearing structure in molten plating bath and method of manufacturing the same |
| JP2014169494A (en) * | 2013-02-28 | 2014-09-18 | Hirai Kogyo Kk | Gas wiping nozzle |
| JP2015123446A (en) * | 2013-12-27 | 2015-07-06 | 兼房株式会社 | Crushing blade |
| WO2019167148A1 (en) * | 2018-02-27 | 2019-09-06 | 日本製鉄株式会社 | Member for equipment in bath, equipment in molten metal bath, and molten metal plating material production device |
| WO2019167149A1 (en) * | 2018-02-27 | 2019-09-06 | 日本製鉄株式会社 | Member for equipment in baths, equipment in molten metal bath, and molten metal plating material production device |
| CN111315919A (en) * | 2018-02-27 | 2020-06-19 | 日本制铁株式会社 | Member for in-bath facility, molten metal in-bath facility, and hot-dip plated metal material production device |
| CN111386360A (en) * | 2018-02-27 | 2020-07-07 | 日本制铁株式会社 | Member for in-bath facility, molten metal in-bath facility, and hot-dip plated metal material production device |
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| JP3291116B2 (en) | 2002-06-10 |
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